Resistência do solo à penetração e demanda de tração em haste sulcadora na integração lavoura-pecuária com diferentes pressões de pastejo.

Abstract

An experiment was carried out with crop and cattle rotation in Tupanciretã-RS, on an Oxissoil, aiming to evaluate the power demand of soil cutting shafts, working at different depths on fields with different grazing pressures. The treatments (grazing pressures) were: grazing maintaining 10, 20, 30, or 40 cm of pasture height and (Lolium multiflorum + Qats) adjusting number of animals on the fields. Values of soil resistance to a penetrometer showed increased values as the grazing pressure became higher; these was detected till 0,12 m depth, being higher as the grazing pressures were higher. Power demand by fertilizer shanks was higher on soils under higher pressures. Soil resistance to penetrometer and power demand by fertilizer shanks was closely related