{"type": "FeatureCollection", "facets": {"type": {"type": "terms", "property": "type", "buckets": [{"value": "Journal Article", "count": 17}]}, "soil_chemical_properties": {"type": "terms", "property": "soil_chemical_properties", "buckets": [{"value": "carbon", "count": 3}, {"value": "soil organic matter", "count": 3}, {"value": "nutrients", "count": 1}, {"value": "soil carbon stocks", "count": 1}, {"value": "soil organic carbon", "count": 1}, {"value": "zinc", "count": 1}, {"value": "cadmium", "count": 1}]}, "soil_biological_properties": {"type": "terms", "property": "soil_biological_properties", "buckets": [{"value": "vegetation", "count": 3}, {"value": "biomass production", "count": 1}]}, "soil_physical_properties": {"type": "terms", "property": "soil_physical_properties", "buckets": [{"value": "hydraulic conductivity", "count": 1}]}, "soil_classification": {"type": "terms", "property": "soil_classification", "buckets": [{"value": "sandy soils", "count": 17}]}, "soil_functions": {"type": "terms", "property": "soil_functions", "buckets": [{"value": "soil fertility", "count": 3}]}, "soil_threats": {"type": "terms", "property": "soil_threats", "buckets": [{"value": "acidification", "count": 2}, {"value": "soil degradation", "count": 1}, {"value": "soil compaction", "count": 1}]}, "soil_processes": {"type": "terms", "property": "soil_processes", "buckets": []}, "soil_management": {"type": "terms", "property": "soil_management", "buckets": [{"value": "cultivation", "count": 1}, {"value": "plant residues", "count": 1}, {"value": "sewage sludge", "count": 1}]}, "ecosystem_services": {"type": "terms", "property": "ecosystem_services", "buckets": []}}, "features": [{"id": "10.1006/jare.1998.0475", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-04-04T16:14:22Z", "type": "Journal Article", "created": "2002-10-07", "title": "Effects Of Livestock Grazing On Physical And Chemical Properties Of Sandy Soils In Sahelian Rangelands", "description": "The effects of grazing by livestock on soil surface features, bulk density and chemical properties were studied at the completion of a 4-year grazing experiment carried out in SadoreH, Niger. Grazing treatments were a factorial arrangement of two stocking rates (62\u00b75 and 125 kg live weight ha~1) and four sheep:goat ratios (0:6, 2:4, 4:2 and 6:0 animals per pasture), with two pastures per treatment and two ungrazed controls. Observations were also made in a fallow subjected to 9 years of intense and uncontrolled mixed grazing, and in a site that had been protected from grazing for 15 years. The topsoil was sampled (at depths of 0\u20132, 2\u20136, 6\u201314 and 14\u201330 cm) below shrub canopy in herbaceous vegetation and in bare soil patches within each of 20 paddocks for determination of pH, organic C, and total N and P concentrations. Soil bulk density was measured in a subset of soil profiles. The areal extent of different types of soil crusts and other soil surface features was assessed in one-half of the paddocks. Grazing resulted in a reduction (p(0\u00b701) and fragmentation of the area of crusted soils. However, this trend was partially compensated for by an increase of newly formed crusts. As a result, the soil infiltration index slightly increased with moderate grazing, but decreased at higher stocking rates. Compaction due to trampling was observed in the topsoil beneath the shrub canopy and also in vegetated patches, but only under intense grazing pressure. Soil bulk density was not affected by grazing except for an increase observed below 10 cm depth at the understorey of shrubs which is therefore unlikely due to trampling. When compared to the ungrazed control, pH, organic C and N concentrations, and to lesser extent P concentration, decreased after 4 years of grazing. Soil P and pH further decreased after 9 years of very high grazing pressure. However, neither N nor organic C decreased further.", "keywords": ["Technology", "570", "Economics", "PH", "630", "PROPRIETE CHIMIQUE", "AZOTE", "sandy soils", "grazing", "2. Zero hunger", "DENSITE", "SURFACE DU SOL", "MATIERE ORGANIQUE", "PATURAGE", "PHOSPHORE", "Production", "ETUDE D'IMPACT", "Agriculture-Farming", "CYCLE D'ELEMENT", "04 agricultural and veterinary sciences", "15. Life on land", "GRANULOMETRIE", "rangelands", "CARBONE ORGANIQUE", "livestock", "soil chemical properties", "BILAN HYDROLOGIQUE", "soil physical properties", "ETUDE EXPERIMENTALE", "0401 agriculture", " forestry", " and fisheries", "soil types", "CROUTE D'ALTERATION"]}, "links": [{"href": "https://doi.org/10.1006/jare.1998.0475"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Arid%20Environments", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1006/jare.1998.0475", "name": "item", "description": "10.1006/jare.1998.0475", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1006/jare.1998.0475"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1999-03-01T00:00:00Z"}}, {"id": "10.1007/s00374-003-0612-7", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-04-04T16:14:36Z", "type": "Journal Article", "created": "2003-10-27", "title": "Effect Of Eisenia Foetida Earthworms On Mineralization Kinetics, Microbial Biomass, Enzyme Activities, Respiration And Labile C Fractions Of Three Soils Treated With A Composted Organic Residue", "description": "Open AccessPeer reviewed", "keywords": ["Microbial metabolic quotient", "2. Zero hunger", "Biomass C", "Clay soils", "C mineralization", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "Sandy soil"]}, "links": [{"href": "https://doi.org/10.1007/s00374-003-0612-7"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Biology%20and%20Fertility%20of%20Soils", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00374-003-0612-7", "name": "item", "description": "10.1007/s00374-003-0612-7", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00374-003-0612-7"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2003-06-01T00:00:00Z"}}, {"id": "10.1007/s004420050619", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-04T16:14:45Z", "type": "Journal Article", "created": "2002-08-25", "title": "Soil Carbon And Nitrogen In A Pine-Oak Sand Plain In Central Massachusetts: Role Of Vegetation And Land-Use History", "description": "Over the last 150 years much of the landscape of eastern North America has been transformed from predominantly agricultural lands to forest. Although cultivation strongly affects important ecosystem processes such as biomass accumulation, soil organic matter dynamics, and nitrogen cycling, recovery of these processes after abandonment is insufficiently understood. We examined soil carbon and nitrogen pools and nitrogen dynamics for 16 plots on a central Massachusetts sand plain, over 80% of which had been cultivated and subsequently abandoned at least 40 years ago. The two youngest old-field forests, located on sites abandoned 40-60 years prior to our sampling, had the lowest mineral soil carbon content (0-15\u2009cm), 31% less than the average of unplowed soils. Soil carbon concentration and loss-on-ignition were significantly higher in unplowed soils than in all plowed soils, but these differences were offset by the higher bulk density in formerly plowed soils, leading to no significant differences in C content between plowed and unplowed soil. Soil C:N ratios were lower in formerly plowed soils (26.2) than in unplowed soils (28.0). While soil N content was not affected by land-use history or vegetation type, net N mineralization showed much greater variation. In situ August net nitrogen mineralization varied nearly 40-fold between stand types: lowest in pitch pine and white pine stands (-0.13 and 0.10\u2009kg\u2009N\u2009ha-1\u200928\u2009day-1), intermediate in scrub oak stands (0.48\u2009kg\u2009N\u2009ha-1\u200928\u2009day-1) and highest in aspen and mixed oak stands (1.34-3.11\u2009kg\u2009N\u2009ha-1\u200928\u2009day-1). Mineralization was more strongly related to present vegetation than to land-use history or soil N content. Appreciable net nitrification was observed only in the most recently abandoned aspen plot (0.82\u2009kg\u2009N\u2009ha-1\u200928\u2009day-1), suggesting that recent disturbance and residual agricultural lime stimulated nitrification. Carbon:nitrogen ratios increased and pH declined with stand age. Higher bulk density, lower loss-on-ignition and C:N ratios, and slightly lower C concentrations in the surface mineral soil are the persistent legacies of agriculture on soil properties. Short-term agricultural use and the low initial C and N concentrations in these sandy soils appear to have resulted in less persistent impacts of agriculture on soil C and N content and N cycling.", "keywords": ["0106 biological sciences", "soil-properties", "Forests", "Environmental-Sciences)", "01 natural sciences", "nitrogen", "variation-", "Soil", "Quercus", "soil-nitrogen", "nitrogen-", "cultivation-", "cycling-", "soil-organic-matter", "vegetation-history", "sandy-soils", "soil-carbon", "2. Zero hunger", "7440-44-0: CARBON", "carbon-", "pines-", "Soil-studies", "land-use-history", "04 agricultural and veterinary sciences", "pine-oak-sand-plain", "Chemistry", "North-America", "Nearctic-region)", "Massachusetts", "agricultural-practice", "biomass-production", "trees-", "7727-37-9: Nitrogen", "nitrification-", "United-States", "forests-", "Agricultural ecosystems", "land-use", "Massachusetts- (USA-", "forest-lands", "Nutrient dynamics", "vegetation-type", "USA", "Vegetation", "mineralization-", "15. Life on land", "Pinus", "soil-types", "Terrestrial-Ecology (Ecology-", "0401 agriculture", " forestry", " and fisheries", "agricultural-land", "ecosystems-"], "contacts": [{"organization": "Campton, Jana E., Boone, Richard D., Motzkin, Glenn, Foster, David R.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1007/s004420050619"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s004420050619", "name": "item", "description": "10.1007/s004420050619", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s004420050619"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1998-10-01T00:00:00Z"}}, {"id": "10.1007/s10705-007-9098-2", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-04T16:15:00Z", "type": "Journal Article", "created": "2007-04-05", "title": "Reduced Nitrate Concentrations In Shallow Ground Water Under A Non-Fertilised Grass Buffer Strip", "description": "In this paper the suitability of a buffer strip to reduce nitrate concentrations in the upper groundwater was tested for a sandy arable soil in The Netherlands during two consecutive leaching seasons. The bufferstrip was a 3.5\u00a0m wide unfertilised grass strip adjacent to a ditch on an arable field. In total 24 groundwater wells were installed in 4 transects perpendicular to the ditch to determine Cl, NO3 and \u03b415N concentrations. Piezometers were installed to assess the groundwater flow, which was in the direction of the ditch with small downward leakage across a peat layer at about 3\u00a0m depth. Nitrogen was dominantly present as nitrate (NO3). The NO3-N concentrations under the bufferstrip were significantly lower than under the adjacent arable field. The lower concentrations were due to dilution, uptake by grass and denitrification. Nitrate was actively removed in the bufferstrip, since the Cl/NO3 ratios were higher in the bufferstrip than in the remainder of the field. Furthermore, \u03b415N data indicated that denitrification occurred in the groundwater and increased with decreasing distance to the ditch. NO3-N loads to the ditch were estimated at 8.5\u00a0kg\u00a0ha\u22121yr\u22121, which is relatively low for this area. We can, however, not determine whether these relatively low NO3-N loads were causally related to the reduced NO3-N concentrations in the bufferstrip. Nevertheless, the results of the present study are promising and justify additional research on the efficiency of bufferstrips to reduce NO3 concentrations in shallow groundwater, and subsequently reduce NO3 loading of surface water, under Dutch conditions.", "keywords": ["coastal-plain", "Soil Science", "netherlands", "dynamics", "04 agricultural and veterinary sciences", "01 natural sciences", "6. Clean water", "riparian zone", "surface waters", "nitrogen removal", "quality", "sandy soil", "0401 agriculture", " forestry", " and fisheries", "movement", "Agronomy and Crop Science", "agriculture", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1007/s10705-007-9098-2"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nutrient%20Cycling%20in%20Agroecosystems", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10705-007-9098-2", "name": "item", "description": "10.1007/s10705-007-9098-2", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10705-007-9098-2"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2007-04-06T00:00:00Z"}}, {"id": "10.1016/j.agee.2005.10.020", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-04-04T16:15:29Z", "type": "Journal Article", "created": "2006-01-11", "title": "Soil Acidification Without Ph Drop Under Intensive Cropping Systems In Northeast Thailand", "description": "Light textured sandy soils occupy significant areas of Northeast Thailand and are characterized as being acidic to depth with a low inherent fertility. These soils form the basis of agricultural production systems on which significant numbers of people depend upon for livelihoods. The objectives of this study were to investigate soil acidification following the introduction of Stylosanthes in cropping systems of a tropical semi-arid region. Most soils in Northeast Thailand are sandy and acidic (pH 4.0 in CaCl2) with high rate of drainage. Soil acidification was studied over a 6-year period on plots that had been treated either with or without lime additions under different cropping patterns. In the initial first 3 years, a rotation of maize and cowpea was compared to a bare soil treatment where no vegetation was allowed to establish. During the following 3 years, a rotation of maize and Stylosanthes was compared to a continuous Stylosanthes hamata (stylo) treatment. Total soil acidification was calculated from measured pH changes and pH buffer capacity. Acidification due to root system activity was estimated from the above ground biomass production and its ash alkalinity. In the limed systems, soil pH decrease was well correlated with the ash alkalinity of the crop and its removal from the plot. Acidification was highest in the bare soil (6.3 kmol H+ ha(-1) year(-1)), due to leaching of applied N fertilizers. The cowpea-maize rotations did not increase significantly the rate of acid addition (7.6 kmol H+ ha(-1) year(-1)), since the crop residues were returned to the plot. The introduction of stylo in the cropping system resulted in a lower net acidification rate when it was cultivated in rotation with maize (1.3 kmol H+ ha(-1) year(-1)), due to the lower rate of leaching. In contrast, continuous cultivation of stylo triggered accelerated acidification (7.2 kmol H+ ha(-1) year(-1)), as a result of the large quantities of biomass with high ash alkalinity being removed from the plot. In the no-lime system, the pH of the soil profile remained stable at pH 4.0 regardless of the cropping system, even though the acidification rates were quite similar to those in the limed treatments. This would suggest that the soil was strongly buffered at pH 4.0. XRD patterns showed that kaolinite, the main clay mineral, was more disordered and less crystalline in the surface horizons than at depth. It is suggested that the dissolution of kaolinite is responsible for the buffering of soil pH at 4.0. From the dissolution equation of kaolinite, it is expected that the amount of aluminium in the topsoil would increase along with the release silica that would accelerate cementation processes between soil particles resulting in further degradation. (c) 2005 Elsevier B.V. All rights reserved.", "keywords": ["550", "SANDY SOILS", "buffering capacity", "01 natural sciences", "630", "soil degradation", "acidification", "[SDV.EE]Life Sciences [q-bio]/Ecology", "sandy soils", "BUFFERING CAPACITY", "0105 earth and related environmental sciences", "2. Zero hunger", "kaolinite", "SOL SABLEUX", "cropping systems", "04 agricultural and veterinary sciences", "Stylosanthes", "KAOLINITE", "15. Life on land", "6. Clean water", "[SDV.EE] Life Sciences [q-bio]/Ecology", " environment", "ASH ALKALINITY", "0401 agriculture", " forestry", " and fisheries", "environment", "ash alkalinity", "STYLOSANTHES", "ACIDIFICATION"]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2005.10.020"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agriculture%2C%20Ecosystems%20%26amp%3B%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.agee.2005.10.020", "name": "item", "description": "10.1016/j.agee.2005.10.020", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2005.10.020"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2006-06-01T00:00:00Z"}}, {"id": "10.1016/j.agee.2015.10.017", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-04-04T16:15:36Z", "type": "Journal Article", "created": "2015-11-10", "title": "Land Use Changes Affecting Soil Organic Carbon Storage Along A Mangrove Swamp Rice Chronosequence In The Cacheu And Oio Regions (Northern Guinea-Bissau)", "description": "Abstract   Guinea-Bissau has the largest area of mangrove swamp rice, an important cropping system that significantly contribute to the food security of the nation. Attempts to reclaim mangrove swamps for rice growing have shown the importance of a greater knowledge on the effects of land use change on soil properties and soil carbon storage. To address this problem, a study was undertaken within Cacheur and Oio regions in Northern Guinea-Bissau, along the following chronosequence: mangrove, rice and abandoned fields. Changes in C/N ratio, \u03b4 13 C and \u03b4 15 N values were used to study the dynamics of C 3  plant-derived and marine-derived carbon (C) in order to analyze the origin of soil organic matter (SOM) and estimate the impact of marine contribution to SOC. Isotopic signatures within the mangrove swamp rice soils suggested the inwelling of marine derived C. SOC stock was estimated in 0\u201310, 0\u201320, 0\u201340 and 0\u201380\u00a0cm soil layers using fixed soil depth (FD) and fixed soil mass (FM) approaches. The significantly highest values were found in mangrove soils and the lowest in the abandoned fields for both sites, while no significant differences were recorded for the topsoil (0\u201310\u00a0cm) between mangrove and rice fields. The results of this study revealed that conversion of mangrove to rice cropping has technical potential of SOC sequestration in the upper part of the soil (0\u201340\u00a0cm). On the other hand, the abandonment of the fields caused decreases in carbon storage along the whole soil depth. These findings may have important implications for national forest carbon monitoring systems and regional level reducing emission from deforestation and forest degradation (REDD+) strategies.", "keywords": ["Land-use change; Mangrove; Paddy soils; Soil carbon stock; Stable isotopes", "2. Zero hunger", "Soil carbon stock", "13. Climate action", "Land-use change", "Paddy soils", "15. Life on land", "Mangrove", "01 natural sciences", "6. Clean water", "Stable isotopes", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2015.10.017"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agriculture%2C%20Ecosystems%20%26amp%3B%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.agee.2015.10.017", "name": "item", "description": "10.1016/j.agee.2015.10.017", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2015.10.017"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-01-01T00:00:00Z"}}, {"id": "10.1016/j.envpol.2008.05.029", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-04T16:16:13Z", "type": "Journal Article", "created": "2008-07-22", "title": "Feasibility Of Phytoextraction To Remediate Cadmium And Zinc Contaminated Soils", "description": "A Cd and Zn contaminated soil was mixed and equilibrated with an uncontaminated, but otherwise similar soil to establish a gradient in soil contamination levels. Growth of Thlaspi caerulescens (Ganges ecotype) significantly decreased the metal concentrations in soil solution. Plant uptake of Cd and Zn exceeded the decrease of the soluble metal concentrations by several orders of magnitude. Hence, desorption of metals must have occurred to maintain the soil solution concentrations. A coupled regression model was developed to describe the transfer of metals from soil to solution and plant shoots. This model was applied to estimate the phytoextraction duration required to decrease the soil Cd concentration from 10 to 0.5 mg kg(-1). A biomass production of 1 and 5 t dm ha(-1) yr(-1) yields a duration of 42 and 11 yr, respectively. Successful phytoextraction operations based on T. caerulescens require an increased biomass production.", "keywords": ["Time Factors", "Industrial Waste", "phytoremediation", "01 natural sciences", "metal-accumulating plants", "Soil", "hyperaccumulator thlaspi-caerulescens", "heavy-metals", "sandy soil", "Life Science", "Soil Pollutants", "Biomass", "0105 earth and related environmental sciences", "polluted soils", "04 agricultural and veterinary sciences", "field", "6. Clean water", "cd", "Thlaspi", "Zinc", "Biodegradation", " Environmental", "zn", "Feasibility Studies", "0401 agriculture", " forestry", " and fisheries", "rhizosphere", "Plant Shoots", "Cadmium"]}, "links": [{"href": "https://doi.org/10.1016/j.envpol.2008.05.029"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Pollution", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.envpol.2008.05.029", "name": "item", "description": "10.1016/j.envpol.2008.05.029", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.envpol.2008.05.029"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2008-12-01T00:00:00Z"}}, {"id": "10.1016/j.foreco.2010.09.007", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-04T16:16:25Z", "type": "Journal Article", "created": "2010-10-10", "title": "Organic Residue Mass At Planting Is An Excellent Predictor Of Tree Growth In Eucalyptus Plantations Established On A Sandy Tropical Soil", "description": "Abstract   Tropical plantation forests are meeting an increasing proportion of global wood demand and comprehensive studies assessing the impact of silvicultural practices on tree and soil functioning are required to achieve sustainable yields. The objectives of our study were: (1) to quantify the effects of contrasting organic residue (OR) retention methods on tree growth and soil nutrient pools over a full  Eucalyptus  rotation and (2) to assess the potential of soil analyses to predict yields of fast-growing plantations established on tropical sandy soils. An experiment was set up in the Congo at the harvesting of the first rotation after afforestation of a native herbaceous savanna. Six treatments were set up in 0.26\u00a0ha plots and replicated in 4 blocks, with OR mass at planting ranging from 0 to 46.5\u00a0Mg\u00a0ha \u22121 . Tree growth over the whole rotation was highly dependent on OR management at planting. Over-bark trunk volume 7 years after planting ranged from 96\u00a0m 3 \u00a0ha \u22121  in the treatment with forest floor and harvest residue removal at planting to 164\u00a0m 3 \u00a0ha \u22121  in the treatment with the largest amount of OR. A comparison of nutrient stocks within the ecosystem at planting and at the end of the rotation suggested that nutrient contents in OR were largely involved in the different response observed between treatments. OR management treatments did not significantly modify most of the nutrient concentrations in the upper layers of the mineral soil. Conventional soil analyses performed before planting and at ages 1 and 3 years were unable to detect differences between treatments despite large differences in tree growth. In contrast, linear regressions between stand aboveground biomass at harvesting and OR mass at planting (independent variable) showed that OR mass was an excellent predictor of stand yield ( R  2 \u00a0=\u00a00.99). A large share of soil fertility comes from organic material above the mineral soil in highly weathered sandy soils and OR mass at planting might be used in conjunction with soil analyses to assess the potential of these soils to support forest plantations.", "keywords": ["0106 biological sciences", "570", "http://aims.fao.org/aos/agrovoc/c_7170", "[SDV]Life Sciences [q-bio]", "rendement des cultures", "Slash", "F62 - Physiologie v\u00e9g\u00e9tale - Croissance et d\u00e9veloppement", "for\u00eat tropicale", "01 natural sciences", "630", "http://aims.fao.org/aos/agrovoc/c_10176", "http://aims.fao.org/aos/agrovoc/c_24904", "sol tropical", "http://aims.fao.org/aos/agrovoc/c_16118", "http://aims.fao.org/aos/agrovoc/c_5387", "2. Zero hunger", "Eucalyptus", "substance nutritive", "r\u00e9sidu de r\u00e9colte", "P35 - Fertilit\u00e9 du sol", "http://aims.fao.org/aos/agrovoc/c_1811", "15. Life on land", "croissance", "Carbon", "sol sableux", "K10 - Production foresti\u00e8re", "[SDV] Life Sciences [q-bio]", "fertilit\u00e9 du sol", "Residue", "Fertility", "http://aims.fao.org/aos/agrovoc/c_3394", "Indicator", "http://aims.fao.org/aos/agrovoc/c_7978", "mati\u00e8re organique", "Organic matter", "plantations", "http://aims.fao.org/aos/agrovoc/c_5274", "http://aims.fao.org/aos/agrovoc/c_6781", "http://aims.fao.org/aos/agrovoc/c_5990", "Nutrient", "http://aims.fao.org/aos/agrovoc/c_2683"]}, "links": [{"href": "https://doi.org/10.1016/j.foreco.2010.09.007"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Forest%20Ecology%20and%20Management", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.foreco.2010.09.007", "name": "item", "description": "10.1016/j.foreco.2010.09.007", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.foreco.2010.09.007"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-12-01T00:00:00Z"}}, {"id": "10.1016/j.geoderma.2007.11.019", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-04-04T16:16:30Z", "type": "Journal Article", "created": "2008-01-18", "title": "Soil Acidification And Carbon Storage In Fertilized Pastures Of Northeast Thailand", "description": "Abstract   Light textured soils are often characterized as acid to depth that results in low productivity levels. In an effort to address this constraint a four year study was undertaken that evaluated the productivity of Gamba grass (Andropogon gayanus) and Stylosanthes (Stylosanthes guianensis) (Stylo) to grow on these soils. In addition, Gamba grass treatments received either no nitrogen fertilizer (Gamba) or a total 287\u00a0kg N ha\u2212\u00a01 as either KNO3 (Gamba NO3) or (NH4)2SO4 (Gamba NH4). Average annual dry matter production levels for the Gamba, Gamba NO3 and Gamba NH4 were 11.9, 22.5, and 26.6\u00a0t ha\u2212\u00a01 whilst that of the Stylo treatment was 6.9\u00a0t ha\u2212\u00a01. However, the net annual acid addition rates associated with the export of biomass ranged from 5.1\u201313.3\u00a0kmol H+ ha\u2212\u00a01 yr\u2212\u00a01. Rapid acidification of the soil profile was observed to depths\u00a0>\u00a0110\u00a0cm in all treatments regardless of the tempering influence of nitrate based fertilizers. Soil organic carbon levels over the study period showed a 6 fold increase at >\u00a030\u00a0cm from the initial values, suggesting significant carbon sequestration. Whilst the study demonstrates the positive impact of a grass or legume ley in producing forage for livestock in a cut and carry system under rainfed conditions in Northeast Thailand, along with positive contributions to soil organic carbon sequestration, a precautionary approach should be adopted. Significant accelerated soil acidification has occurred to depths\u00a0>\u00a0110\u00a0cm that brings into question the sustainability of these systems on these soil types.", "keywords": ["2. Zero hunger", "carbon", "soil texture", "04 agricultural and veterinary sciences", "15. Life on land", "pastures", "6. Clean water", "acidification", "nitrogen fertilizers", "soil properties", "feeds", "stylosanthes guianensis", "0401 agriculture", " forestry", " and fisheries", "sandy soils", "andropogon gayanus"], "contacts": [{"organization": "Noble, A.D., Suzuki, S., Soda, Wannipa, Ruaysoongnern, Sawaeng, Berthelsen, S.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.geoderma.2007.11.019"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Geoderma", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.geoderma.2007.11.019", "name": "item", "description": "10.1016/j.geoderma.2007.11.019", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.geoderma.2007.11.019"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2008-03-01T00:00:00Z"}}, {"id": "10.1016/j.jssas.2011.04.004", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-04-04T16:16:47Z", "type": "Journal Article", "created": "2011-06-02", "title": "Long Term Effect Of Irrigation With The Treated Sewage Effluent On Some Soil Properties Of Al-Hassa Governorate, Saudi Arabia", "description": "AbstractA case study was undertaken to assess the long-term effect of sewage irrigation on some soil properties and heavy metals concentrations in the soils of the date palm at Al-Hassa Governorate, Saudi Arabia. Eighty-two surface soil samples were collected from the studying area. Half of it was collected from an area irrigated for more than 13years with treated sewage effluent. Meanwhile the rest of soil samples were collected from an area irrigated with well water. Furthermore, samples from sewage effluents and well water used for irrigation were collected and analyzed mainly for their chemical composition and their metal contents. The obtained results pertaining irrigation water analysis indicated that sewage effluents were found to contain higher content of Pb, Zn, Cu, Co, Cr, As, Cd, Fe, Mn and Ni compared to well water. On the other hand data emphasized the role of sewage effluent irrigation on increasing heavy metals as well as organic matter contents in the soil samples when comparing with the respective values found in the soil irrigated with well water. The soil salinity ranged from 3.58 to 20.7dSm\u22121 with an average of 7.9dSm\u22121 due to irrigation with well water. While the respective soil salinity due to irrigation for long period with the treated sewage effluent ranged from 2.5 to 3.69dSm\u22121 with an average of 2.8dSm\u22121. There was an increase in organic matter content ranging from 17% to 30% in sewage-irrigated soil samples as compared to well water-irrigated ones. On an average, the soil pH dropped by 0.3U as a result of sewage irrigation. Long term sewage irrigation resulted in significant build-up of total concentration of Zn (130%), Pb (55%), Fe (82%), Ni (84%), Mn (30%), Cu (40%), Cr (75%), Co (78%) and As (67%) in sewage-irrigated soil samples over adjacent well water-irrigated soil samples.", "keywords": ["0106 biological sciences", "Water quality", "Heavy metals", "Agriculture (General)", "Well water", "Sewage effluent", "15. Life on land", "01 natural sciences", "Sandy soil", "6. Clean water", "S1-972", "0105 earth and related environmental sciences"], "contacts": [{"organization": "S.E. El-Maghraby, A. El-Eter, A.M. Al Omron, Mahmoud Nadeem, H. Al-Mohani,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.jssas.2011.04.004"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20the%20Saudi%20Society%20of%20Agricultural%20Sciences", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.jssas.2011.04.004", "name": "item", "description": "10.1016/j.jssas.2011.04.004", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.jssas.2011.04.004"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-01-01T00:00:00Z"}}, {"id": "10.1016/j.soilbio.2004.08.025", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-04-04T16:17:02Z", "type": "Journal Article", "created": "2004-12-15", "title": "Long-Term Effects Of Metal-Containing Farmyard Manure And Sewage Sludge On Soil Organic Matter In A Fluvisol", "description": "Abstract   Our aim was to establish the long-term effects of repeated applications after 20\u00a0y of organic amendments (farmyard manure at 10\u00a0t\u00a0ha \u22121 \u00a0y \u22121 , and urban sewage sludge at two different rates, 10\u00a0t\u00a0ha \u22121 \u00a0y \u22121  and 100\u00a0t\u00a0ha \u22121  every 2\u00a0y) on the quality of a sandy and poorly buffered soil (Fluvisol, pH 6). Chemical characteristics and biodegradability of the labile organic matter, which is mainly derived from microbial biomass and biodegradation products of organic residues, were chosen as indicators for soil quality. The organic C content had reached a maximal value (30.6\u00a0g\u00a0C\u00a0kg \u22121  in the 100\u00a0t sludge-treated soil), i.e. about 2.5 times that in the control. Six years after the last application, the organic C content and the microbial biomass content remained higher in sludge-treated soils than in the control. In contrast, the proportion of labile organic matter was significantly lower in sludge-treated soils than in manure-treated and control soils. The labile organic matter of sludge extracts appeared less humified than that of manure-treated and control soils.", "keywords": ["2. Zero hunger", "Sandy soils", "04 agricultural and veterinary sciences", "[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study", "15. Life on land", "630", "Soil quality", "6. Clean water", "12. Responsible consumption", "[SDV.EE] Life Sciences [q-bio]/Ecology", " environment", "[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "[SDV.EE]Life Sciences [q-bio]/Ecology", "[SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "11. Sustainability", "Farmyard manure", "Zn", "0401 agriculture", " forestry", " and fisheries", "Labile organic matter", "[SDV.SA.SDS] Life Sciences [q-bio]/Agricultural sciences/Soil study", "Sewage sludge", "environment", "Cu", "Pb"]}, "links": [{"href": "https://doi.org/10.1016/j.soilbio.2004.08.025"}, {"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.2004.08.025", "name": "item", "description": "10.1016/j.soilbio.2004.08.025", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.soilbio.2004.08.025"}, {"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": "10.1016/j.still.2005.02.018", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-04-04T16:17:17Z", "type": "Journal Article", "created": "2005-03-11", "title": "Effect Of Tillage And Crop Rotations On Pore Size Distribution And Soil Hydraulic Conductivity In Sandy Clay Loam Soil Of The Indian Himalayas", "description": "Abstract   Tillage management can affect crop growth by altering the pore size distribution, pore geometry and hydraulic properties of soil. In the present communication, the effect of different tillage management viz., conventional tillage (CT), minimum tillage (MT) and zero-tillage (ZT) and different crop rotations viz. [(soybean\u2013wheat (S\u2013W), soybean\u2013lentil (S\u2013L) and soybean\u2013pea (S\u2013P)] on pore size distribution and soil hydraulic conductivities [saturated hydraulic conductivity ( K  sat ) and unsaturated hydraulic conductivity { k ( h )}] of a sandy clay loam soil was studied after 4 years prior to the experiment. Soil cores were collected after 4 year of the experiment at an interval of 75\u00a0mm up to 300\u00a0mm soil depth for measuring soil bulk density, soil water retention constant ( b ), pore size distribution,  K  sat  and  k ( h ). Nine pressure levels (from 2 to 1500\u00a0kPa) were used to calculate pore size distribution and  k ( h ). It was observed that b values at all the studied soil depths were higher under ZT than those observed under CT irrespective of the crop rotations. The values of soil bulk density observed under ZT were higher in 0\u201375\u00a0mm soil depth in all the crop rotations. But, among the crop rotations, soils under S\u2013P and S\u2013L rotations showed relatively lower bulk density values than S\u2013W rotation. Average values of the volume fraction of total porosity with pores  3 \u00a0m \u22123  under CT, MT and ZT; and 0.592, 0.610 and 0.626\u00a0m 3 \u00a0m \u22123  under S\u2013W, S\u2013L and S\u2013P, respectively. In contrast, the average values of the volume fraction of total porosity with pores >150\u00a0\u03bcm in diameter (pores draining freely with gravity) were 0.124, 0.096 and 0.095\u00a0m 3 \u00a0m \u22123  under CT, MT and ZT; and 0.110, 0.104 and 0.101\u00a0m 3 \u00a0m \u22123  under S\u2013W, S\u2013L and S\u2013P, respectively. Saturated hydraulic conductivity values in all the studied soil depths were significantly greater under ZT than those under CT (range from 300 to 344\u00a0mm\u00a0day \u22121 ). The observed  k ( h ) values at 0\u201375\u00a0mm soil depth under ZT were significantly higher than those computed under CT at all the suction levels, except at \u221210, \u2212100 and \u2212400\u00a0kPa suction. Among the crop rotations, S\u2013P rotation recorded significantly higher  k ( h ) values than those under S\u2013W and S\u2013L rotations up to \u221240\u00a0kPa suction. The interaction effects of tillage and crop rotations affecting the  k ( h ) values were found significant at all the soil water suctions. Both S\u2013L and S\u2013P rotations resulted in better soil water retention and transmission properties under ZT.", "keywords": ["2. Zero hunger", "Tillage management", "Loamy sand", "Sandy soils", "550", "Soil hydraulic conductivity", "Soybean based cropping system", "India", "04 agricultural and veterinary sciences", "Pore size distribution", "15. Life on land", "Soil fertility", "630", "6. Clean water", "Crop rotation", "0401 agriculture", " forestry", " and fisheries", "Conservation tillage"]}, "links": [{"href": "https://doi.org/10.1016/j.still.2005.02.018"}, {"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.2005.02.018", "name": "item", "description": "10.1016/j.still.2005.02.018", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.still.2005.02.018"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2006-04-01T00:00:00Z"}}, {"id": "10.1016/j.still.2006.01.009", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-04-04T16:17:18Z", "type": "Journal Article", "created": "2006-03-24", "title": "Carbon Sequestration And Relationship Between Carbon Addition And Storage Under Rainfed Soybean-Wheat Rotation In A Sandy Loam Soil Of The Indian Himalayas", "description": "Abstract   Soil organic matter (SOM) contributes to the productivity and physical properties of soils. Although crop productivity is sustained mainly through the application of organic manure in the Indian Himalayas, no information is available on the effects of long-term manure addition along with mineral fertilizers on C sequestration and the contribution of total C input towards soil organic C (SOC) storage. We analyzed results of a long-term experiment, initiated in 1973 on a sandy loam soil under rainfed conditions to determine the influence of different combinations of NPK fertilizer and fertilizer\u00a0+\u00a0farmyard manure (FYM) at 10\u00a0Mg\u00a0ha \u22121  on SOC content and its changes in the 0\u201345\u00a0cm soil depth. Concentration of SOC increased 40 and 70% in the NPK\u00a0+\u00a0FYM-treated plots as compared to NPK (43.1\u00a0Mg\u00a0C\u00a0ha \u22121 ) and unfertilized control plots (35.5\u00a0Mg\u00a0C\u00a0ha \u22121 ), respectively. Average annual contribution of C input from soybean ( Glycine max  (L.) Merr.) was 29% and that from wheat ( Triticum aestivum  L. Emend. Flori and Paol) was 24% of the harvestable above-ground biomass yield. Annual gross C input and annual rate of total SOC enrichment were 4852 and 900\u00a0kg\u00a0C\u00a0ha \u22121 , respectively, for the plots under NPK\u00a0+\u00a0FYM. It was estimated that 19% of the gross C input contributed towards the increase in SOC content. C loss from native SOM during 30 years averaged 61\u00a0kg\u00a0C\u00a0ha \u22121 \u00a0yr \u22121 . The estimated quantity of biomass C required to maintain equilibrium SOM content was 321\u00a0kg\u00a0ha \u22121 \u00a0yr \u22121 . The total annual C input by the soybean\u2013wheat rotation in the plots under unfertilized control was 890\u00a0kg\u00a0ha \u22121 \u00a0yr \u22121 . Thus, increase in SOC concentration under long-term (30 years) rainfed soybean\u2013wheat cropping was due to the fact that annual C input by the system was higher than the required amount to maintaining equilibrium SOM content.", "keywords": ["Rainfed cropping", "Carbon sequestration", "2. Zero hunger", "Loamy sand", "Sandy soils", "Soybean based cropping system", "India", "04 agricultural and veterinary sciences", "15. Life on land", "Soil fertility", "630", "Wheat", "Farmyard manure", "0401 agriculture", " forestry", " and fisheries", "Sub-temperate Indian Himalayas"]}, "links": [{"href": "https://doi.org/10.1016/j.still.2006.01.009"}, {"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.2006.01.009", "name": "item", "description": "10.1016/j.still.2006.01.009", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.still.2006.01.009"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2007-01-01T00:00:00Z"}}, {"id": "10.1016/j.still.2017.07.015", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-04-04T16:17:27Z", "type": "Journal Article", "created": "2017-08-23", "title": "Spatial variability of soil properties and cereal yield in a cultivated field on sandy soil", "description": "Abstract   Sandy soils are used in agriculture in different regions of the world. In Poland soils derived from sands occupy about 50% of agricultural area. Productivity of the soils depend on the soil properties that vary in the scale of field. This study aimed at determining and mapping the within-field variation of soil physical and chemical properties and grain yield of oats, rye, oats and triticale in 2001, 2002, 2003, 2015, respectively. The experiment was set up in a field (200\u00a0\u00d7\u00a050\u00a0m) on sandy soil in Trzebieszow (region Podlasie, Poland). The soil measurements included sand, silt, clay, and organic carbon (SOC) contents, cation exchange capacity (CEC), pH in the topsoil (0\u201310\u00a0cm) and subsoil (30\u201340\u00a0cm) layers in 2001, and water content and bulk density in the topsoil layer in spring and summer 2002\u20132003. The yields of oats were assessed in 2001 and 2003 and those of rye and triticale in 2002 and 2015, respectively. The soil properties and cereal yields were determined at 33\u201355 points in a grid evenly covering the whole field area. The results were analyzed using classic statistics and geostatistics by constructing semivariograms and 2D mapping by Inverse Distance Weighting (IDW). The cereal grain yields were significantly positively correlated with the topsoil water content (SWC) (r\u00a0=\u00a00.295\u20130.711), clay content (r\u00a0=\u00a00.081\u20130.174), and SOC in the subsoil (r\u00a0=\u00a00.208\u20130.271) and CEC in both layers (r\u00a0=\u00a00.123\u20130.298) and negatively correlated with bulk density (BD) (r\u00a0=\u00a0\u20130.065 to \u22120.279). The spatial dependence determined by the \u201cnugget-to-sill\u201d ratio was moderate or weak for the silt and clay content, CEC, and pH (29\u201379%) and strong for SOC, BD, SWC, and crop yield (0.2\u201313.2%). The effective range of the spatial dependence for all studied quantities varied from 9.9 to 120\u00a0m. The cereal yields were positively and significantly correlated between all study years (r\u00a0=\u00a00.141\u20130.734), which indicates inter-annual similarity in their spatial distribution. The 2D maps based on the IDW allowed assessing how gradual or sharp the changes in the studied quantities from one place to another are. Similar spatial patterns of the SWC, SOC and CEC, and crop yields were observed. This is of importance in precise and sustainable field management aimed at increasing and aligning spatial crop productivity of the studied low-productivity sandy soils that will have to be used in crop production due to the current shortage of land resources and food supplies on a global scale.", "keywords": ["2. Zero hunger", "2D maps", "soil properties", "sandy soil", "spatial variation", "0401 agriculture", " forestry", " and fisheries", "cereal yield", "04 agricultural and veterinary sciences", "semivariograms", "15. Life on land"]}, "links": [{"href": "https://doi.org/10.1016/j.still.2017.07.015"}, {"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.2017.07.015", "name": "item", "description": "10.1016/j.still.2017.07.015", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.still.2017.07.015"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-12-01T00:00:00Z"}}, {"id": "10.1111/j.1365-2389.2005.00707.x", "type": "Feature", "geometry": null, "properties": {"license": "Restricted", "updated": "2026-04-04T16:19:06Z", "type": "Journal Article", "created": "2005-09-12", "title": "Long-Term Changes In Organic Matter Of Woodland Soils Cleared For Arable Cropping In Zimbabwe", "description": "Summary<p>Subsistence farmers in Africa depend largely on the soil organic matter to sustain crop productivity. Long\uffe2\uff80\uff90term changes in soil organic carbon and nitrogen were measured after woodland clearance for smallholder subsistence farming or for commercial farming. The contents of organic carbon and nitrogen in soil under reference woodlands were largest (53.3\uffe2\uff80\uff83t C ha\uffe2\uff88\uff921, 4.88\uffe2\uff80\uff83t N ha\uffe2\uff88\uff921) in a red clay soil (\uffe2\uff88\uffbc\uffe2\uff80\uff8350% clay + silt), followed by a granitic sand (\uffe2\uff88\uffbc\uffe2\uff80\uff8312% clay + silt; 22.8\uffe2\uff80\uff83t C ha\uffe2\uff88\uff921, 1.47\uffe2\uff80\uff83t N ha\uffe2\uff88\uff921) and least (19.5\uffe2\uff80\uff83t C ha\uffe2\uff88\uff921, 0.88\uffe2\uff80\uff83t N ha\uffe2\uff88\uff921) in a Kalahari sand (\uffe2\uff88\uffbc\uffe2\uff80\uff835% clay + silt). Organic carbon declined rapidly under cultivation to attain new equilibria within 10\uffe2\uff80\uff83years on all smallholdings. Greatest losses occurred in soils that initially contained most carbon and nitrogen in the order: red clay (22.4\uffe2\uff80\uff83t C ha\uffe2\uff88\uff921 and 1.0\uffe2\uff80\uff83t N ha\uffe2\uff88\uff921) &gt; granitic sand (13.2\uffe2\uff80\uff83t C ha\uffe2\uff88\uff921 and 0.8\uffe2\uff80\uff83t N ha\uffe2\uff88\uff921) &gt; Kalahari sand (10.6\uffe2\uff80\uff83t C ha\uffe2\uff88\uff921 and 0.5\uffe2\uff80\uff83t N ha\uffe2\uff88\uff921). On the clay soil, commercial farming with intensive use of mineral fertilizers and incorporation of maize stover led to more gradual decline: at equilibrium, contents of carbon and nitrogen were 15\uffe2\uff80\uff83t C ha\uffe2\uff88\uff921 and 1.7\uffe2\uff80\uff83t N ha\uffe2\uff88\uff921 greater than on smallholdings with similar soil and climate.</p><p>In the Kalahari sand the \uffce\uffb413C of organic C remained constant after woodland clearance, and maize contributed less than 10% of the total C even after 55\uffe2\uff80\uff83years. The \uffce\uffb413C signature increased slightly with increasing duration of cultivation by smallholders in the granitic sands and red clay soil where maize contributed 29% and 35% of the C at equilibrium. Under more productive commercial farming, the carbon derived from maize accounted for 50% of the total after 10\uffe2\uff80\uff83years of cultivation and 67% at equilibrium. The persistence of woodland carbon in the sandy soil is attributed to chemical stabilization resulting from large concentrations of lignin and polyphenols in the tree litter, or as charcoal.</p>", "keywords": ["2. Zero hunger", "agroecosystems", "c-13 natural-abundance", "carbon dynamics", "spodosols", "04 agricultural and veterinary sciences", "15. Life on land", "maize", "stabilization", "residues", "vegetation", "0401 agriculture", " forestry", " and fisheries", "sandy soils", "isotope"], "contacts": [{"organization": "Shamie Zingore, Ken E. Giller, Ken E. Giller, P. Nyamugafata, C. Manyame,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1111/j.1365-2389.2005.00707.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.1365-2389.2005.00707.x", "name": "item", "description": "10.1111/j.1365-2389.2005.00707.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-2389.2005.00707.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-04-11T00:00:00Z"}}, {"id": "10.14214/sf.10134", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-04-04T16:19:53Z", "type": "Journal Article", "created": "2019-04-26", "title": "Soil disturbance by cut-to-length machinery on mid-grained soils", "description": "<ja:p>Factors affecting soil disturbance caused by harvester and forwarder were studied on mid-grained soils in Finland. Sample plots were harvested using a one-grip harvester. The harvester operator processed the trees outside the strip roads, and the remaining residues were removed to exclude the covering effect of residues. Thereafter, a loaded forwarder made up to 5 passes over the sample plots. The average rut depth after four machine passes was positively correlated to the volumetric water content at a depth of 0\u00e2\u0080\u009310 cm in mineral soil, as well as the thickness of the organic layer and the harvester rut depth, and negatively correlated with penetration resistance at depths of both 0\u00e2\u0080\u009320 cm and 5\u00e2\u0080\u009340 cm. We present 5 models to predict forwarder rut depth. Four include the cumulative mass driven over a measurement point and combinations of penetration resistance, water content and the depth of organic layer. The fifth model includes harvester rut depth and the cumulative overpassed mass and provided the best fit. Changes in the penetration resistance (PR) were highest at depths of 20\u00e2\u0080\u009340 cm. Increase in BD and VWC decreased PR, which increased with total overdriven mass. After four to five machine passes PR values started to stabilize.</ja:p>", "keywords": ["silty soil", "ta1171", "silty soils", "rut formation", "Forestry", "04 agricultural and veterinary sciences", "SD1-669.5", "15. Life on land", "ta4112", "soil compaction", "harvesting damage", "sandy soil", "0401 agriculture", " forestry", " and fisheries", "sandy soils"], "contacts": [{"organization": "Sir\u00e9n, Matti, Ala-Ilom\u00e4ki, Jari, Lindeman, Harri, Uusitalo, Jori, Kiilo, Kalle E.K., Salmivaara, Aura, Ryyn\u00e4nen, Ari,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.14214/sf.10134"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Silva%20Fennica", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.14214/sf.10134", "name": "item", "description": "10.14214/sf.10134", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.14214/sf.10134"}, {"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": "2745857202", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-04-04T16:26:19Z", "type": "Journal Article", "created": "2017-08-23", "title": "Spatial variability of soil properties and cereal yield in a cultivated field on sandy soil", "description": "Abstract   Sandy soils are used in agriculture in different regions of the world. In Poland soils derived from sands occupy about 50% of agricultural area. Productivity of the soils depend on the soil properties that vary in the scale of field. This study aimed at determining and mapping the within-field variation of soil physical and chemical properties and grain yield of oats, rye, oats and triticale in 2001, 2002, 2003, 2015, respectively. The experiment was set up in a field (200\u00a0\u00d7\u00a050\u00a0m) on sandy soil in Trzebieszow (region Podlasie, Poland). The soil measurements included sand, silt, clay, and organic carbon (SOC) contents, cation exchange capacity (CEC), pH in the topsoil (0\u201310\u00a0cm) and subsoil (30\u201340\u00a0cm) layers in 2001, and water content and bulk density in the topsoil layer in spring and summer 2002\u20132003. The yields of oats were assessed in 2001 and 2003 and those of rye and triticale in 2002 and 2015, respectively. The soil properties and cereal yields were determined at 33\u201355 points in a grid evenly covering the whole field area. The results were analyzed using classic statistics and geostatistics by constructing semivariograms and 2D mapping by Inverse Distance Weighting (IDW). The cereal grain yields were significantly positively correlated with the topsoil water content (SWC) (r\u00a0=\u00a00.295\u20130.711), clay content (r\u00a0=\u00a00.081\u20130.174), and SOC in the subsoil (r\u00a0=\u00a00.208\u20130.271) and CEC in both layers (r\u00a0=\u00a00.123\u20130.298) and negatively correlated with bulk density (BD) (r\u00a0=\u00a0\u20130.065 to \u22120.279). The spatial dependence determined by the \u201cnugget-to-sill\u201d ratio was moderate or weak for the silt and clay content, CEC, and pH (29\u201379%) and strong for SOC, BD, SWC, and crop yield (0.2\u201313.2%). The effective range of the spatial dependence for all studied quantities varied from 9.9 to 120\u00a0m. The cereal yields were positively and significantly correlated between all study years (r\u00a0=\u00a00.141\u20130.734), which indicates inter-annual similarity in their spatial distribution. The 2D maps based on the IDW allowed assessing how gradual or sharp the changes in the studied quantities from one place to another are. Similar spatial patterns of the SWC, SOC and CEC, and crop yields were observed. This is of importance in precise and sustainable field management aimed at increasing and aligning spatial crop productivity of the studied low-productivity sandy soils that will have to be used in crop production due to the current shortage of land resources and food supplies on a global scale.", "keywords": ["2. Zero hunger", "2D maps", "soil properties", "sandy soil", "spatial variation", "0401 agriculture", " forestry", " and fisheries", "cereal yield", "04 agricultural and veterinary sciences", "semivariograms", "15. Life on land"]}, "links": [{"href": "https://doi.org/2745857202"}, {"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": "2745857202", "name": "item", "description": "2745857202", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2745857202"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-12-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?facets=true&soil_classification=sandy+soils&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?facets=true&soil_classification=sandy+soils&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?facets=true&soil_classification=sandy+soils&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?facets=true&soil_classification=sandy+soils&offset=17", "hreflang": "en-US"}], "numberMatched": 17, "numberReturned": 17, "distributedFeatures": [], "timeStamp": "2026-04-04T17:35:31.672473Z"}