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Solid Earth An interactive open-access journal of the European Geosciences Union
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Volume 6, issue 1
Solid Earth, 6, 361-371, 2015
https://doi.org/10.5194/se-6-361-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Solid Earth, 6, 361-371, 2015
https://doi.org/10.5194/se-6-361-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 27 Mar 2015

Research article | 27 Mar 2015

Soil physical quality changes under different management systems after 10 years in the Argentine humid pampa

J. L. Costa1, V. Aparicio1, and A. Cerdà2 J. L. Costa et al.
  • 1EEA INTA Balcarce, C. C. 276, 7620 Balcarce, Buenos Aires Province, Argentina
  • 2Soil Erosion and Degradation Research Group, Departament de Geografia, Universitat de València, Blasco Ibáñez, 28, 46010-València, Spain

Abstract. South American countries with the highest surface of land under no-tillage (NT) management are Brazil, Argentina and Chile. In Argentina, 78.5% of the agricultural land is cropped under NT management. Several experiments have confirmed the improvements in soil aggregation and infiltration achieved by NT management in dry-land farming areas associated with increases of bulk density (δb) under NT management. An increase in bulk density implies a reduction of the macro and mesoporosity that is in contradiction with the increased infiltration that occurs at macro and mesopores. We hypothesize that the increase of bulk density in NT management mainly affects the mesopores. We evaluated the evolution of the soil physical parameters in three management systems in four farmers' fields. We found that the reduction in total porosity under NT management is mainly a product of a reduction in the percentage of mesopores in the soil. In this work, the results indicate a modification of some soil physical parameters (porosity, near-saturated hydraulic conductivity, soil structure) due to uninterrupted agricultural production, but the management system did not affect the yields of crop.

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Several experiments have confirmed the improvements in soil aggregation and infiltration achieved by no-tillage (NT) management associated with increases of bulk density. An increase in bulk density implies a reduction of the porosity that is in contradiction with the increased infiltration that occurs in macro and mesopores. We found that the reduction in total porosity under NT is mainly a product of a reduction of the mesopores. The results indicate NT did not affect the crop yields.
Several experiments have confirmed the improvements in soil aggregation and infiltration...
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