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:: AGGREGATION OF AN OXISOL UNDER MANAGEMENT SYSTEMS FOR 14 YEARS IN THE MIDWEST OF BRAZIL
Júlio Cesar Salton, Alex Ramos Costa, Josileia Acordi Zanata
Abstract T he adoption of a production system after long time results in changes in soil properties that can influence the soil quality and the productivity of crops. In order to evaluate the effect of soil management systems including crop-livestock was evaluated the soil aggregation in a long-term experiment located in Dourados,MS in the Midwest region of Brazil. Four management systems were implemented and conducted since 1995 in a clayey Oxisol with soybean cultivation in conventional tillage and no-tillage, permanent pasture and soybean in rotation with pasture on no-tillage. The largest average aggregate size was found in systems with the greatest time with the presence of grazing. This trend was also found to separate the aggregate size classes and these systems with the presence of as much pasture was observed in the class greater than 2 mm. The largest amount of aggregates class lower than 0.25 mm was found in the conventional system. more
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