Desempenho de um mecanismo dosador de sementes mecânico sob quatro velocidades e condições de cobertura.

Abstract

The objective of this work was to evaluate the performance of seeder offered commercially for no-tillage. The rehearsals were accomplished at the Cazarotto Small Farm, municipal district of Maringá-PR in HAPLOTOX Soil, using a seeder with distribution mechanism of the type horizontal plate. It was used design in split-splot with 4 replications. The main treatments were covering conditions of the soil (spontaneous vegetation, oat black desiccated and oat black desiccated + rolled) and the secondary ones the forward speeds (horizontal plate: 4.7; 5.4; 6.5 and 7.2 km h-1). It was studied the regularity of longitudinal distribution. The increase of the speed reduced the percentage of acceptable spacings and increased the percentage of defective spacings as well as the variation coefficient.