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Boizard, Hubert; Peigné, Joséphine; Sasal, María Carolina; de Fátima Guimarães, Maria; Piron, Denis; Tomis, Vincent; Vian, Jean-François; Cadoux, Stéphane; Ralisch, Ricardo; Tavares Filho, João; Heddadj, Djilali; De Battista, Juan; Duparque, Annie; Franchini, Julio Cezar; Roger-Estrade, Jean
Soil & tillage research, November 2017, 2017-11-00, 2017-11, Letnik: 173Journal Article
•The “profil cultural” method has been adapted to no-till.•The improved “profil cultural” method takes better account of natural processes.•Improvements to the “profil cultural” method allows a more accurate diagnosis in no-till. In France, agronomists have studied the effects of cropping systems on soil structure using a field method that is based on a visual description of the soil structure. This “profil cultural” method was designed as a field diagnostic tool to identify the effects of tillage and compaction on soil structure dynamics. It is of great benefit to agronomists seeking to improve crop management and preserve soil structure and fertility. However, the “profil cultural” method was developed and has mainly been used in conventional tillage systems with regular ploughing. As there has been an increase in the use of various forms of reduced, minimum and no-tillage systems in many parts of the world, it is necessary to re-evaluate this method’s ability to describe and interpret soil structure dynamics in no-till or reduced tillage. In these situations, changes in soil structure over time are mainly driven by compaction and by regeneration through natural agents (climatic conditions, root growth and macrofauna), therefore it is important to evaluate the effects of these natural processes on soil structure dynamics. These concerns have led to adaptations and amendments to the initial method based on field observations and experimental work in different cropping systems, soil types and climatic conditions. The description of crack types has been improved and a criterion of biological activity based on the visual examination of clods has been introduced. To test this modified method, a comparison with the initial method was undertaken and its ability to make diagnoses tested in five experiments in France, Brazil and Argentina. The adapted method allowed an improved assessment of the impact of cropping systems on soil functioning when natural processes were integrated into the description.
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