The Experts below are selected from a list of 178344 Experts worldwide ranked by ideXlab platform
Daniel Cluzeau - One of the best experts on this subject based on the ideXlab platform.
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Indicators of earthworm bioturbation to improve visual assessment of Soil Structure
Soil and Tillage Research, 2017Co-Authors: Denis Piron, Hubert Boizard, Djilali Heddadj, Guénola Pérès, Vincent Hallaire, Daniel CluzeauAbstract:Abstract Earthworm bioturbation, a biological process that strongly influences Soil Structure dynamics, is attracting more interest with the development of no-tillage farming. However, while methods for Visual Soil Structure Assessment (VSSA) are of great use to agronomists working to improve crop management and preserve Soil Structure, few methods have indicators that consider earthworm bioStructures. One reason is that VSSA methods were initially created for conventional tillage systems, where tillage and compaction are the main drivers of Soil Structure over time, while bioturbation is a secondary driver. However, bioturbation is now recognised as an important process for Soil functioning under no-tillage and reduced tillage systems. Among bioStructures, the presence of burrows is one frequently-used indicator, but casts are rarely studied in the field, except in the “Soil-Structure Patterns” method (SSP), which provides a typology of Soil Structure that includes earthworm features. However the SSP typology appears complex (11 patterns), and implementing the method is time consuming. To improve VSSA methods, we identified patterns to define new indicators of earthworm bioturbation. We first assessed whether the patterns identified were useful for highlighting the real impact of bioturbation on the distribution of Soil Structures and the impact of tillage on earthworm activity. We then applied the pattern descriptions to the “profil cultural” method, which provides a detailed assessment of Soil Structure in the Soil profile. This study was performed at two experimental sites in France experiencing different types of Soil impacts (i.e. tillage, compaction). Identifying patterns in Soil morphological units helped us to define four types of bioturbation: (1) type 0: no visible bioturbation; (2) type 1: presence of burrows; (3) type 2: presence of a few fresh cast aggregates; and (4) type 3: high presence of casts in different welded states. This new typology seemed relevant and complementary to typical indicators. When applied to the “profil cultural” method, these bioturbation indicators can improve the assessment of the Soil Structure usually provided by VSSA methods and provide more accurate information to agronomists and farmers about Soil functioning, including biological activities.
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Indicators of earthworm bioturbation to improve visual assessment of Soil Structure
Soil and Tillage Research, 2017Co-Authors: Denis Piron, Hubert Boizard, Djilali Heddadj, Guénola Pérès, Vincent Hallaire, Daniel CluzeauAbstract:Earthworm bioturbation, a biological process that strongly influences Soil Structure dynamics, is attracting more interest with the development of no-tillage farming. However, while methods for Visual Soil Structure Assessment (VSSA) are of great use to agronomists working to improve crop management and preserve Soil Structure, few methods have indicators that consider earthworm bioStructures. One reason is that VSSA methods were initially created for conventional tillage systems, where tillage and compaction are the main drivers of Soil Structure over time, while bioturbation is a secondary driver. However, bioturbation is now recognised as an important process for Soil functioning under no-tillage and reduced tillage systems. Among bioStructures, the presence of burrows is one frequently-used indicator, but casts are rarely studied in the field, except in the "Soil-Structure Patterns" method (SSP), which provides a typology of Soil Structure that includes earthworm features. However the SSP typology appears complex (11 patterns), and implementing the method is time consuming. To improve VSSA methods, we identified patterns to define new indicators of earthworm bioturbation. We first assessed whether the patterns identified were useful for highlighting the real impact of bioturbation on the distribution of Soil Structures and the impact of tillage on earthworm activity. We then applied the pattern descriptions to the "profil cultural" method, which provides a detailed assessment of Soil Structure in the Soil profile. This study was performed at two experimental sites in France experiencing different types of Soil impacts (i.e. tillage, compaction). Identifying patterns in Soil morphological units helped us to define four types of bioturbation: (1) type 0: no visible bioturbation; (2) type 1: presence of burrows; (3) type 2: presence of a few fresh cast aggregates; and (4) type 3: high presence of casts in different welded states. This new typology seemed relevant and complementary to typical indicators. When applied to the "profil cultural" method, these bioturbation indicators can improve the assessment of the Soil Structure usually provided by VSSA methods and provide more accurate information to agronomists and farmers about Soil functioning, including biological activities. (C) 2016 Elsevier B.V. All rights reserved.
Daniel L. Mummey - One of the best experts on this subject based on the ideXlab platform.
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Mycorrhizas and Soil Structure
New Phytologist, 2006Co-Authors: Matthias C. Rillig, Daniel L. MummeyAbstract:In addition to their well-recognized roles in plant nutrition and communities, mycorrhizas can influence the key ecosystem process of Soil aggregation. Here we review the contribution of mycorrhizas, mostly focused on arbuscular mycorrhizal fungi (AMF), to Soil Structure at various hierarchical levels: plant community; individual root; and the Soil mycelium. There are a suite of mechanisms by which mycorrhizal fungi can influence Soil aggregation at each of these various scales. By extension of these mechanisms to the question of fungal diversity, it is recognized that different species or communities of fungi can promote Soil aggregation to different degrees. We argue that Soil aggregation should be included in a more complete 'multifunctional' perspective of mycorrhizal ecology, and that in-depth understanding of mycorrhizas/Soil process relationships will require analyses emphasizing feedbacks between Soil Structure and mycorrhizas, rather than a uni-directional approach simply addressing mycorrhizal effects on Soils. We finish the discussion by highlighting new tools, developments and foci that will probably be crucial in further understanding mycorrhizal contributions to Soil Structure.
Denis Piron - One of the best experts on this subject based on the ideXlab platform.
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Indicators of earthworm bioturbation to improve visual assessment of Soil Structure
Soil and Tillage Research, 2017Co-Authors: Denis Piron, Hubert Boizard, Djilali Heddadj, Guénola Pérès, Vincent Hallaire, Daniel CluzeauAbstract:Abstract Earthworm bioturbation, a biological process that strongly influences Soil Structure dynamics, is attracting more interest with the development of no-tillage farming. However, while methods for Visual Soil Structure Assessment (VSSA) are of great use to agronomists working to improve crop management and preserve Soil Structure, few methods have indicators that consider earthworm bioStructures. One reason is that VSSA methods were initially created for conventional tillage systems, where tillage and compaction are the main drivers of Soil Structure over time, while bioturbation is a secondary driver. However, bioturbation is now recognised as an important process for Soil functioning under no-tillage and reduced tillage systems. Among bioStructures, the presence of burrows is one frequently-used indicator, but casts are rarely studied in the field, except in the “Soil-Structure Patterns” method (SSP), which provides a typology of Soil Structure that includes earthworm features. However the SSP typology appears complex (11 patterns), and implementing the method is time consuming. To improve VSSA methods, we identified patterns to define new indicators of earthworm bioturbation. We first assessed whether the patterns identified were useful for highlighting the real impact of bioturbation on the distribution of Soil Structures and the impact of tillage on earthworm activity. We then applied the pattern descriptions to the “profil cultural” method, which provides a detailed assessment of Soil Structure in the Soil profile. This study was performed at two experimental sites in France experiencing different types of Soil impacts (i.e. tillage, compaction). Identifying patterns in Soil morphological units helped us to define four types of bioturbation: (1) type 0: no visible bioturbation; (2) type 1: presence of burrows; (3) type 2: presence of a few fresh cast aggregates; and (4) type 3: high presence of casts in different welded states. This new typology seemed relevant and complementary to typical indicators. When applied to the “profil cultural” method, these bioturbation indicators can improve the assessment of the Soil Structure usually provided by VSSA methods and provide more accurate information to agronomists and farmers about Soil functioning, including biological activities.
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Indicators of earthworm bioturbation to improve visual assessment of Soil Structure
Soil and Tillage Research, 2017Co-Authors: Denis Piron, Hubert Boizard, Djilali Heddadj, Guénola Pérès, Vincent Hallaire, Daniel CluzeauAbstract:Earthworm bioturbation, a biological process that strongly influences Soil Structure dynamics, is attracting more interest with the development of no-tillage farming. However, while methods for Visual Soil Structure Assessment (VSSA) are of great use to agronomists working to improve crop management and preserve Soil Structure, few methods have indicators that consider earthworm bioStructures. One reason is that VSSA methods were initially created for conventional tillage systems, where tillage and compaction are the main drivers of Soil Structure over time, while bioturbation is a secondary driver. However, bioturbation is now recognised as an important process for Soil functioning under no-tillage and reduced tillage systems. Among bioStructures, the presence of burrows is one frequently-used indicator, but casts are rarely studied in the field, except in the "Soil-Structure Patterns" method (SSP), which provides a typology of Soil Structure that includes earthworm features. However the SSP typology appears complex (11 patterns), and implementing the method is time consuming. To improve VSSA methods, we identified patterns to define new indicators of earthworm bioturbation. We first assessed whether the patterns identified were useful for highlighting the real impact of bioturbation on the distribution of Soil Structures and the impact of tillage on earthworm activity. We then applied the pattern descriptions to the "profil cultural" method, which provides a detailed assessment of Soil Structure in the Soil profile. This study was performed at two experimental sites in France experiencing different types of Soil impacts (i.e. tillage, compaction). Identifying patterns in Soil morphological units helped us to define four types of bioturbation: (1) type 0: no visible bioturbation; (2) type 1: presence of burrows; (3) type 2: presence of a few fresh cast aggregates; and (4) type 3: high presence of casts in different welded states. This new typology seemed relevant and complementary to typical indicators. When applied to the "profil cultural" method, these bioturbation indicators can improve the assessment of the Soil Structure usually provided by VSSA methods and provide more accurate information to agronomists and farmers about Soil functioning, including biological activities. (C) 2016 Elsevier B.V. All rights reserved.
Matthias C. Rillig - One of the best experts on this subject based on the ideXlab platform.
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Mycorrhizas and Soil Structure
New Phytologist, 2006Co-Authors: Matthias C. Rillig, Daniel L. MummeyAbstract:In addition to their well-recognized roles in plant nutrition and communities, mycorrhizas can influence the key ecosystem process of Soil aggregation. Here we review the contribution of mycorrhizas, mostly focused on arbuscular mycorrhizal fungi (AMF), to Soil Structure at various hierarchical levels: plant community; individual root; and the Soil mycelium. There are a suite of mechanisms by which mycorrhizal fungi can influence Soil aggregation at each of these various scales. By extension of these mechanisms to the question of fungal diversity, it is recognized that different species or communities of fungi can promote Soil aggregation to different degrees. We argue that Soil aggregation should be included in a more complete 'multifunctional' perspective of mycorrhizal ecology, and that in-depth understanding of mycorrhizas/Soil process relationships will require analyses emphasizing feedbacks between Soil Structure and mycorrhizas, rather than a uni-directional approach simply addressing mycorrhizal effects on Soils. We finish the discussion by highlighting new tools, developments and foci that will probably be crucial in further understanding mycorrhizal contributions to Soil Structure.
Vincent Hallaire - One of the best experts on this subject based on the ideXlab platform.
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Indicators of earthworm bioturbation to improve visual assessment of Soil Structure
Soil and Tillage Research, 2017Co-Authors: Denis Piron, Hubert Boizard, Djilali Heddadj, Guénola Pérès, Vincent Hallaire, Daniel CluzeauAbstract:Abstract Earthworm bioturbation, a biological process that strongly influences Soil Structure dynamics, is attracting more interest with the development of no-tillage farming. However, while methods for Visual Soil Structure Assessment (VSSA) are of great use to agronomists working to improve crop management and preserve Soil Structure, few methods have indicators that consider earthworm bioStructures. One reason is that VSSA methods were initially created for conventional tillage systems, where tillage and compaction are the main drivers of Soil Structure over time, while bioturbation is a secondary driver. However, bioturbation is now recognised as an important process for Soil functioning under no-tillage and reduced tillage systems. Among bioStructures, the presence of burrows is one frequently-used indicator, but casts are rarely studied in the field, except in the “Soil-Structure Patterns” method (SSP), which provides a typology of Soil Structure that includes earthworm features. However the SSP typology appears complex (11 patterns), and implementing the method is time consuming. To improve VSSA methods, we identified patterns to define new indicators of earthworm bioturbation. We first assessed whether the patterns identified were useful for highlighting the real impact of bioturbation on the distribution of Soil Structures and the impact of tillage on earthworm activity. We then applied the pattern descriptions to the “profil cultural” method, which provides a detailed assessment of Soil Structure in the Soil profile. This study was performed at two experimental sites in France experiencing different types of Soil impacts (i.e. tillage, compaction). Identifying patterns in Soil morphological units helped us to define four types of bioturbation: (1) type 0: no visible bioturbation; (2) type 1: presence of burrows; (3) type 2: presence of a few fresh cast aggregates; and (4) type 3: high presence of casts in different welded states. This new typology seemed relevant and complementary to typical indicators. When applied to the “profil cultural” method, these bioturbation indicators can improve the assessment of the Soil Structure usually provided by VSSA methods and provide more accurate information to agronomists and farmers about Soil functioning, including biological activities.
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Indicators of earthworm bioturbation to improve visual assessment of Soil Structure
Soil and Tillage Research, 2017Co-Authors: Denis Piron, Hubert Boizard, Djilali Heddadj, Guénola Pérès, Vincent Hallaire, Daniel CluzeauAbstract:Earthworm bioturbation, a biological process that strongly influences Soil Structure dynamics, is attracting more interest with the development of no-tillage farming. However, while methods for Visual Soil Structure Assessment (VSSA) are of great use to agronomists working to improve crop management and preserve Soil Structure, few methods have indicators that consider earthworm bioStructures. One reason is that VSSA methods were initially created for conventional tillage systems, where tillage and compaction are the main drivers of Soil Structure over time, while bioturbation is a secondary driver. However, bioturbation is now recognised as an important process for Soil functioning under no-tillage and reduced tillage systems. Among bioStructures, the presence of burrows is one frequently-used indicator, but casts are rarely studied in the field, except in the "Soil-Structure Patterns" method (SSP), which provides a typology of Soil Structure that includes earthworm features. However the SSP typology appears complex (11 patterns), and implementing the method is time consuming. To improve VSSA methods, we identified patterns to define new indicators of earthworm bioturbation. We first assessed whether the patterns identified were useful for highlighting the real impact of bioturbation on the distribution of Soil Structures and the impact of tillage on earthworm activity. We then applied the pattern descriptions to the "profil cultural" method, which provides a detailed assessment of Soil Structure in the Soil profile. This study was performed at two experimental sites in France experiencing different types of Soil impacts (i.e. tillage, compaction). Identifying patterns in Soil morphological units helped us to define four types of bioturbation: (1) type 0: no visible bioturbation; (2) type 1: presence of burrows; (3) type 2: presence of a few fresh cast aggregates; and (4) type 3: high presence of casts in different welded states. This new typology seemed relevant and complementary to typical indicators. When applied to the "profil cultural" method, these bioturbation indicators can improve the assessment of the Soil Structure usually provided by VSSA methods and provide more accurate information to agronomists and farmers about Soil functioning, including biological activities. (C) 2016 Elsevier B.V. All rights reserved.
