Metal\uffe2\uff80\uff90free carbon electrodes with well\uffe2\uff80\uff90defined composition and smooth topography are prepared via sputter deposition followed by thermal treatment with inert and reactive gases. X\uffe2\uff80\uff90ray photoelectron spectroscopy (XPS) and Raman spectroscopy show that three carbons of similar N/C content that differ in N\uffe2\uff80\uff90site composition are thus prepared: an electrode consisting of almost exclusively graphitic\uffe2\uff80\uff90N (NG), an electrode with predominantly pyridinic\uffe2\uff80\uff90N (NP), and one with \uffe2\uff89\uff881:1 NG:NP composition. These materials are used as model systems to investigate the activity of N\uffe2\uff80\uff90doped carbons in the oxygen reduction reaction (ORR) using voltammetry. Results show that selectivity toward 4e\uffe2\uff80\uff90reduction of O2 is strongly influenced by the NG/NP site composition, with the material possessing nearly uniform NG/NP composition being the only one yielding a 4e\uffe2\uff80\uff90reduction. Computational studies on model graphene clusters are carried out to elucidate the effect of N\uffe2\uff80\uff90site homogeneity on the reaction pathway. Calculations show that for pure NG\uffe2\uff80\uff90doping or NP\uffe2\uff80\uff90doping of model graphene clusters, adsorption of hydroperoxide and hydroperoxyl radical intermediates, respectively, is weak, thus favoring desorption prior to complete 4e\uffe2\uff80\uff90reduction to hydroxide. Clusters with mixed NG/NP sites display synergistic effects, suggesting that co\uffe2\uff80\uff90presence of these sites improves activity and selectivity by achieving high theoretical reduction potentials while facilitating retention of intermediates.---
stocks de carbone dans le sol", "[SDV.SA.SF] Life Sciences [q-bio]/Agricultural sciences/Silviculture", " forestry", "\u00e9pic\u00e9a de Sitka", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1051/forest:2005078"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Annals%20of%20Forest%20Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1051/forest:2005078", "name": "item", "description": "10.1051/forest:2005078", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1051/forest:2005078"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-12-01T00:00:00Z"}}, {"id": "10.1007/s00894-025-06491-9", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:14:43Z", "type": "Journal Article", "created": "2025-09-13", "title": "Modification of biochar by iron containing adsorption centers as a method to enhance the remediation of perfluorooctanoic (PFOA) and (PFOS) acids from water and soil: a density functional theory study", "description": "Context: Perfluoroalkyl and polyfluoroalkyl substances (PFAS), with over 15,000 types listed in the US EPA\u2019s CompTox database, are found in everyday items like textiles, packaging, firefighting foams, and medical devices. Their widespread use has led to concerning health effects\u2014including cancers, elevated cholesterol, and fertility issues\u2014with detectable levels present in 98% of Americans. While perfluorooctanoic (PFOA) and perfluorooctanesulphonic (PFOS) are among the most studied, their environmental behavior and ecological interactions remain poorly understood. Advances in computer-based methods, including chemoinformatics and quantum modeling, now aid in predicting properties and simulating PFAS dynamics. Biochar (BC), produced via biomass pyrolysis under limited oxygen, is known for its porosity and adsorption capabilities. Magnetic biochar (MBC), enhanced with iron-based compounds, adds the benefit of magnetic separation, making it ideal for water decontamination. This paper explores the use of MBC to remove PFOA and PFOS from the environment, leveraging computational tools to investigate molecular interactions and adsorption properties. Methods: A doubled crystallographic unit of hematite (Fe\u2082\u2084O\u2083\u2086) was constructed and fully optimized using density functional theory (DFT) with the M06-2X functional. Geometry optimization used the 6-31G(d,p) basis set, while single-point energies were calculated with 6\u2013311 + + G(d,p). Antiferromagnetic conditions were ensured by setting the total spin to zero (Sz = 0), and triplet instability analysis was performed to evaluate ferromagnetic potential. To simulate bulk water effects on adsorption, the CPCM solvation model (\u03b5 = 78.3) was applied. Harmonic frequency analysis confirmed structural minima, and Gibbs free energies were calculated using Gaussian 16. PFOA and PFOS, with highly negative pKa values (~ \u20130.1 and <). Quadratic SCF convergence (scf = qc) addressed numerical challenges, and interaction energies were corrected for basis set superposition error using the counterpoise method. Calculated IR spectra and molecular visualizations were generated with Chemcraft, without applying scaling factors.", "keywords": ["Original Paper", "Magnetic biochar", "PFAS remediation", "Density functional theory (DFT)", "Perfluorooctanoic acid", "Perfluorooctanesulphonic acid", "Poly-fluoroalkyl substances"], "contacts": [{"organization": "Gorb, Leonid, Sosnowska, Anita, Bulawska, Natalia, Leszczynska, Danuta, Puzyn, Tomasz, Leszczynski, Jerzy,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1007/s00894-025-06491-9"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Molecular%20Modeling", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00894-025-06491-9", "name": "item", "description": "10.1007/s00894-025-06491-9", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00894-025-06491-9"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-09-13T00:00:00Z"}}, {"id": "10.1007/s10457-023-00820-8", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:14:51Z", "type": "Journal Article", "created": "2023-02-25", "title": "Subsoiling for planting trees in dehesa system: long-term effects on soil organic carbon", "description": "Abstract
Incorporating trees into agricultural systems, including grasslands, increases the soil organic carbon sequestration and contributes to climate change mitigation. Site preparation for tree establishment is a common practice that can involve a variety of techniques and agricultural implements such as subsoiling. This study aimed to evaluate the long-term effects of subsoiling on soil organic carbon (SOC) concentrations and stocks in a Mediterranean grassland afforested with holm oaks 22\uffc2\uffa0years ago and now converted into a Dehesa agroforestry system. The study was conducted in a dehesa farm in Southwest Spain. Soil samples were taken at six depths under 10 tree canopies within and outside the original subsoiling line. Subsoiling significantly decreased SOC concentration. Mean SOC concentration in the first 20\uffc2\uffa0cm was 30% lower at the subsoiling line. SOC stocks for the first 60\uffc2\uffa0cm were 2660\uffc2\uffa0g\uffc2\uffa0m\uffe2\uff88\uff922 within the subsoiling line and 4320\uffc2\uffa0g\uffc2\uffa0m\uffe2\uff88\uff922 outside the line. There was a clear reduction in SOC concentration and stock with increasing depth. Root abundance and deeper rooting increased with subsoiling but did not translate into sufficient carbon accumulation in the soil, which is moderate even after 22\uffc2\uffa0years. This study reveals that, in the long term, there is a trade-off in CO2 sequestration between tree planting and soil subsoiling, highlighting the need for further research into the potential benefits and detriments of subsoiling.Management measures to reduce atmospheric carbon dioxide concentrations by increasing soil organic carbon (SOC) storage need verification, e.g., by periodic sampling of soils to estimate resulting changes in SOC stock. Estimates of SOC stocks are affected by content of rock fragments (systematic bias) and soil bulk density (random but significant effect), both of which may vary significantly between soils. We investigated the importance of using site-specific bulk density and correcting for rock fragment content on estimates of SOC stock in 0\u201350 cm depth of agricultural minerals soils, collected in 2019 in the Danish National Square Grid. We found that use of an average bulk density value for a given soil type category produced valid estimates of SOC stocks for regional/national inventories. However, large variations in bulk density were found within a given soil type category, which can result in over- or under-estimation at local sites. This calls for measurement of site-specific bulk density and rock fragment content to produce valid estimates of field-scale SOC stock, e.g., to be used in farm carbon credit schemes.
", "keywords": ["Rock fragment content", "Soil bulk density", "13. Climate action", "National soil carbon inventory", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "Agricultural mineral soil", "Soil organic carbon stock", "01 natural sciences", "Soil bulk density", " Rock fragment content", " Soil organic carbon stock", " National soil carbon inventory", " Agricultural mineral soil", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.geodrs.2022.e00560"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Geoderma%20Regional", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.geodrs.2022.e00560", "name": "item", "description": "10.1016/j.geodrs.2022.e00560", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.geodrs.2022.e00560"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-09-01T00:00:00Z"}}, {"id": "10.1016/j.proci.2018.05.125", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:17:00Z", "type": "Journal Article", "created": "2018-06-21", "title": "Upward-and-downward spread of smoldering peat fire", "description": "Abstract Smoldering is the dominant combustion process in peat fire, releasing a large amount of carbon and smoke into the atmosphere. The spread of smoldering in peatland is a multi-dimensional process, which is slow, low-temperature, persistent, and difficult to detect. In this work, we investigate the upward spread of peat fire from the underground to the surface after forced ignition which is a relevant configuration but rarely studied. In the experiment, ignition is not possible if the igniter is deeper than 15\u202fcm below the free surface, regardless of moisture content or density. Once ignited, the 1st-stage upward fire spread is initiated towards the free surface (opposed smoldering) with a peak temperature of 300\u202f\u00b0C, leaving behind a char structure that does not collapse. Then, a 2nd-stage downward spread (forward smoldering) is activated with a peak temperature of 600\u202f\u00b0C and regression of free surface. The upward spread is faster than the downward spread. The rates of both upward and downward spread decrease as the peat density or depth is increased. These experimental observations are successfully captured by a 1D computational model of heat and mass transfer with 5-step kinetics. Modelling results further suggest that (1) the oxygen diffusion controls the entire upward-to-downward spread of peat fire, (2) the oxidation of peat sustains the 1st-stage upward spread, and (3) the oxidation of char sustains the 2nd-stage downward spread. This is the first study investigating the upward spread of peat fire, which helps understand the persistence of peat fire and guide the fire prevention and suppression strategies.", "keywords": ["570", "Technology", "Engineering", " Chemical", "Energy & Fuels", "0904 Chemical Engineering", "Density", "Chemical", "02 engineering and technology", "MOISTURE", "0902 Automotive Engineering", "530", "Modelling", "OXYGEN", "0201 civil engineering", "COMBUSTION", "Engineering", "0204 chemical engineering", "Science & Technology", "Critical depth", "ROLES", "Opposed and forward smoldering", "BURN", "Mechanical", "Engineering", " Mechanical", "SOIL", "DENSITY", "Physical Sciences", "DEPTH", "Thermodynamics", "Wildland fire", "0913 Mechanical Engineering"]}, "links": [{"href": "https://doi.org/10.1016/j.proci.2018.05.125"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Proceedings%20of%20the%20Combustion%20Institute", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.proci.2018.05.125", "name": "item", "description": "10.1016/j.proci.2018.05.125", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.proci.2018.05.125"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-01-01T00:00:00Z"}}, {"id": "10.1016/j.scitotenv.2017.10.213", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:17:06Z", "type": "Journal Article", "created": "2017-12-22", "title": "A simple method for the extraction and identification of light density microplastics from soil", "description": "This article introduces a simple and cost-saving method developed to extract, distinguish and quantify light density microplastics of polyethylene (PE) and polypropylene (PP) in soil. A floatation method using distilled water was used to extract the light density microplastics from soil samples. Microplastics and impurities were identified using a heating method (3-5s at 130\u00b0C). The number and size of particles were determined using a camera (Leica DFC 425) connected to a microscope (Leica wild M3C, Type S, simple light, 6.4\u00d7). Quantification of the microplastics was conducted using a developed model. Results showed that the floatation method was effective in extracting microplastics from soils, with recovery rates of approximately 90%. After being exposed to heat, the microplastics in the soil samples melted and were transformed into circular transparent particles while other impurities, such as organic matter and silicates were not changed by the heat. Regression analysis of microplastics weight and particle volume (a calculation based on image J software analysis) after heating showed the best fit (y=1.14x+0.46, R2=99%, p<0.001). Recovery rates based on the empirical model method were >80%. Results from field samples collected from North-western China prove that our method of repetitive floatation and heating can be used to extract, distinguish and quantify light density polyethylene microplastics in soils. Microplastics mass can be evaluated using the empirical model.", "keywords": ["2. Zero hunger", "Identification", "Soil", "0211 other engineering and technologies", "Extraction", "02 engineering and technology", "Light density polyethylene microplastics", "01 natural sciences", "6. Clean water", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.scitotenv.2017.10.213"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Science%20of%20The%20Total%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.scitotenv.2017.10.213", "name": "item", "description": "10.1016/j.scitotenv.2017.10.213", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.scitotenv.2017.10.213"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-03-01T00:00:00Z"}}, {"id": "10.1016/j.soilbio.2014.02.003", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:17:21Z", "type": "Journal Article", "created": "2014-02-18", "title": "Productivity Affects The Density-Body Mass Relationship Of Soil Fauna Communities", "description": "The productivity of ecosystems and their disturbance regime affect the structure of animal communities. However, it is not clear which trophic levels benefit the most from higher productivity or are the most impacted by disturbance. The density-body mass (DBM) relationship has been shown to reflect changes in the structure of communities subjected to environmental modifications, so far, mainly in aquatic systems. We tested how different seawater inundation frequencies and cattle grazing, which both disturbed and impacted the productivity of a terrestrial system, a salt marsh, affected the size structure of soil fauna communities, expressed by their DBM relationship. We hypothesized that either: (1) all the trophic levels of soil fauna would benefit from higher productivity (i.e., amount of litter mass), reflected by a higher Y-intercept of the DBM relationship; (2) only smaller animals would benefit, reflected by a lower slope of the relationship; (3) or only larger animals would benefit, reflected by a higher slope of the relationship. We collected a large range of soil fauna from different elevation levels in grazed and ungrazed areas, thence subjected to different levels of productivity, represented by litter mass, with the most inundated and grazed area as the least productive one. Considering that pore size must be smaller in inundated and grazed areas, productivity seemed to be a greater factor influencing species distribution than soil structure. We found slopes lower than-0.75, showing that large animals dominated the community. However, a difference between the DBM relationships of the most and least frequently inundated ungrazed sites indicated that higher productivity benefited the smaller animals. Our findings show that high productivity does not equally affect the different trophic levels of this soil fauna community, suggesting inefficient transfers of energy from one trophic level to another, as smaller species benefitted more from higher productivity. \u00a9 2014 Elsevier Ltd.", "keywords": ["population-density", "0106 biological sciences", "abundance", "plant-species richness", "rain-forest", "size relationships", "energetic equivalence rule", "intermediate disturbance hypothesis", "15. Life on land", "01 natural sciences", "forest mull", "salt-marsh", "13. Climate action", "food webs", "SDG 14 - Life Below Water"]}, "links": [{"href": "https://doi.org/10.1016/j.soilbio.2014.02.003"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20Biology%20and%20Biochemistry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.soilbio.2014.02.003", "name": "item", "description": "10.1016/j.soilbio.2014.02.003", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.soilbio.2014.02.003"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-05-01T00:00:00Z"}}, {"id": "10.1080/00438243.2021.1891963", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:18:45Z", "type": "Journal Article", "created": "2021-03-23", "title": "European agricultural terraces and lynchets: from archaeological theory to heritage management", "description": "Terraces are highly productive, culturally distinctive socioecological systems. Although they form part of time/place-specific debates, terraces per se have been neglected - fields on slopes or landscape elements. We argue that this is due to mapping and dating problems, and lack of artefacts/ecofacts. However, new techniques can overcome some of these constraints, allowing us to re-engage with theoretical debates around agricultural intensification. Starting from neo-Broserupian propositions, we can engage with the sociopolitical and environmental aspects of terrace emergence, maintenance and abandonment. Non-reductionist avenues include identifying and dating different phases of development within single terrace systems, identifying a full crop-range, and other activities not generally associated with terraces (e.g. metallurgy). The proposition here is that terraces are a multi-facetted investment that includes both intensification and diversification and can occur under a range of social conditions but which constitutes a response to demographic pressure in the face to fluctuating environmental conditions.", "keywords": ["2. Zero hunger", "550", "11. Sustainability", "VDP::Humanities: 000::Archeology: 090", "0601 history and archaeology", "Articles", "06 humanities and the arts", "VDP::Humaniora: 000::Arkeologi: 090", "15. Life on land", "Agricultural intensification; agricultural sustainability; landscape change; population density; remote sensing; terrace classification"]}, "links": [{"href": "https://eprints.whiterose.ac.uk/172476/1/European_agricultural_terraces_and_lynchets_from_archaeological_theory_to_heritage_management.pdf"}, {"href": "https://www.research.unipd.it/bitstream/11577/3390089/5/Brown%20et%20al.%20%282020%29.pdf"}, {"href": "https://eprints.soton.ac.uk/448979/1/European_agricultural_terraces_and_lynchets_from_archaeological_theory_to_heritage_management.pdf"}, {"href": "https://www.tandfonline.com/doi/pdf/10.1080/00438243.2021.1891963"}, {"href": "https://doi.org/10.1080/00438243.2021.1891963"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/World%20Archaeology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1080/00438243.2021.1891963", "name": "item", "description": "10.1080/00438243.2021.1891963", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1080/00438243.2021.1891963"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-08-07T00:00:00Z"}}, {"id": "10.1016/j.still.2008.10.012", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:17:32Z", "type": "Journal Article", "created": "2008-12-07", "title": "Controlled Traffic Farming With No Tillage For Improved Fallow Water Storage And Crop Yield On The Chinese Loess Plateau", "description": "On the semi-arid Loess Plateau of northern China, water is typically the biggest constraint to rainfed wheat production. Controlled traffic, combined with zero tillage and residue cover has been proposed to improve soil water, crop yield and water use efficiency. From 1998 to 2005, we conducted a field experiment comparing the water storage and wheat productivity of controlled traffic farming and conventional tillage farming. Three treatments were studied: controlled traffic with no tillage and full residue cover (NTCN), controlled traffic with shallow tillage and full residue cover (STCN) and random traffic with traditional tillage and partial residue cover (CT). Compared to CT, the controlled traffic treatments significantly reduced soil bulk density in 10-20 cm soil layer, significantly increased soil water content in the 0-150 cm soil profile at sowing, 9.3% for NTCN, 9.6% for STCN. These effects were greater in dry seasons, thus reducing the yearly variation in water conservation. Consequently, mean wheat yield of NTCN, STCN and CT were 3.25, 3.27 and 3.05 t ha-1, respectively, in which controlled traffic treatments increased by 6.9% with less yearly variation, compared to traditional tillage. Furthermore, controlled traffic had greater economic benefits than conventional tillage. Within controlled traffic treatments, NTCN showed better overall performance. In conclusion, controlled traffic farming has a better performance with respect to conserving water, improves yields and increases economic benefits. No tillage controlled traffic farming appears to be a solution to the water problem facing farmers on the Loess Plateau of China.", "keywords": ["macropore density", "0106 biological sciences", "2. Zero hunger", "Yields", "bulk density", "571", "available water capacity", "Fallow water storage", "1904 Earth-Surface Processes", "permanent beds", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "6. Clean water", "Zero tillage", "Vertosol", "Controlled traffic", "controlled traffic", "0401 agriculture", " forestry", " and fisheries", "compaction", "1102 Agronomy and Crop Science", "amelioration", "zero tillage", "1111 Soil Science"]}, "links": [{"href": "https://doi.org/10.1016/j.still.2008.10.012"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20and%20Tillage%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.still.2008.10.012", "name": "item", "description": "10.1016/j.still.2008.10.012", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.still.2008.10.012"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2009-06-01T00:00:00Z"}}, {"id": "10.1051/forest/2009083", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:18:29Z", "type": "Journal Article", "created": "2009-12-23", "title": "Effects Of Stand Density On Ecosystem Properties Of Subalpine Forests In The Southern Rocky Mountains, Usa", "description": "Open AccessMixed coniferous, subalpine forest communities in the Rocky Mountains are historically dense and have experienced infrequent, high-severity fire. However, many of these high-elevation stands are thinned for a number of perceived benefits.* We explored the effects of forest stand density on ecosystem properties in subalpine forests in Colorado, USA, 17-18 y after forests were managed for timber.* Forest structure significantly altered the composition and chemical signature of plant communities. Previously managed stands contained lower density of overstory trees and higher ground cover compared to paired reference stands. Foliar phenolic concentration of several species was negatively related to basal area of overstory trees. Furthermore, reductions in stand density increased total foliar phenolic:nitrogen ratios in some species, suggesting that gap formation may drive long-term changes in litter quality. Despite significant changes in forest structure, reductions in stand density did not leave a strong legacy in surface soil properties, likely due to the integrity of soil organic matter reserves.* Changes in forest structure associated with past management has left a long-term impact on plant communities but has only subtly altered soil nutrient cycling, possibly due to trade offs between litter decomposability and microclimate associated with reductions in canopy cover.", "keywords": ["cycle de l'azote du sol", "0106 biological sciences", "biog\u00e9ochimie", "biogeochemistryThis study was conducted in the humid forest zone of Cameroon, in 2002 and 2003. The main objective was to investigate the effects of intercropping on infestation levels and parasitism of the noctuid maize stem borer Busseola fusca Fuller. Two trials were planted per year, one during the long and one during the short rainy season. Maize monocrops were compared with maize/legume or maize/cassava intercrops in two spatial arrangements: maize on alternate hills or in alternate rows. Spatial analyses showed that the stemborer egg batches were regularly dispersed in the maize monocrop and aggregated in the intercrops, as indicated by b, the index of dispersion of Taylor's power law. Depending on the crop association and planting pattern, intercrops reduced the percentage of plants with stem borer eggs by 47.4\uffe2\uff80\uff9358.4% and egg densities by 41.2\uffe2\uff80\uff9354.5% compared to monocropped maize. Consequently, larval densities were 44.4\uffe2\uff80\uff9361.5% lower in intercrops compared to monocrops. Intercropping maize with non-host plants did not affect larval parasitism. Up to two-fold higher levels of egg parasitism by scelionid Telenomus spp. were recorded in inter- compared to monocrops during the short rainy seasons of 2002 and 2003. No differences were found among the mixed cropping treatments and parasitism was lower during the long compared to the short rainy seasons. It was proposed that differences in levels of parasitism were due to density dependence effects rather than the effect of the presence of non-host plants in the system.
", "keywords": ["Crops", " Agricultural", "Population Density", "2. Zero hunger", "0106 biological sciences", "Tropical Climate", "Wasps", "Agriculture", "Moths", "15. Life on land", "Zea mays", "01 natural sciences", "Larva", "Linear Models", "Animals", "Cameroon", "Seasons", "Ovum"], "contacts": [{"organization": "A. Chabi-Olaye, Christian Nolte, Christian Borgemeister, Fritz Schulthess,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1079/ber2004347"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Bulletin%20of%20Entomological%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1079/ber2004347", "name": "item", "description": "10.1079/ber2004347", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1079/ber2004347"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-04-01T00:00:00Z"}}, {"id": "10.1111/j.1365-2389.2006.00798.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:19:28Z", "type": "Journal Article", "created": "2006-03-24", "title": "Soil Susceptibility To Compaction By Wheeling As A Function Of Some Properties Of A Silty Soil As Affected By The Tillage System", "description": "SummaryThe recent increase in conservation tillage offers the possible benefit of decreasing soil compaction risk by wheeling. Excessive compaction has damaging consequences for agriculture and the environment. Direct drilling is likely to change soil porosity and soil carbon content in the long term. This paper analyses the effect of both of these factors on soil mechanical strength through measurements of the compression index Cc, the swelling index Cs, and the pre\uffe2\uff80\uff90compression stress pc*. Oedometer tests were performed on remoulded soils taken from an experiment with a wheat\uffe2\uff80\uff90maize rotation, where three soil tillage systems were compared over 31 years: annual mouldboard ploughing, superficial tillage (10\uffe2\uff80\uff83cm depth), and no tillage. The results show that initial structural porosity (i.e. macro\uffe2\uff80\uff90porosity) increased Cc slightly and decreased pc* exponentially. Consequently, the risk of compaction in the direct drilling systems should decrease when a decrease in soil porosity is found, compared with conventional systems. However, this change in soil porosity in direct drilling is not always observed. The other variables that can be influenced by tillage system, i.e. carbon content or soil moisture, have also been examined to assess the possible benefit of direct drilling on soil compaction risk. For soils with similar initial structural porosity, our results show that the increase in carbon content of the superficial soil layers in direct drilling systems tends to increase the soil\uffe2\uff80\uff99s susceptibility to compaction by increasing Cc in wet conditions and by decreasing pc* in dry conditions. Moisture conditions at wheeling determine the degree of soil compaction as a function of tillage system.
Sensibilit\uffc3\uffa9 des sols au tassement par les engins agricoles: analyse de l\uffe2\uff80\uff99effet du travail du sol pour un sol limoneux
R\uffc3\uffa9sum\uffc3\uffa9L\uffe2\uff80\uff99adoption croissante du semis direct pourrait permettre de diminuer le risque de tassement des sols lors du passage des engins agricoles. Les tassements s\uffc3\uffa9v\uffc3\uffa8res du sol ont des cons\uffc3\uffa9quences importantes sur l\uffe2\uff80\uff99environnement et l\uffe2\uff80\uff99agriculture. A long\uffe2\uff80\uff90terme, la technique du semis direct modifie la porosit\uffc3\uffa9 et la teneur en carbone du sol. Cet article propose de quantifier l\uffe2\uff80\uff99effet de ces deux facteurs sur la r\uffc3\uffa9sistance m\uffc3\uffa9caniques du sol par des mesures de l\uffe2\uff80\uff99indice de compression Cc, de l\uffe2\uff80\uff99indice recompression Cs et de la pression de preconsolidation pc*. Des essais oedom\uffc3\uffa9triques ont \uffc3\uffa9t\uffc3\uffa9 r\uffc3\uffa9alis\uffc3\uffa9s sur des \uffc3\uffa9chantillons de sols remani\uffc3\uffa9s (sol limoneux) pr\uffc3\uffa9lev\uffc3\uffa9s sur un essai comparant trois syst\uffc3\uffa8mes de travail du sol depuis 31 ans pour une rotation bl\uffc3\uffa9/ma\uffc3\uffafs: labour, travail superficiel (10\uffe2\uff80\uff83cm), semis direct. Les r\uffc3\uffa9sultats montrent que la macroporosit\uffc3\uffa9 appel\uffc3\uffa9e porosit\uffc3\uffa9 structurale du sol induit une faible augmentation de Cc et une d\uffc3\uffa9croissance exponentielle de pc*. Ceci doit diminuer le risque de tassement dans les syst\uffc3\uffa8mes o\uffc3\uffb9 le semis direct s\uffe2\uff80\uff99accompagne d\uffe2\uff80\uff99une r\uffc3\uffa9duction de la porosit\uffc3\uffa9. Cette \uffc3\uffa9volution de la porosit\uffc3\uffa9 en semis direct n\uffe2\uff80\uff99est cependant pas syst\uffc3\uffa9matique. L\uffe2\uff80\uff99effet des autres facteurs doit \uffc3\uffaatre consid\uffc3\uffa9r\uffc3\uffa9, \uffc3\uffa0 savoir teneur en eau et teneur en carbone. Nos r\uffc3\uffa9sultats montrent que pour des sols de m\uffc3\uffaame porosit\uffc3\uffa9 structurale, l\uffe2\uff80\uff99augmentation de la teneur en carbone des horizons superficiels dans les syst\uffc3\uffa8mes en semis direct a tendance \uffc3\uffa0 augmenter la sensibilit\uffc3\uffa9 du sol au tassement par une augmentation Cc en conditions humides et une diminution de pc* en conditions s\uffc3\uffa8ches. Les conditions hydriques d\uffe2\uff80\uff99intervention ont donc un effet d\uffc3\uffa9terminant sur la sensibilit\uffc3\uffa9 du sol au tassement selon les modalit\uffc3\uffa9s de travail du sol.
", "keywords": ["WATER-CONTENT", "2. Zero hunger", "UNIAXIAL COMPACTION", "POROSITY", "04 agricultural and veterinary sciences", "15. Life on land", "INDICE DE COMPRESSION", "6. Clean water", "ORGANIC-MATTER", "HYDRAULIC-PROPERTIES", "DENSITY", "STRENGTH", "0401 agriculture", " forestry", " and fisheries", "COMPRESSION", "AGRICULTURAL SOILS", "ARABLE SOILS", "[SDV.SA.SDS] Life Sciences [q-bio]/Agricultural sciences/Soil study"]}, "links": [{"href": "https://doi.org/10.1111/j.1365-2389.2006.00798.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/European%20Journal%20of%20Soil%20Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1365-2389.2006.00798.x", "name": "item", "description": "10.1111/j.1365-2389.2006.00798.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-2389.2006.00798.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2007-01-31T00:00:00Z"}}, {"id": "10.1093/jee/98.2.384", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:18:58Z", "type": "Journal Article", "created": "2015-01-13", "title": "Influence Of Maize/Lablab Intercropping On Lepidopterous Stem Borer Infestation In Maize", "description": "Lepidopterous stem borers seriously affect production of maize, Zea mays L., in sub-Saharan Africa. Intercropping maize with legumes such as lablab, Lablab purpurens (L.), is one of the effective systems to control stem borers. Sole culture maize and maize/lablab intercrop system of different lablab densities were planted at two locations to investigate the effects of intercrop system on incidence and severity of stem borers with particular reference to Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae). Stem borer infestation was found to be more severe in sole culture maize than maize in maize/lablab intercrop. There was a significantly negative relationship between lablab densities and maize grain yields, suggesting a possible competition for resources between the two crops. It was concluded that density of lablab and date of planting of lablab in maize/lablab intercropping have significant affects on stem borer populations and maize grain yields.", "keywords": ["Lepidoptera", "Population Density", "0106 biological sciences", "2. Zero hunger", "Animals", "0401 agriculture", " forestry", " and fisheries", "Agriculture", "Fabaceae", "04 agricultural and veterinary sciences", "15. Life on land", "Insect Control", "Zea mays", "01 natural sciences"]}, "links": [{"href": "https://doi.org/10.1093/jee/98.2.384"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Economic%20Entomology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1093/jee/98.2.384", "name": "item", "description": "10.1093/jee/98.2.384", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1093/jee/98.2.384"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-04-01T00:00:00Z"}}, {"id": "10.1093/treephys/tpq080", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:19:01Z", "type": "Journal Article", "created": "2010-10-18", "title": "Green Spruce Aphid Infestations Cause Larger Growth Reductions To Sitka Spruce Under Shade", "description": "Light availability and infestation by the green spruce aphid (Elatobium abietinum) are key factors affecting the growth of Sitka spruce (Picea sitchensis) seedlings under a mature tree canopy, but their combined effect on seedling growth has not previously been quantified. A controlled outdoor experiment in which light levels (high light (HL): 100%, intermediate light (IL): 24%) and aphid infestation (absence/presence) were manipulated was conducted over 2 years to look at the effects on seedling growth and biomass distribution patterns. Aphid population assessments showed a significantly increased population density under IL, with three to four times higher cumulative aphid densities than that under HL. Defoliation rates of infested seedlings were directly related to aphid density. Total seedling biomass was strongly reduced in IL, and aphid infestation caused additional reductions in the biomass of particular components of the seedlings. Dry weight (DW) of older (\u22651-year-old) needles in infested trees was significantly decreased in both years. Total root DW at the end of the second year was significantly affected by aphid infestation, and the reduction (14-18%) was similar in IL and HL treatments despite large differences in aphid density. Biomass distribution patterns in infested trees were similar to that of uninfested trees within each light treatment, indicating that the relative decreases in root biomass were accompanied by similar reductions in distribution to the above-ground parts of the seedlings. Leader extension growth of infested seedlings was reduced by 15-17% compared with uninfested seedlings under IL, whereas only a 2-3% reduction in leader extension of infested seedlings under HL was observed. The results showed that the response of seedlings to E. abietinum were primarily dependent on the light environment. The significant reduction caused by aphids on the total DW of older needles and roots, and on leader extension growth, does suggest the potential for effects to accumulate over time.", "keywords": ["Population Density", "0106 biological sciences", "Time Factors", "Light", "15. Life on land", "Plant Roots", "01 natural sciences", "Host-Parasite Interactions", "Plant Leaves", "Seedlings", "13. Climate action", "Aphids", "Animals", "Biomass", "Picea", "Ecosystem"]}, "links": [{"href": "https://doi.org/10.1093/treephys/tpq080"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Tree%20Physiology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1093/treephys/tpq080", "name": "item", "description": "10.1093/treephys/tpq080", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1093/treephys/tpq080"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-10-12T00:00:00Z"}}, {"id": "44546066-980b-451c-84b0-d01be3da4064", "type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[5.81, 47.26], [5.81, 54.76], [15.77, 54.76], [15.77, 47.26], [5.81, 47.26]]]}, "properties": {"themes": [{"concepts": [{"id": "biota"}], "scheme": "https://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_TopicCategoryCode"}, {"concepts": [{"id": "Soil"}, {"id": "soil density"}, {"id": "density"}, {"id": "soil chemicophysical properties"}, {"id": "earthworms"}, {"id": "soil organisms"}, {"id": "soil compaction"}, {"id": "soil porosity"}, {"id": "soil properties"}, {"id": "soil structure"}, {"id": "soil fauna"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}, {"concepts": [{"id": "opendata"}], "scheme": "Individual"}, {"concepts": [{"id": "Boden"}], "scheme": "GEMET - INSPIRE themes, version 1.0"}], "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the BonaRes Centre's research activities.\"\n\nAlthough every care has been taken in preparing and testing the data, the BonaRes Centre and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the BonaRes Centre and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The BonaRes Centre and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2020-12-08", "type": "Dataset", "created": "2020-09-29", "language": "eng", "title": "Effects of earthworms on bulk density: A meta\u2010analysis", "description": "Using meta-analysis, we quantified earthworm effects on bulk density and investigated the influence of driving factors (Lang, B. & Russell, D.J. Eur J Soil Sci. (2020) 71: 80\u2013 83. https://doi.org/10.1111/ejss.12846). We compiled data from 22 articles, yielding 111 data points. In the supplementary data file, we give information on geographical location, climate, soils (soil type, soil texture, organic carbon, pH), experimental details (laboratory or field experiment, natural soil structure or repacked soil, mesocosm and sampling depth, experimental duration, land use, treatment, replication, initial bulk density), organisms (species or higher taxon, earthworm ecological group, mean individual mass, biomass, abundance), and results (bulk density and standard deviation for fauna and control treatments).\n\nResearch domain: Other\n\nResearch question: We estimated taxon-specific impacts on bulk density, whether general earthworm effects depended on ecological groups, earthworm body mass, abundance, soil texture, land use or experimental duration. Furthermore, we assessed whether earthworms are able to counteract soil compaction.", "keywords": ["Soil", "soil density", "density", "soil chemicophysical properties", "earthworms", "soil organisms", "soil compaction", "soil porosity", "soil properties", "soil structure", "soil fauna", "opendata", "Boden"], "contacts": [{"name": "Birgit Lang", "organization": "Senckenberg Museum of Natural History G\u00f6rlitz", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "birgit.lang@senckenberg.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "David J. Russell", "organization": "Senckenberg Museum of Natural History G\u00f6rlitz", "position": null, "roles": ["projectLeader"], "phones": [{"value": null}], "emails": [{"value": "david.russell@senckenberg.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "BonaRes Data Centre", "organization": "Leibniz Centre for Agricultural Landscape Research (ZALF)", "position": "Research Platform 'Data Analysis & Simulation' - WG Geodata", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 171"}], "emails": [{"value": "bonares-datenzentrum@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": null}]}, {"name": "David J. Russell", "organization": "Senckenberg Museum of Natural History G\u00f6rlitz", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "david.russell@senckenberg.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"organization": "Senckenberg Museum of Natural History G\u00f6rlitz", "roles": ["contributor"]}]}, "links": [{"href": "https://doi.org/10.1111/ejss.12846", "rel": "download"}, {"href": "https://maps.bonares.de/mapapps/resources/apps/bonares/index.html?lang=en&mid=44546066-980b-451c-84b0-d01be3da4064", "rel": "information"}, {"href": "https://metadata.bonares.de:443/smartEditor/preview/Lang_Graphic_overview.png", "name": "preview", "description": "Web image thumbnail (URL)", "protocol": "WWW:LINK-1.0-http--image-thumbnail", "rel": "preview"}, {"rel": "self", "type": "application/geo+json", "title": "44546066-980b-451c-84b0-d01be3da4064", "name": "item", "description": "44546066-980b-451c-84b0-d01be3da4064", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/44546066-980b-451c-84b0-d01be3da4064"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-12-08T00:00:00Z"}}, {"id": "10.1111/gcb.14815", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:19:22Z", "type": "Journal Article", "created": "2019-08-30", "title": "How to measure, report and verify soil carbon change to realize the potential of soil carbon sequestration for atmospheric greenhouse gas removal", "description": "AbstractThere is growing international interest in better managing soils to increase soil organic carbon (SOC) content to contribute to climate change mitigation, to enhance resilience to climate change and to underpin food security, through initiatives such as international \uffe2\uff80\uff984p1000\uffe2\uff80\uff99 initiative and the FAO's Global assessment of SOC sequestration potential (GSOCseq) programme. Since SOC content of soils cannot be easily measured, a key barrier to implementing programmes to increase SOC at large scale, is the need for credible and reliable measurement/monitoring, reporting and verification (MRV) platforms, both for national reporting and for emissions trading. Without such platforms, investments could be considered risky. In this paper, we review methods and challenges of measuring SOC change directly in soils, before examining some recent novel developments that show promise for quantifying SOC. We describe how repeat soil surveys are used to estimate changes in SOC over time, and how long\uffe2\uff80\uff90term experiments and space\uffe2\uff80\uff90for\uffe2\uff80\uff90time substitution sites can serve as sources of knowledge and can be used to test models, and as potential benchmark sites in global frameworks to estimate SOC change. We briefly consider models that can be used to simulate and project change in SOC and examine the MRV platforms for SOC change already in use in various countries/regions. In the final section, we bring together the various components described in this review, to describe a new vision for a global framework for MRV of SOC change, to support national and international initiatives seeking to effect change in the way we manage our soils.We examine the influence of climate, soil properties and vegetation characteristics on soil organic carbon (SOC) along a transect of West African ecosystems sampled across a precipitation gradient on contrasting soil types stretching from Ghana (15\uffc2\uffb0N) to Mali (7\uffc2\uffb0N). Our findings derive from a total of 1108 soil cores sampled over 14 permanent plots. The observed pattern in SOC stocks reflects the very different climatic conditions and contrasting soil properties existing along the latitudinal transect. The combined effects of these factors strongly influence vegetation structure. SOC stocks in the first 2\uffc2\uffa0m of soil ranged from 20\uffc2\uffa0Mg\uffc2\uffa0C\uffc2\uffa0ha\uffe2\uff88\uff921 for a Sahelian savanna in Mali to over 120\uffc2\uffa0Mg\uffc2\uffa0C\uffc2\uffa0ha\uffe2\uff88\uff921 for a transitional forest in Ghana. The degree of interdependence between soil bulk density (SBD) and soil properties is highlighted by the strong negative relationships observed between SBD and SOC (r2\uffc2\uffa0>\uffc2\uffa00.84). A simple predictive function capable of encompassing the effect of climate, soil properties and vegetation type on SOC stocks showed that available water and sand content taken together could explain 0.84 and 0.86 of the total variability in SOC stocks observed to 0.3 and 1.0\uffc2\uffa0m depth respectively. Used in combination with a suitable climatic parameter, sand content is a good predictor of SOC stored in highly weathered dry tropical ecosystems with arguably less confounding effects than provided by clay content. There was an increased contribution of resistant SOC to the total SOC pool for lower rainfall soils, this likely being the result of more frequent fire events in the grassier savannas of the more arid regions. This work provides new insights into the mechanisms determining the distribution of carbon storage in tropical soils and should contribute significantly to the development of robust predictive models of biogeochemical cycling and vegetation dynamics in tropical regions.
", "keywords": ["550", "Tropical ecosystems", "biotic controls", "West africa", "01 natural sciences", "forest soils", "land-use change", "Precipitation gradient", "Soil bulk density", "senegal", "cycle feedback", "Life Science", "Resistant organic carbon", "organic-matter", "0105 earth and related environmental sciences", "2. Zero hunger", "info:eu-repo/classification/ddc/550", "savanna soils", "ddc:550", "Soil organic carbon", "sequestration", "04 agricultural and veterinary sciences", "15. Life on land", "stabilization", "Earth sciences", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "texture", "Soil carbon stocks"]}, "links": [{"href": "https://doi.org/10.1111/j.1365-2486.2012.02657.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Change%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1365-2486.2012.02657.x", "name": "item", "description": "10.1111/j.1365-2486.2012.02657.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-2486.2012.02657.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-03-02T00:00:00Z"}}, {"id": "10.1111/j.1461-0248.2010.01486.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:19:38Z", "type": "Journal Article", "created": "2010-05-12", "title": "Introduced Grazers Can Restrict Potential Soil Carbon Sequestration Through Impacts On Plant Community Composition", "description": "Ecology Letters(2010) 13: 959\uffe2\uff80\uff93968
AbstractGrazing occurs over a third of the earth\uffe2\uff80\uff99s land surface and may potentially influence the storage of 109Mg\uffe2\uff80\uff83year\uffe2\uff88\uff921of greenhouse gases as soil C. Displacement of native herbivores by high densities of livestock has often led to overgrazing and soil C loss. However, it remains unknown whether matching livestock densities to those of native herbivores can yield equivalent soil C sequestration. In the Trans\uffe2\uff80\uff90Himalayas we found that, despite comparable grazing intensities, watersheds converted to pastoralism had 49% lower soil C than watersheds which retain native herbivores. Experimental grazer\uffe2\uff80\uff90exclusion within each watershed type, show that this difference appears to be driven by indirect effects of livestock diet selection, leading to vegetation shifts that lower plant production and reduce likely soil C inputs from vegetation byc.25\uffe2\uff80\uff83gC\uffe2\uff80\uff83m\uffe2\uff88\uff922\uffe2\uff80\uff83year\uffe2\uff88\uff921. Our results suggest that while accounting for direct impacts (stocking density) is a major step, managing indirect impacts on vegetation composition are equally important in influencing soil C sequestration in grazing ecosystems.
", "keywords": ["2. Zero hunger", "Greenhouse Effect", "Population Density", "0106 biological sciences", "Plant Development", "Biodiversity", "Feeding Behavior", "15. Life on land", "Models", " Biological", "01 natural sciences", "Carbon", "Diet", "Soil", "13. Climate action", "Animals", " Domestic", "Animals", "Ecosystem"], "contacts": [{"organization": "Sumanta Bagchi, Mark E. Ritchie,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1111/j.1461-0248.2010.01486.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecology%20Letters", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1461-0248.2010.01486.x", "name": "item", "description": "10.1111/j.1461-0248.2010.01486.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1461-0248.2010.01486.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-07-14T00:00:00Z"}}, {"id": "10.1111/mec.14358", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:19:47Z", "type": "Journal Article", "created": "2017-09-19", "title": "Speciation below ground: Tempo and mode of diversification in a radiation of endogean ground beetles", "description": "AbstractDispersal is a critical factor determining the spatial scale of speciation, which is constrained by the ecological characteristics and distribution of a species\uffe2\uff80\uff99 habitat and the intrinsic traits of species. Endogean taxa are strongly affected by the unique qualities of the below\uffe2\uff80\uff90ground environment and its effect on dispersal, and contrasting reports indicate either high dispersal capabilities favoured by small body size and mediated by passive mechanisms, or low dispersal due to restricted movement and confinement inside the soil. We studied a species\uffe2\uff80\uff90rich endogean ground beetle lineage, Typhlocharina, including three genera and more than 60 species, as a model for the evolutionary biology of dispersal and speciation in the deep soil. A time\uffe2\uff80\uff90calibrated molecular phylogeny generated from >400 individuals was used to delimit candidate species, to study the accumulation of lineages through space and time by species\uffe2\uff80\uff93area\uffe2\uff80\uff93age relationships and to determine the geographical structure of the diversification using the relationship between phylogenetic and geographic distances across the phylogeny. Our results indicated a small spatial scale of speciation in Typhlocharina and low dispersal capacity combined with sporadic long distance, presumably passive dispersal events that fuelled the speciation process. Analysis of lineage growth within Typhlocharina revealed a richness plateau correlated with the range of distribution of lineages, suggesting a long\uffe2\uff80\uff90term species richness equilibrium mediated by density dependence through limits of habitat availability. The interplay of area\uffe2\uff80\uff90 and age\uffe2\uff80\uff90dependent processes ruling the lineage diversification in Typhlocharina may serve as a general model for the evolution of high species diversity in endogean mesofauna.Over the last two decades, grazing intensity has increased in the temperate salt marshes of Samboromb\uffc3\uffb3n Bay (Argentina) due to agricultural expansion and the displacement of domestic livestock to these areas. We investigated the effect of cattle grazing on soil chemical and physical properties in the higher (HE), medium (ME) and lower (LE) elevation levels of this temperate salt marsh. Soil data were collected from both a National Park, where cattle grazing has been excluded for more than 35\uffc2\uffa0yrs, and an adjacent commercial livestock farm continuously grazed by cattle. We found that soil salinity was greater on the grazed than on the ungrazed sites, especially those in theMEandLE. This could be related to the upward flow of salts from the saline groundwater, driven by the increase in the proportion of bare soil on grazed sites. The increase in soil salinity changed the plant community structure through the increase of salt\uffe2\uff80\uff90tolerant and non\uffe2\uff80\uff90palatable species and the decrease of palatable species. Soil physical variables (soil bulk density and soil bearing capacity) were also higher on the grazed than on the ungrazed sites, which can be related to the decrease in soil organic matter (SOM), and suggest an incipient compaction process; however, the values were still lower than those considered critical for plant growth in clay soils. These results suggest that continuous grazing management in this temperate salt marsh might have negative consequences for animal production and ecosystem conservation, mainly related to the increased soil salinity. Further research will be necessary to evaluate the suitability of switching to intermittent grazing management.
", "keywords": ["2. Zero hunger", "Salinity", "Bearing Capacity", "Compaction", "Cattle Grazing", "04 agricultural and veterinary sciences", "15. Life on land", "https://purl.org/becyt/ford/4.5", "13. Climate action", "Salt Marsh Soils", "Soil Bulk Density", "0401 agriculture", " forestry", " and fisheries", "https://purl.org/becyt/ford/4", "14. Life underwater"]}, "links": [{"href": "https://doi.org/10.1111/sum.12176"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20Use%20and%20Management", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/sum.12176", "name": "item", "description": "10.1111/sum.12176", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/sum.12176"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-03-04T00:00:00Z"}}, {"id": "10.1126/science.aal1727", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:19:53Z", "type": "Journal Article", "created": "2017-05-26", "title": "Satellites reveal contrasting responses of regional climate to the widespread greening of Earth", "description": "Increasing terrestrial biomass has important impacts on the climate that affects it.
", "keywords": ["Population Density", "Satellite Imagery", "Multidisciplinary", "Time Factors", "Climate", "Climate Change", "Temperature", "Biophysical Phenomena; Climate Change; Population Density; Sunlight; Temperature; Time Factors; Climate; Models", " Theoretical; Plant Physiological Phenomena; Satellite Imagery", "Models", " Theoretical", "15. Life on land", "01 natural sciences", "Biophysical Phenomena", "13. Climate action", "Sunlight", "European Commission", "Plant Physiological Phenomena", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1126/science.aal1727"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1126/science.aal1727", "name": "item", "description": "10.1126/science.aal1727", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1126/science.aal1727"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-06-16T00:00:00Z"}}, {"id": "10.1155/2014/437283", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:20:01Z", "type": "Journal Article", "created": "2014-08-14", "title": "Effect Of Tillage Practices On Soil Properties And Crop Productivity In Wheat-Mungbean-Rice Cropping System Under Subtropical Climatic Conditions", "description": "This study was conducted to know cropping cycles required to improve OM status in soil and to investigate the effects of medium-term tillage practices on soil properties and crop yields in Grey Terrace soil of Bangladesh under wheat-mungbean-T.amancropping system. Four different tillage practices, namely, zero tillage (ZT), minimum tillage (MT), conventional tillage (CT), and deep tillage (DT), were studied in a randomized complete block (RCB) design with four replications. Tillage practices showed positive effects on soil properties and crop yields. After four cropping cycles, the highest OM accumulation, the maximum root mass density (0\uffe2\uff80\uff9315\uffe2\uff80\uff89cm soil depth), and the improved physical and chemical properties were recorded in the conservational tillage practices. Bulk and particle densities were decreased due to tillage practices, having the highest reduction of these properties and the highest increase of porosity and field capacity in zero tillage. The highest total N, P, K, and S in their available forms were recorded in zero tillage. All tillage practices showed similar yield after four years of cropping cycles. Therefore, we conclude that zero tillage with 20% residue retention was found to be suitable for soil health and achieving optimum yield under the cropping system in Grey Terrace soil (Aeric Albaquept).
", "keywords": ["No-till farming", "Technology", "Climate", "Cropping", "Mulch-till", "Crop", "Plant Roots", "Agricultural and Biological Sciences", "Soil", "Management of Soil Fertility and Crop Productivity", "Soil water", "Triticum", "2. Zero hunger", "Bangladesh", "Minimum tillage", "Soil Physical Properties", "Ecology", "T", "Q", "Soil Quality", "R", "Life Sciences", "Fabaceae", "Phosphorus", "Agriculture", "04 agricultural and veterinary sciences", "6. Clean water", "Soil Compaction", "Medicine", "Research Article", "Crops", " Agricultural", "Nitrogen", "Science", "Soil Science", "Soil fertility", "Crop Productivity", "Environmental science", "Tillage", "Randomized block design", "FOS: Mathematics", "Crop yield", "Particle Size", "Biology", "Soil science", "Analysis of Variance", "Soil Fertility", "Effects of Soil Compaction on Crop Production", "Conventional tillage", "Oryza", "15. Life on land", "Agronomy", "Bulk density", "FOS: Biological sciences", "Potassium", "0401 agriculture", " forestry", " and fisheries", "Soil Carbon Dynamics and Nutrient Cycling in Ecosystems", "Sulfur", "Mathematics", "Cropping system"]}, "links": [{"href": "https://doi.org/10.1155/2014/437283"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/The%20Scientific%20World%20Journal", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1155/2014/437283", "name": "item", "description": "10.1155/2014/437283", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1155/2014/437283"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-01-01T00:00:00Z"}}, {"id": "10.14214/sf.10050", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:20:18Z", "type": "Journal Article", "created": "2019-03-15", "title": "Modelling soil moisture \u2013 soil strength relationship of fine-grained upland forest soils", "description": "The least limiting water range (LLWR) and degree of compactness (DC) can be useful indicators of soil physical quality and crop yield. This study focused on assessing of LLWR, DC and evaluation of critical values to crop growth of an Alfisol and Oxisol under no-till management. Undisturbed soil cores were taken from the layer 0.00 - 0.20 m depth. Soil water retention curve, soil penetration resistance curve, air-filled porosity and bulk density (Bd) were measured. The range of LLWR variation was limited by volumetric water content at field capacity and penetration resistance. Values of LLWR varied from 0.00 - 0.14 m3 m-3 to Alfisol and 0.00 - 0.04 m3 m-3 to Oxisol. The critical values of the Bd and DC for crop development were 1.79 Mg m-3 and 1.35 Mg m-3 and 96% and 74% to Alfisol and Oxisol, respectively. Further researches relating LLWR, DC and crop response are still required in soils with different conditions and management.
", "keywords": ["2. Zero hunger", "bulk density", "porosity", "soil strength", "S", "QH301-705.5", "Soil strength", "Agriculture", "04 agricultural and veterinary sciences", "15. Life on land", "Soil quality", "Bulk density", "0401 agriculture", " forestry", " and fisheries", "soil quality", "Biology (General)", "Porosity"]}, "links": [{"href": "https://doi.org/10.14393/bj-v31n4a2015-26218"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Bioscience%20Journal", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.14393/bj-v31n4a2015-26218", "name": "item", "description": "10.14393/bj-v31n4a2015-26218", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.14393/bj-v31n4a2015-26218"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-06-30T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=DENSITY&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=DENSITY&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=DENSITY&", "hreflang": "en-US"}, {"rel": "next", "type": "application/geo+json", "title": "items (next)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=DENSITY&offset=50", "hreflang": "en-US"}], "numberMatched": 179, "numberReturned": 50, "distributedFeatures": [], "timeStamp": "2026-04-16T22:23:36.163353Z"}