Aiming to evaluate the response of corn to different soil tillage systems and seeding methods under no tillage, a field trial was conducted at the Faculdade de Agronomia da Universidade de Passo Fundo, RS, in 1993-94. Four treatments (no tillage system; disk plow + disking; chisel plow + disking and prototype chisel plow) and two seeding types (hoe type planter and offset double disk) were used. Grain yield of com and soil density were evaluated after corn harvesting. Corn yield was significantly affected by hoe type planter, mainly for the no till treatment. The soil density results showed more compaction on the surface layers on the no tillage treatment, howewer no difference among treatments was observed for deeper soil layers. It was concluded that narrow knife used on the planter eliminates soil compaction problems, proportioning better rooting of plante.
no tillage; seedings type; soil compaction
