EVALUATION OF SOIL STRUCTURAL STATUS IN AGRO-PASTORAL SYSTEMS
DOI:
https://doi.org/10.64132/cds.v43i1.896Keywords:
cultural profile, compaction, porosityAbstract
Soil structural status in various agricultural and agro-pastoral systems was evaluated using the Cultural Profile methodology. Anthropogenic-origin structures related to soil use and management and biological activity within the profile were considered. The evaluation encompassed the proportion of these structures, their main characteristics, and the origin of macropores generated by roots and fauna. Additionally, shear strength for each structure, bulk density, and both structural and textural porosities were measured. The results showed significant differences between systems with pastures and those under continuous cropping. In the former, macroporosity was primarily attributed to biological activity, while in continuous cropping systems it was more related to physical processes of expansion and contraction. The most cohesive and least porous structures were present across all treatments, likely associated with machinery traffic. Pasture systems showed greater biological porosity generation in soils with highly cohesive structures, characterized by rounded pores and galleries with excrement, whereas in continuous agricultural soils, an incipient laminar structure emerged. Shear strength showed significant variation between structures, indicating high dependence on soil moisture content. Finally, the root system was more developed in soils under pasture systems, contrasting with greater bulk density in under continuous cropping.
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