SOIL MOBILIZATION IN THREE TILLAGE SYSTEMS

Abstract

The action of implements and machines used for the soil prepare can cause losses of great magnitude due to lack or excess layers of treatment. In this study it was determined the rates of mobilization for three tillage systems of soil ferriferous-yellow, subjected to no-tillage during the last five years with crops of corn and beans. The evaluated systems were the conventional, the conservationists subsurface tillage and no-tillage. It was used a tractor wheels (model mf 265), a disk plow, a harrowing, a ripper, a seeder-fertilizer and a profilometer of 2 m. It was raised the natural profiles, internal and finals on the ground. Then, it was determined the mobilized area index, elevation area and blistering, applying simpson’s method to calculate the cross sections. It was used an experimental design in randomized blocks with 4 replications. It was observed significant differences between the indices studied, the conventional system featuring the highest values. The no-tillage system showed the lowest values for the areas of elevation and mobilized, however, the blistering was intermediate. It was concluded that the system of preparation influences the rates of mobilization and that there was a different trend for each system.