The recent increase in conservation tillage offers the possible benefit of decreasing soil compaction risk by wheeling. Excessive compaction has damaging consequences for agriculture and the environment. Direct drilling is likely to change soil porosity and soil carbon content in the long term. This paper analyses the effect of both of these factors on soil mechanical strength through measurements of the compression index Cc, the swelling index Cs, and the pre\uffe2\uff80\uff90compression stress pc*. Oedometer tests were performed on remoulded soils taken from an experiment with a wheat\uffe2\uff80\uff90maize rotation, where three soil tillage systems were compared over 31 years: annual mouldboard ploughing, superficial tillage (10\uffe2\uff80\uff83cm depth), and no tillage. The results show that initial structural porosity (i.e. macro\uffe2\uff80\uff90porosity) increased Cc slightly and decreased pc* exponentially. Consequently, the risk of compaction in the direct drilling systems should decrease when a decrease in soil porosity is found, compared with conventional systems. However, this change in soil porosity in direct drilling is not always observed. The other variables that can be influenced by tillage system, i.e. carbon content or soil moisture, have also been examined to assess the possible benefit of direct drilling on soil compaction risk. For soils with similar initial structural porosity, our results show that the increase in carbon content of the superficial soil layers in direct drilling systems tends to increase the soil\uffe2\uff80\uff99s susceptibility to compaction by increasing Cc in wet conditions and by decreasing pc* in dry conditions. Moisture conditions at wheeling determine the degree of soil compaction as a function of tillage system.
Sensibilit\uffc3\uffa9 des sols au tassement par les engins agricoles: analyse de l\uffe2\uff80\uff99effet du travail du sol pour un sol limoneux
R\uffc3\uffa9sum\uffc3\uffa9L\uffe2\uff80\uff99adoption croissante du semis direct pourrait permettre de diminuer le risque de tassement des sols lors du passage des engins agricoles. Les tassements s\uffc3\uffa9v\uffc3\uffa8res du sol ont des cons\uffc3\uffa9quences importantes sur l\uffe2\uff80\uff99environnement et l\uffe2\uff80\uff99agriculture. A long\uffe2\uff80\uff90terme, la technique du semis direct modifie la porosit\uffc3\uffa9 et la teneur en carbone du sol. Cet article propose de quantifier l\uffe2\uff80\uff99effet de ces deux facteurs sur la r\uffc3\uffa9sistance m\uffc3\uffa9caniques du sol par des mesures de l\uffe2\uff80\uff99indice de compression Cc, de l\uffe2\uff80\uff99indice recompression Cs et de la pression de preconsolidation pc*. Des essais oedom\uffc3\uffa9triques ont \uffc3\uffa9t\uffc3\uffa9 r\uffc3\uffa9alis\uffc3\uffa9s sur des \uffc3\uffa9chantillons de sols remani\uffc3\uffa9s (sol limoneux) pr\uffc3\uffa9lev\uffc3\uffa9s sur un essai comparant trois syst\uffc3\uffa8mes de travail du sol depuis 31 ans pour une rotation bl\uffc3\uffa9/ma\uffc3\uffafs: labour, travail superficiel (10\uffe2\uff80\uff83cm), semis direct. Les r\uffc3\uffa9sultats montrent que la macroporosit\uffc3\uffa9 appel\uffc3\uffa9e porosit\uffc3\uffa9 structurale du sol induit une faible augmentation de Cc et une d\uffc3\uffa9croissance exponentielle de pc*. Ceci doit diminuer le risque de tassement dans les syst\uffc3\uffa8mes o\uffc3\uffb9 le semis direct s\uffe2\uff80\uff99accompagne d\uffe2\uff80\uff99une r\uffc3\uffa9duction de la porosit\uffc3\uffa9. Cette \uffc3\uffa9volution de la porosit\uffc3\uffa9 en semis direct n\uffe2\uff80\uff99est cependant pas syst\uffc3\uffa9matique. L\uffe2\uff80\uff99effet des autres facteurs doit \uffc3\uffaatre consid\uffc3\uffa9r\uffc3\uffa9, \uffc3\uffa0 savoir teneur en eau et teneur en carbone. Nos r\uffc3\uffa9sultats montrent que pour des sols de m\uffc3\uffaame porosit\uffc3\uffa9 structurale, l\uffe2\uff80\uff99augmentation de la teneur en carbone des horizons superficiels dans les syst\uffc3\uffa8mes en semis direct a tendance \uffc3\uffa0 augmenter la sensibilit\uffc3\uffa9 du sol au tassement par une augmentation Cc en conditions humides et une diminution de pc* en conditions s\uffc3\uffa8ches. Les conditions hydriques d\uffe2\uff80\uff99intervention ont donc un effet d\uffc3\uffa9terminant sur la sensibilit\uffc3\uffa9 du sol au tassement selon les modalit\uffc3\uffa9s de travail du sol.
", "keywords": ["WATER-CONTENT", "2. Zero hunger", "UNIAXIAL COMPACTION", "POROSITY", "04 agricultural and veterinary sciences", "15. Life on land", "INDICE DE COMPRESSION", "6. Clean water", "ORGANIC-MATTER", "HYDRAULIC-PROPERTIES", "DENSITY", "STRENGTH", "0401 agriculture", " forestry", " and fisheries", "COMPRESSION", "AGRICULTURAL SOILS", "ARABLE SOILS", "[SDV.SA.SDS] Life Sciences [q-bio]/Agricultural sciences/Soil study"]}, "links": [{"href": "https://doi.org/10.1111/j.1365-2389.2006.00798.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/European%20Journal%20of%20Soil%20Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1365-2389.2006.00798.x", "name": "item", "description": "10.1111/j.1365-2389.2006.00798.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-2389.2006.00798.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2007-01-31T00:00:00Z"}}, {"id": "10.1007/s11104-019-03939-9", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:52Z", "type": "Journal Article", "created": "2019-02-01", "title": "Surface tension, rheology and hydrophobicity of rhizodeposits and seed mucilage influence soil water retention and hysteresis", "description": "Rhizodeposits collected from hydroponic solutions with roots of maize and barley, and seed mucilage washed from chia, were added to soil to measure their impact on water retention and hysteresis in a sandy loam soil at a range of concentrations. We test the hypothesis that the effect of plant exudates and mucilages on hydraulic properties of soils depends on their physicochemical characteristics and origin.Surface tension and viscosity of the exudate solutions were measured using the Du No\u00fcy ring method and a cone-plate rheometer, respectively. The contact angle of water on exudate treated soil was measured with the sessile drop method. Water retention and hysteresis were measured by equilibrating soil samples, treated with exudates and mucilages at 0.46 and 4.6\u00a0mg\u00a0g-1 concentration, on dialysis tubing filled with polyethylene glycol (PEG) solution of known osmotic potential.Surface tension decreased and viscosity increased with increasing concentration of the exudates and mucilage in solutions. Change in surface tension and viscosity was greatest for chia seed exudate and least for barley root exudate. Contact angle increased with increasing maize root and chia seed exudate concentration in soil, but not barley root. Chia seed mucilage and maize root rhizodeposits enhanced soil water retention and increased hysteresis index, whereas barley root rhizodeposits decreased soil water retention and the hysteresis effect. The impact of exudates and mucilages on soil water retention almost ceased when approaching wilting point at -1500\u00a0kPa matric potential.Barley rhizodeposits behaved as surfactants, drying the rhizosphere at smaller suctions. Chia seed mucilage and maize root rhizodeposits behaved as hydrogels that hold more water in the rhizosphere, but with slower rewetting and greater hysteresis.", "keywords": ["DYNAMICS", "/dk/atira/pure/subjectarea/asjc/1100/1111", "seed exudate", "FLOW", "QH301 Biology", "/dk/atira/pure/subjectarea/asjc/1100/1110", "root exudate", "630", "QH301", "soil water retention", "ROOT", "surface tension", "DIMR 646809", "Contact angle", "contact angle", "PHOSPHOLIPID SURFACTANTS", "2. Zero hunger", "STABILITY", "BB/J000868/1", "Surface tension", "Civil_env_eng", "Viscosity", "Hysteresis", "name=Soil Science", "Root exudate", "RHIZOSPHERE HYDRAULIC-PROPERTIES", "EXUDATION", "Regular Article", "04 agricultural and veterinary sciences", "15. Life on land", "540", "Soil water retention", "6. Clean water", "Seed exudate", "BB/J011460/1", "hysteresis", "BB/L026058/1", "viscosity", "Biotechnology and Biological Sciences Research Council (BBSRC)", "0401 agriculture", " forestry", " and fisheries", "name=Plant Science", "MAIZE", "BB/P004180/1", "European Research Council"]}, "links": [{"href": "https://repository.uwl.ac.uk/id/eprint/5787/1/Naveed2019_Article_SurfaceTensionRheologyAndHydro.pdf"}, {"href": "https://eprints.soton.ac.uk/428238/1/Naveed2019_Article_SurfaceTensionRheologyAndHydro.pdf"}, {"href": "http://link.springer.com/content/pdf/10.1007/s11104-019-03939-9.pdf"}, {"href": "https://doi.org/10.1007/s11104-019-03939-9"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-019-03939-9", "name": "item", "description": "10.1007/s11104-019-03939-9", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-019-03939-9"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-02-02T00:00:00Z"}}, {"id": "2164/11863", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:25:36Z", "type": "Journal Article", "created": "2019-02-01", "title": "Surface tension, rheology and hydrophobicity of rhizodeposits and seed mucilage influence soil water retention and hysteresis", "description": "Rhizodeposits collected from hydroponic solutions with roots of maize and barley, and seed mucilage washed from chia, were added to soil to measure their impact on water retention and hysteresis in a sandy loam soil at a range of concentrations. We test the hypothesis that the effect of plant exudates and mucilages on hydraulic properties of soils depends on their physicochemical characteristics and origin.Surface tension and viscosity of the exudate solutions were measured using the Du No\u00fcy ring method and a cone-plate rheometer, respectively. The contact angle of water on exudate treated soil was measured with the sessile drop method. Water retention and hysteresis were measured by equilibrating soil samples, treated with exudates and mucilages at 0.46 and 4.6\u00a0mg\u00a0g-1 concentration, on dialysis tubing filled with polyethylene glycol (PEG) solution of known osmotic potential.Surface tension decreased and viscosity increased with increasing concentration of the exudates and mucilage in solutions. Change in surface tension and viscosity was greatest for chia seed exudate and least for barley root exudate. Contact angle increased with increasing maize root and chia seed exudate concentration in soil, but not barley root. Chia seed mucilage and maize root rhizodeposits enhanced soil water retention and increased hysteresis index, whereas barley root rhizodeposits decreased soil water retention and the hysteresis effect. The impact of exudates and mucilages on soil water retention almost ceased when approaching wilting point at -1500\u00a0kPa matric potential.Barley rhizodeposits behaved as surfactants, drying the rhizosphere at smaller suctions. 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Clean water", "Seed exudate", "BB/J011460/1", "hysteresis", "BB/L026058/1", "viscosity", "Biotechnology and Biological Sciences Research Council (BBSRC)", "0401 agriculture", " forestry", " and fisheries", "name=Plant Science", "MAIZE", "BB/P004180/1", "European Research Council"]}, "links": [{"href": "https://repository.uwl.ac.uk/id/eprint/5787/1/Naveed2019_Article_SurfaceTensionRheologyAndHydro.pdf"}, {"href": "https://eprints.soton.ac.uk/428238/1/Naveed2019_Article_SurfaceTensionRheologyAndHydro.pdf"}, {"href": "http://link.springer.com/content/pdf/10.1007/s11104-019-03939-9.pdf"}, {"href": "https://doi.org/2164/11863"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "2164/11863", "name": "item", "description": "2164/11863", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2164/11863"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-02-02T00:00:00Z"}}, {"id": "2164/6134", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:25:37Z", "type": "Journal Article", "created": "2016-05-13", "title": "Modeling Soil Processes: Review, Key Challenges, and New Perspectives", "description": "Core Ideas
A community effort is needed to move soil modeling forward.
Establishing an international soil modeling consortium is key in this respect.
There is a need to better integrate existing knowledge in soil models.
Integration of data and models is a key challenge in soil modeling.
The remarkable complexity of soil and its importance to a wide range of ecosystem services presents major challenges to the modeling of soil processes. Although major progress in soil models has occurred in the last decades, models of soil processes remain disjointed between disciplines or ecosystem services, with considerable uncertainty remaining in the quality of predictions and several challenges that remain yet to be addressed. First, there is a need to improve exchange of knowledge and experience among the different disciplines in soil science and to reach out to other Earth science communities. Second, the community needs to develop a new generation of soil models based on a systemic approach comprising relevant physical, chemical, and biological processes to address critical knowledge gaps in our understanding of soil processes and their interactions. Overcoming these challenges will facilitate exchanges between soil modeling and climate, plant, and social science modeling communities. It will allow us to contribute to preserve and improve our assessment of ecosystem services and advance our understanding of climate\uffe2\uff80\uff90change feedback mechanisms, among others, thereby facilitating and strengthening communication among scientific disciplines and society. We review the role of modeling soil processes in quantifying key soil processes that shape ecosystem services, with a focus on provisioning and regulating services. We then identify key challenges in modeling soil processes, including the systematic incorporation of heterogeneity and uncertainty, the integration of data and models, and strategies for effective integration of knowledge on physical, chemical, and biological soil processes. We discuss how the soil modeling community could best interface with modern modeling activities in other disciplines, such as climate, ecology, and plant research, and how to weave novel observation and measurement techniques into soil models. We propose the establishment of an international soil modeling consortium to coherently advance soil modeling activities and foster communication with other Earth science disciplines. Such a consortium should promote soil modeling platforms and data repository for model development, calibration and intercomparison essential for addressing contemporary challenges.
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Zero hunger", "Agriculture", "diffuse-reflectance spectroscopy", "4106 Soil sciences", "ORGANIC-MATTER", "digital elevation model", "SDG 13 \u2013 Ma\u00dfnahmen zum Klimaschutz", "Sciences du vivant", "Uncertainty analysis", "0406 Physical Geography and Environmental Geoscience", "Life Sciences & Biomedicine", "Crop and Pasture Production", "101028 Mathematical modelling", "international soil modeling consortium", "[SDU.STU]Sciences of the Universe [physics]/Earth Sciences", "Environmental Sciences & Ecology", "arbuscular mycorrhizal fungi", "Ecosystems", "Climate models", "QH301", "Environmental sciences & ecology", "Life Science", "SEDIMENT TRANSPORT MODELS", "data integration", "sediment transport models", "approche ecosyst\u00e9mique", "0105 earth and related environmental sciences", "info:eu-repo/classification/ddc/550", "3707 Hydrology", "soil modeling", "ROOT WATER-UPTAKE", "SOLUTE TRANSPORT", "13. Climate action", "Earth and Environmental Sciences", "Soil Sciences", "[SDU.STU] Sciences of the Universe [physics]/Earth Sciences", "Earth Sciences", "Earth sciences & physical geography", "Soils", "101028 Mathematische Modellierung", "saturated-unsaturated flow", "Environmental Sciences", "root water-uptake", " sediment transport models", " diffuse-reflectance spectroscopy", " arbuscular mycorrhizal fungi", " multiple ecosystem services", " saturated-unsaturated flow", " ground-penetrating radar", " synthetic-aperture radar", " digital elevation model", " organic-matter dynamics."]}, "links": [{"href": "https://orbi.uliege.be/bitstream/2268/263634/1/Vereecken%20VZJ%202016.pdf"}, {"href": "http://onlinelibrary.wiley.com/wol1/doi/10.2136/vzj2015.09.0131/fullpdf"}, {"href": "https://escholarship.org/content/qt6976n34c/qt6976n34c.pdf"}, {"href": "https://doi.org/2164/6134"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Vadose%20Zone%20Journal", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "2164/6134", "name": "item", "description": "2164/6134", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2164/6134"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-05-01T00:00:00Z"}}, {"id": "a7d22f2e965847b6231d5104b5a0dc7b", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:30:46Z", "type": "Dataset", "language": "en", "title": "3D Soil Hydraulic Database of Europe at 1 km and 250 m resolution", "description": "A consistent spatial soil hydraulic database at 7 soil depths up to 2 m calculated for Europe based on SoilGrids250m and 1 km datasets and pedotransfer functions trained on the European Hydropedological Data Inventory. Saturated water content, water content at field capacity and wilting point, saturated hydraulic conductivity and Mualem-van Genuchten parameters for the description of the moisture retention, and unsaturated hydraulic conductivity curves have been predicted. The derived 3D soil hydraulic layers (EU-SoilHydroGrids ver1.0) can be used for environmental modelling purposes at catchment or continental scale in Europe. 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