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29 January 2025 Assessing soil mechanical resistance at different depths and compactation mapping at effective root zone
Matheus Cavalheiro Moreira de Camargo, Jeniffer Seitenfus Zanuz, Gabriel Martins Fortes, Mauricio Fornalski Soares, Enrico Fleck Tura, José Eduardo Minussi Winck, Michel Rocha da Silva, Alencar Junior Zanon, Nereu Augusto Streck
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Abstract

Soil compaction, a result of mechanical resistance to penetration, has a direct impact on yield potential by limiting root access to water and nutrients. Factors such as inadequate crop rotation, intensive mechanization, and trampling by animals contribute to compaction. Mitigation strategies include crop rotation, control of machinery traffic, the use of cover crops, and the use of mechanical techniques. Geostatistical methods in pedostatistics evaluate the spatial variability of soil properties. The aim of this study was to determine the penetration resistance in five soil layers (10, 20, 30, 40, and 50 cm), identify critical compaction regions, and quantify the economic impact of compaction management in a 230 ha farm in Alegrete, Brazil. A digital penetrometer was used to measure resistance and semivariograms were calculated using classical and robust estimators for interpolation. The evaluation of the economic impact took into account the variable cost differences between the total area and the area required for compaction. The analysis showed a gradual increase in compaction from the surface to the subsoil, with a highly compacted zone occurring at 20–30 cm, signaling the need for monitoring and intervention. The dependency analysis showed a well-defined structure. The results show that geostatistical tools can be used in the assessment of soil penetration resistance, especially in layers from 10 to 20 cm. An efficient identification and quantification of compacted zones within the cultivation area was achieved. This approach proves to be economically viable, especially in extensive farming, suggesting a wide application in agricultural compaction management.

Matheus Cavalheiro Moreira de Camargo, Jeniffer Seitenfus Zanuz, Gabriel Martins Fortes, Mauricio Fornalski Soares, Enrico Fleck Tura, José Eduardo Minussi Winck, Michel Rocha da Silva, Alencar Junior Zanon, and Nereu Augusto Streck "Assessing soil mechanical resistance at different depths and compactation mapping at effective root zone," Canadian Journal of Soil Science 105(1), 1-8, (29 January 2025). https://doi.org/10.1139/cjss-2024-0005
Received: 31 January 2024; Accepted: 26 September 2024; Published: 29 January 2025
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KEYWORDS
economic impact
pedostatistics
soil decompaction
soil management
soybean
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