Plantio direto x convencional: exigência de um trator agrícola na semeadura do milho (Zea mays L.) tracionando uma semeadora-adubadora com diferentes pressões de inflação nos pneus.

Abstract

Among the differences among systems of preparation of the soil, the tratory demand is made present as well as different pressures of inflation of the tires of machines and equipments. The present work had for objective to evaluate the acting of a group tractor-seeder during the implantation of the culture of the corn under systems no tillage and conventional planting with different pressures of inflation of the tires of the seeder. The experiment was accomplished in the area of the Laboratório de Maquinas e Mecanização Agrícola (LAMMA), of the Departamento de Engenharia Rural, FCAV/UNESP, Jaboticabal, SP, with design completed randomized in factorial array 2x3, originating 6 treatments with 4 repetitions. The factors were 2 sowing systems (conventional and no tillage) and 3 pressures of inflation of the tire of the seeder (60, 70 and 75 lb.pol-2) they were measured and analyzed the displacement speed, the effective field capacity, the total potency in the bar and the potency for sowing line. Through the obtained results it could be concluded that the displacement speed and the effective field capacity didn't suffer interference of none of the analyzed factors. In the variables total potency in the traction bar and potency for sowing line the direct planting was shown more demanding independent of the pressure of inflation of the tires.