INFLUENCE OF PLANTING FURROWS OPENERS ON AGGREGATES GEOMETRIC MEAN DIAMETER AND SURFACE ROUGHNESS AFTER SOIL TILLAGE BY CHIESELLING
Keywords:
soil, surface roughness, planting, furrow, clod, soil tillage.Abstract
A high surface roughness and appropriate Geometric Means Diameter (GMD) of soil clods are a desirable surface property to control soil erosion. However, the effect of seeding operation over these properties are not much known. In a Podzolico Vermelho-Amarelo soil, the effect of three planting furrow openers (modified double disk, double disk, chisel) on the surface roughness and the GMD of the clods was evaluated. Surface roughness and GMD were induced by chiselling operation in the presence of three amount of vegetal residues of vetch and oat. GMD of clods induced by scarifier was not affected by planting furrow openers. Surface roughness that remains from chiselling operation was affected by chisel furrow.
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