Semeadura direta de milho com dois tipos de sulcadores de adubo, em nível e no sentido do declive do terreno

this study aimed to evaluate the operational parameters of a series of mechanized tractor and seed drill, and corn yield planted in different settings and combinations of machines with the production environment. treatments consisted of types of fertilizer furrow (double discs and shanks), which were tested in experiments in which the operation of corn direct seeding was performed across the slope (in level) and direction of slope (for and against). sowing against the slope and the use of shank implied a higher demand of traction effort, skating the tractor and fuel consumption per area worked, and didn't affect the volume of soil mobilized, population of plants and grain yield of corn in relation to the operation for the use of slope and furrow discs doubles, respectively. the use of furrow shank type t resulted in fewer plants broken and lodged plants in relation to the use of double discs, regardless of the direction of operation. the main practical difference between level sow or direction of the slope is the formation of grooves oriented in the same direction, by the action of furrow shank and the high shaft of the tractor wheel slip since the fuel consumption per area worked and operation capacity were not affected by those variables.