{"type": "FeatureCollection", "features": [{"id": "10.1016/j.agee.2010.10.001", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-30T16:15:53Z", "type": "Journal Article", "created": "2010-10-29", "title": "Soil Properties, Crop Production And Greenhouse Gas Emissions From Organic And Inorganic Fertilizer-Based Arable Cropping Systems", "description": "Organic and conventional farming practices differ in the use of several management strategies, including use of catch crops, green manure, and fertilization, which may influence soil properties, greenhouse gas emissions and productivity of agroecosystems. An 11-yr-old field experiment on a sandy loam soil in Denmark was used to compare several crop rotations with respect to a range of physical, chemical and biological characteristics related to carbon (C) and nitrogen (N) flows. Four organic rotations and an inorganic fertilizer-based system were selected to evaluate effects of fertilizer type, catch crops, of grass-clover used as green manure, and of animal manure application. Soil was sampled from winter wheat and spring barley plots on 19 September 2007, 14 April 2008 and 22 September 2008, i.e. before, during, and after the growth season. The soils were analyzed for multiple attributes: total soil organic carbon (SOC), total N, microbial biomass N (MBN), potentially mineralizable N (PMN), and levels of potential ammonium oxidation (PAO) and denitrifying enzyme activity (DEA). In situ measurements of soil heterotrophic carbon dioxide (CO2) respiration and nitrous oxide emissions were conducted in plots with winter wheat. In April 2008, prior to field operations, intact soil cores were collected at two depths (0\u20135 and 5\u201310 cm) in plots under winter wheat. Water retention characteristics of each core were determined and used to calculate relative gas diffusivity (DP/Do). Finally, crop growth was monitored and grain yields measured at harvest maturity. The different management strategies between 1997 and 2007 led to soil carbon inputs that were on average 18\u201368% and 32\u201391% higher in the organic than inorganic fertilizer-based rotations for the sampled winter wheat and spring barley crops, respectively. Nevertheless, SOC levels in 2008 were similar across systems. The cumulative soil respiration for the period February to August 2008 ranged between 2 and 3 t CO2\u2013C ha\u22121 and was correlated (r = 0.95) with average C inputs. In the organic cropping systems, pig slurry application and inclusion of catch crops generally increased soil respiration, PMN and PAO. At field capacity, relative gas diffusivity at 0\u20135 cm depth was >50% higher in the organic than the inorganic fertilizer-based system (P < 0.05). Crop yields in 2008 were generally lower in the low-input organic rotations than in the high-input inorganic fertilizer-based system; only spring barley in rotations with pig slurry application and incorporation of a catch crop prior to sowing obtained grain yields similar to levels achieved in the system where inorganic fertilizer was applied. These results suggest that within organic cropping systems, both microbial activity and crop yields could be enhanced through inclusion of catch crops. However, the timing of catch crop incorporation is critical.", "keywords": ["2. Zero hunger", "microbial biomass", "Nutrient turnover", "inorganic fertilizer", "15. Life on land", "potential ammonium oxidation", "Air and water emissions", "6. Clean water", "12. Responsible consumption", "denitrifier enzyme activity", "Soil biology", "/dk/atira/pure/core/keywords/Life", "13. Climate action", "potential mineralizable nitrogen", "catch drop", "gas diffusivity", "11. Sustainability", "Former LIFE faculty"]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2010.10.001"}, {"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.2010.10.001", "name": "item", "description": "10.1016/j.agee.2010.10.001", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2010.10.001"}, {"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.agee.2017.01.029", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-30T16:15:58Z", "type": "Journal Article", "created": "2017-02-07", "title": "Impact Of Reduced Tillage On Greenhouse Gas Emissions And Soil Carbon Stocks In An Organic Grass-Clover Ley - Winter Wheat Cropping Sequence", "description": "Organic reduced tillage aims to combine the environmental benefits of organic farming and conservation tillage to increase sustainability and soil quality. In temperate climates, there is currently no knowledge about its impact on greenhouse gas emissions and only little information about soil organic carbon (SOC) stocks in these management systems. We therefore monitored nitrous oxide (N2O) and methane (CH4) fluxes besides SOC stocks for two years in a grass-clover ley - winter wheat - cover crop sequence. The monitoring was undertaken in an organically managed long-term tillage trial on a clay rich soil in Switzerland. Reduced tillage (RT) was compared with ploughing (conventional tillage, CT) in interaction with two fertilisation systems, cattle slurry alone (SL) versus cattle manure compost and slurry (MC). Median N2O and CH4 flux rates were 13\u00a0\u03bcg N2O-N\u00a0m-2\u00a0h-1 and -2\u00a0\u03bcg CH4C\u00a0m-2\u00a0h-1, respectively, with no treatment effects. N2O fluxes correlated positively with nitrate contents, soil temperature, water filled pore space and dissolved organic carbon and negatively with ammonium contents in soil. Pulse emissions after tillage operations and slurry application dominated cumulative gas emissions. N2O emissions after tillage operations correlated with SOC contents and collinearly to microbial biomass. There was no tillage system impact on cumulative N2O emissions in the grass-clover (0.8-0.9\u00a0kg\u00a0N2O-N\u00a0ha-1, 369\u00a0days) and winter wheat (2.1-3.0\u00a0kg N2O-N\u00a0ha-1, 296\u00a0days) cropping seasons, with a tendency towards higher emissions in MC than SL in winter wheat. Including a tillage induced peak after wheat harvest, a full two year data set showed increased cumulative N2O emissions in RT than CT and in MC than SL. There was no clear treatment influence on cumulative CH4 uptake. Topsoil SOC accumulation (0-0.1\u00a0m) was still ongoing. SOC stocks were more stratified in RT than CT and in MC than SL. Total SOC stocks (0-0.5\u00a0m) were higher in RT than CT in SL and similar in MC. Maximum relative SOC stock difference accounted for +8.1\u00a0Mg\u00a0C\u00a0ha-1 in RT-MC compared to CT-SL after 13 years which dominated over the relative increase in greenhouse gas emissions. Under these site conditions, organic reduced tillage and manure compost application seems to be a viable greenhouse gas mitigation strategy as long as SOC is sequestered.", "keywords": ["2. Zero hunger", "Ecology", "04 agricultural and veterinary sciences", "15. Life on land", "Air and water emissions", "7. Clean energy", "Soil quality", "Soil tillage", "Article", "6. Clean water", "12. Responsible consumption", "13. Climate action", "11. Sustainability", "0401 agriculture", " forestry", " and fisheries", "Animal Science and Zoology", "Agronomy and Crop Science"]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2017.01.029"}, {"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.2017.01.029", "name": "item", "description": "10.1016/j.agee.2017.01.029", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2017.01.029"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-02-01T00:00:00Z"}}, {"id": "10.1007/s13593-011-0056-7", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-30T16:15:45Z", "type": "Journal Article", "created": "2011-10-18", "title": "Legumes For Mitigation Of Climate Change And The Provision Of Feedstock For Biofuels And Biorefineries. A Review", "description": "Humans are currently confronted by many global challenges. These include achieving food security for a rapidly expanding population, lowering the risk of climate change by reducing the net release of greenhouse gases into the atmosphere due to human activity, and meeting the increasing demand for energy in the face of dwindling reserves of fossil energy and uncertainties about future reliability of supply. Legumes deliver several important services to societies. They provide important sources of oil, fiber, and protein-rich food and feed while supplying nitrogen (N) to agro-ecosystems via their unique ability to fix atmospheric N2 in symbiosis with the soil bacteria rhizobia, increasing soil carbon content, and stimulating the productivity of the crops that follow. However, the role of legumes has rarely been considered in the context of their potential to contribute to the mitigation of climate change by reducing fossil fuel use or by providing feedstock for the emerging biobased economies where fossil sources of energy and industrial raw materials are replaced in part by sustainable and renewable biomass resources. The aim of this review was to collate the current knowledge regarding the capacity of legumes to (1) lower the emissions of the key greenhouse gases carbon dioxide (CO2) and nitrous oxide (N2O) compared to N-fertilized systems, (2) reduce the fossil energy used in the production of food and forage, (3) contribute to the sequestration of carbon (C) in soils, and (4) provide a viable source of biomass for the generation of biofuels and other materials in future biorefinery concepts. We estimated that globally between 350 and 500\u00a0Tg\u00a0CO2 could be emitted as a result of the 33 to 46\u00a0Tg\u00a0N that is biologically fixed by agricultural legumes each year. This compares to around 300\u00a0Tg\u00a0CO2 released annually from the manufacture of 100\u00a0Tg fertilizer N. The main difference is that the CO2 respired from the nodulated roots of N2-fixing legumes originated from photosynthesis and will not represent a net contribution to atmospheric concentrations of CO2, whereas the CO2 generated during the synthesis of N fertilizer was derived from fossil fuels. Experimental measures of total N2O fluxes from legumes and N-fertilized systems were found to vary enormously (0.03\u20137.09 and 0.09\u201318.16\u00a0kg\u00a0N2O\u2013N\u00a0ha\u22121, respectively). This reflected the data being collated from a diverse range of studies using different rates of N inputs, as well as the large number of climatic, soil, and management variables known to influence denitrification and the portion of the total N lost as N2O. Averages across 71 site-years of data, soils under legumes emitted a total of 1.29\u00a0kg\u00a0N2O\u2013N\u00a0ha\u22121 during a growing season. This compared to a mean of 3.22\u00a0kg\u00a0N2O\u2013N\u00a0ha\u22121 from 67 site-years of N-fertilized crops and pastures, and 1.20\u00a0kg\u00a0N2O\u2013N\u00a0ha\u22121 from 33 site-years of data collected from unplanted soils or unfertilized non-legumes. It was concluded that there was little evidence that biological N2 fixation substantially contributed to total N2O emissions, and that losses of N2O from legume soil were generally lower than N-fertilized systems, especially when commercial rates of N fertilizer were applied. Elevated rates of N2O losses can occur following the termination of legume-based pastures, or where legumes had been green- or brown-manured and there was a rapid build-up of high concentrations of nitrate in soil. Legume crops and legume-based pastures use 35% to 60% less fossil energy than N-fertilized cereals or grasslands, and the inclusion of legumes in cropping sequences reduced the average annual energy usage over a rotation by 12% to 34%. The reduced energy use was primarily due to the removal of the need to apply N fertilizer and the subsequently lower N fertilizer requirements for crops grown following legumes. Life cycle energy balances of legume-based rotations were also assisted by a lower use of agrichemicals for crop protection as diversification of cropping sequences reduce the incidence of cereal pathogens and pests and assisted weed control, although it was noted that differences in fossil energy use between legumes and N-fertilized systems were greatly diminished if energy use was expressed per unit of biomass or grain produced. For a change in land use to result in a net increase C sequestration in soil, the inputs of C remaining in plant residues need to exceed the CO2 respired by soil microbes during the decomposition of plant residues or soil organic C, and the C lost through wind or water erosion. The net N-balance of the system was a key driver of changes in soil C stocks in many environments, and data collected from pasture, cropping, and agroforestry systems all indicated that legumes played a pivotal role in providing the additional organic N required to encourage the accumulation of soil C at rates greater than can be achieved by cereals or grasses even when they were supplied with N fertilizer. Legumes contain a range of compounds, which could be refined to produce raw industrial materials currently manufactured from petroleum-based sources, pharmaceuticals, surfactants, or food additives as valuable by-products if legume biomass was to be used to generate biodiesel, bioethanol, biojet A1 fuel, or biogas. The attraction of using leguminous material feedstock is that they do not need the inputs of N fertilizer that would otherwise be necessary to support the production of high grain yields or large amounts of plant biomass since it is the high fossil energy use in the synthesis, transport, and application of N fertilizers that often negates much of the net C benefits of many other bioenergy sources. The use of legume biomass for biorefineries needs careful thought as there will be significant trade-offs with the current role of legumes in contributing to the organic fertility of soils. Agricultural systems will require novel management and plant breeding solutions to provide the range of options that will be required to mitigate climate change. Given their array of ecosystem services and their ability to reduce greenhouse gas emissions, lower the use of fossil energy, accelerate rates of C sequestration in soil, and provide a valuable source of feedstock for biorefineries, legumes should be considered as important components in the development of future agroecosystems.", "keywords": ["Carbon sequestration", "2. Zero hunger", "[SDV.SA] Life Sciences [q-bio]/Agricultural sciences", "571", "04 agricultural and veterinary sciences", "15. Life on land", "Legumes", "Air and water emissions", "Greenhouses and coverings", "7. Clean energy", "Biorefinery", "12. Responsible consumption", "[SDV.EE] Life Sciences [q-bio]/Ecology", " environment", "Greenhouse gases", "2305 Environmental Engineering", "13. Climate action", "Biological N2 fixation", "Biofuels", "11. Sustainability", "Farm nutrient management", "0401 agriculture", " forestry", " and fisheries", "Recycling", " balancing and resource management", "1102 Agronomy and Crop Science"]}, "links": [{"href": "https://doi.org/10.1007/s13593-011-0056-7"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agronomy%20for%20Sustainable%20Development", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s13593-011-0056-7", "name": "item", "description": "10.1007/s13593-011-0056-7", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s13593-011-0056-7"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-10-19T00:00:00Z"}}, {"id": "10.1016/j.agee.2013.02.003", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-30T16:15:55Z", "type": "Journal Article", "created": "2013-03-21", "title": "Managing soil carbon for climate change mitigation and adaptation in Mediterranean cropping systems: A meta-analysis", "description": "Mediterranean croplands are seasonally dry agroecosystems with low soil organic carbon (SOC) content and high risk of land degradation and desertification. The increase in SOC is of special interest in these systems, as it can help to build resilience for climate change adaptation while contributing to mitigate global warming through the sequestration of atmospheric carbon (C). We compared SOC change and C sequestration under a number of recommended management practices (RMPs) with neighboring conventional plots under Mediterranean climate (174 data sets from 79 references). The highest response in C sequestration was achieved by those practices applying largest amounts of C inputs (land treatment and organic amendments). Conservation tillage practices (no-tillage and reduced tillage) induced lower effect sizes but significantly promoted C sequestration, whereas no effect and negative net sequestration rates were observed for slurry applications and unfertilized treatments, respectively. Practices combining external organic amendments with cover crops or conservation tillage (combined management practices and organic management) showed very good performance in C sequestration. We studied separately the changes in SOC under organic management, with 80 data sets from 30 references. The results also suggest that the degree of intensification in C input rate is the main driver behind the relative C accumulation in organic treatments. Thus, highest net C sequestration rates were observed in most eco-intensive groups, such as \u201cirrigated\u201d, \u201chorticulture\u201d and controlled experiments (\u201cplot scale\u201d).", "keywords": ["2. Zero hunger", "Soil", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "Air and water emissions", "01 natural sciences", "6. Clean water", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2013.02.003"}, {"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.2013.02.003", "name": "item", "description": "10.1016/j.agee.2013.02.003", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2013.02.003"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-03-01T00:00:00Z"}}, {"id": "10.1016/j.envpol.2011.02.024", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-30T16:16:35Z", "type": "Journal Article", "created": "2011-06-08", "title": "Developments In Greenhouse Gas Emissions And Net Energy Use In Danish Agriculture - How To Achieve Substantial Co2 Reductions?", "description": "Greenhouse gas (GHG) emissions from agriculture are a significant contributor to total Danish emissions. Consequently, much effort is currently given to the exploration of potential strategies to reduce agricultural emissions. This paper presents results from a study estimating agricultural GHG emissions in the form of methane, nitrous oxide and carbon dioxide (including carbon sources and sinks, and the impact of energy consumption/bioenergy production) from Danish agriculture in the years 1990-2010. An analysis of possible measures to reduce the GHG emissions indicated that a 50-70% reduction of agricultural emissions by 2050 relative to 1990 is achievable, including mitigation measures in relation to the handling of manure and fertilisers, optimization of animal feeding, cropping practices, and land use changes with more organic farming, afforestation and energy crops. In addition, the bioenergy production may be increased significantly without reducing the food production, whereby Danish agriculture could achieve a positive energy balance.", "keywords": ["Buildings and machinery", "Greenhouse Effect", "Landscape and recreation", "Livestock", "Denmark", "Nitrous Oxide", "Air and water emissions", "Models", " Biological", "7. Clean energy", "01 natural sciences", "12. Responsible consumption", "Soil", "11. Sustainability", "Farm nutrient management", "Animals", "Animal Husbandry", "Fertilizers", "0105 earth and related environmental sciences", "2. Zero hunger", "Air Pollutants", "Nutrient turnover", "Agriculture", "04 agricultural and veterinary sciences", "Carbon Dioxide", "15. Life on land", "Manure", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Environmental Monitoring"]}, "links": [{"href": "https://doi.org/10.1016/j.envpol.2011.02.024"}, {"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.2011.02.024", "name": "item", "description": "10.1016/j.envpol.2011.02.024", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.envpol.2011.02.024"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-11-01T00:00:00Z"}}, {"id": "10.1016/j.soilbio.2015.10.008", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-30T16:17:34Z", "type": "Journal Article", "created": "2015-11-10", "title": "Evidence For Denitrification As Main Source Of N2o Emission From Residue-Amended Soil", "description": "Catch crops, especially leguminous catch crops, may increase crop nitrogen (N) supply and decrease environmental impacts in cropping systems, but they may also stimulate nitrous oxide (N2O) emissions following spring incorporation. In this 28-day laboratory incubation study, we examined the carbon (C) and N dynamics and N2O evolution after simulated incorporation of residues from three catch crop species into a loamy sand soil, with variable soil moisture (40, 50 or 60% water-filled pore space (WFPS)). The catch crops include two leguminous (red clover and winter vetch) and one non-leguminous species (ryegrass). Plant material was placed in a discrete layer surrounded by soil in which the nitrate (NO3\u2212) pool was enriched with 15N to distinguish N2O derived from denitrification and nitrification. Net N mineralisation from leguminous catch crops was significant (30\u201348\u00a0mg\u00a0N\u00a0kg\u22121 soil, accounting for 41\u201356% of the added residue-N), whereas ryegrass incorporation resulted in net N immobilisation. The evolution of N2O was probably enhanced by N release from the residues, especially during the second week, which can explain the lower N2O evolution after application of ryegrass. Emission of N2O occurred at all moisture levels, but was higher at 50 and 60% WFPS than at 40% in soil with leguminous residues. The 15N enrichment of N2O indicated that denitrification was the dominant source independent of moisture level and residue type. We conclude that catch crop residues will stimulate N2O emissions via denitrification over a wide range of soil moisture conditions, but that emission levels may depend significantly on residue quality and soil moisture.", "keywords": ["Leguminous cover crop", "2. Zero hunger", "Nitrous oxide", "15N labelling", "Nutrient turnover", "Mineralisation", "04 agricultural and veterinary sciences", "incubation", "15. Life on land", "Air and water emissions", "Pasture and forage crops", "Crop combinations and interactions", "13. Climate action", "Farm nutrient management", "Denitrification", "0401 agriculture", " forestry", " and fisheries", "Incubation"]}, "links": [{"href": "https://doi.org/10.1016/j.soilbio.2015.10.008"}, {"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.2015.10.008", "name": "item", "description": "10.1016/j.soilbio.2015.10.008", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.soilbio.2015.10.008"}, {"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": "10.1017/s0021859605005812", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-30T16:17:56Z", "type": "Journal Article", "created": "2006-02-10", "title": "Estimated N Leaching Losses For Organic And Conventional Farming In Denmark", "description": "<p>The impact of organic, compared with conventional, farming practices on N leaching loss was studied for Danish mixed dairy and arable farms using an N balance approach based on representative data. On mixed dairy farms, a simple N balance method was used to estimate N surplus and N leaching loss. On arable farms, the simple N balance method was unreliable due to changes in the soil N pool. Consequently, the Farm ASSEssment Tool (FASSET) simulation model was used to estimate N surplus, N leaching loss and the changes in the soil N pool.</p><p>The study found a lower N leaching loss from organic than conventional mixed dairy farms, primarily due to lower N inputs. On organic arable farms, the soil N pool increased over time but the N leaching loss was comparable with conventional arable farms. The soil N pool was increased primarily by organic farming practices and incorporation of straw. The highest increase in the soil N pool was seen on soils with a low initial level of organic matter. The N leaching loss was dependent on soil type, the use of catch crops and the level of soil organic matter, whereas incorporation of straw had a minor effect. N leaching was highest on sandy soils with a high level of soil organic matter and no catch crops. The present results stress the importance of using representative data from organic and conventional farming practices in comparative studies of N leaching loss. Lack of representative data has been a major weakness of previous comparisons on N leaching losses on organic and conventional farms.</p>", "keywords": ["2. Zero hunger", "Nutrient turnover", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "Air and water emissions", "Farming Systems"]}, "links": [{"href": "https://doi.org/10.1017/s0021859605005812"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/The%20Journal%20of%20Agricultural%20Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1017/s0021859605005812", "name": "item", "description": "10.1017/s0021859605005812", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1017/s0021859605005812"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2006-02-10T00:00:00Z"}}, {"id": "10.1079/sum2005326", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-30T16:18:44Z", "type": "Journal Article", "created": "2006-03-06", "title": "Pore Characteristics And Hydraulic Properties Of A Sandy Loam Supplied For A Century With Either Animal Manure Or Mineral Fertilizers", "description": "Application of organic residues to soil is generally assumed to improve soil tilth. Only few studies have reported on the long-term effects on the more subtle aspects of soil porosity and no reports have considered the potential effects of organic amendments on the pore system in the subsoil. We sampled undisturbed soil cores (100 cm3 and 6280 cm3) in metal cylinders in differently fertilized plots in the long-term field experiments at Askov Experimental Station, Denmark. We selected the 0-60 cm soil layer of plots dressed for a century with either mineral fertilizers (labelled NPK) or animal manure (labelled AM). Both fertilization treatments were studied at two levels of nutrient application: 'normal' (labelled '1') and 1.5 times 'normal' (labelled '11/2'). Plots unfertilized for a century (labelled UNF) were included as a reference for some of the studies. Water retention, air permeability and air diffusivity were measured on the small cores, and we used the large cores for measuring near-saturated and saturated hydraulic conductivity. In the plough layer, the AM and NPK soils displayed identical pore volumes in size fractions larger as well as smaller than 30 micrometer, while the UNF soil had a significantly smaller volume of pores <30 micrometer. No clear trends were found in treatment effects on pore organization calculated from air diffusivity and air permeability measurements. No significant differences in hydraulic conductivity were found for plough layer soil. For the soil below ploughing depth, significantly larger macropore volumes and near-saturated hydraulic conductivities were found for soil receiving the higher ('11/2') amount of nutrients compared with the 'normally' dressed soil. This effect was independent of fertilization system (AM or NPK). We attribute the larger volume of macropores to the improved root growth conditions in the soil with the larger nutrient level. We conclude that addition of animal manure in rates realistic in agriculture has only a modest effect on soil pore characteristics of the plough layer soil compared with the use of mineral fertilizers. For the soil below ploughing depth, a high level of nutrient application rather than the use of animal manure may increase soil macroporosity and near-saturated hydraulic conductivity.", "keywords": ["2. Zero hunger", "Crop combinations and interactions", "Soil biology", "Nutrient turnover", "Composting and manuring", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "Air and water emissions", "Soil quality", "Soil tillage", "6. Clean water"]}, "links": [{"href": "https://doi.org/10.1079/sum2005326"}, {"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": "10.1079/sum2005326", "name": "item", "description": "10.1079/sum2005326", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1079/sum2005326"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-09-01T00:00:00Z"}}, {"id": "10.1111/j.1757-1707.2011.01132.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-30T16:19:47Z", "type": "Journal Article", "created": "2011-11-22", "title": "Consequences Of Field N2o Emissions For The Environmental Sustainability Of Plant-Based Biofuels Produced Within An Organic Farming System", "description": "Abstract<p>One way of reducing the emissions of fossil fuel\uffe2\uff80\uff90derived carbon dioxide (CO2) is to replace fossil fuels with biofuels produced from agricultural biomasses or residuals. However, cultivation of soils results in emission of other greenhouse gases (GHGs), especially nitrous oxide (N2O). Previous studies on biofuel production systems showed that emissions of N2O may counterbalance a substantial part of the global warming reduction, which is achieved by fossil fuel displacement. In this study, we related measured field emissions of N2O to the reduction in fossil fuel\uffe2\uff80\uff90derived CO2, which was obtained when agricultural biomasses were used for biofuel production. The analysis included five organically managed feedstocks (viz. dried straw of sole cropped rye, sole cropped vetch and intercropped rye\uffe2\uff80\uff93vetch, as well as fresh grass\uffe2\uff80\uff93clover and whole crop maize) and three scenarios for conversion of biomass into biofuel. The scenarios were (i) bioethanol, (ii) biogas and (iii) coproduction of bioethanol and biogas. In the last scenario, the biomass was first used for bioethanol fermentation and subsequently the effluent from this process was utilized for biogas production. The net GHG reduction was calculated as the avoided fossil fuel\uffe2\uff80\uff90derived CO2, where the N2O emission was subtracted. This value did not account for fossil fuel\uffe2\uff80\uff90derived CO2 emissions from farm machinery and during conversion processes that turn biomass into biofuel. The greatest net GHG reduction, corresponding to 700\uffe2\uff80\uff93800\uffc2\uffa0g\uffc2\uffa0CO2\uffc2\uffa0m\uffe2\uff88\uff922, was obtained by biogas production or coproduction of bioethanol and biogas on either fresh grass\uffe2\uff80\uff93clover or whole crop maize. In contrast, biofuel production based on lignocellulosic crop residues (i.e. rye and vetch straw) provided considerably lower net GHG reductions (\uffe2\uff89\uffa4215\uffc2\uffa0g\uffc2\uffa0CO2\uffc2\uffa0m\uffe2\uff88\uff922), and even negative numbers sometimes. No GHG benefit was achieved by fertilizing the maize crop because the extra crop yield, and thereby increased biofuel production, was offset by enhanced N2O emissions.</p>", "keywords": ["2. Zero hunger", "Pasture and forage crops", "Nutrient turnover", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "Cereals", " pulses and oilseeds", "Air and water emissions", "7. Clean energy"]}, "links": [{"href": "https://doi.org/10.1111/j.1757-1707.2011.01132.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/GCB%20Bioenergy", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1757-1707.2011.01132.x", "name": "item", "description": "10.1111/j.1757-1707.2011.01132.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1757-1707.2011.01132.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-11-22T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Air+and+water+emissions&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=Air+and+water+emissions&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=Air+and+water+emissions&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Air+and+water+emissions&offset=9", "hreflang": "en-US"}], "numberMatched": 9, "numberReturned": 9, "distributedFeatures": [], "timeStamp": "2026-05-31T03:00:03.437547Z"}