The mechanical harvest is an important tool in the productive process of grain crops. For the soybean crop, if not used appropriately, it can result in severe mechanical damages to the seed, caring out significant damages to the crop, especially on seed quality. In order to evaluate the damages caused by mechanical soybean harvesting, the purpose of the present research was to study the effect of the system of axial trail on the bands percentage, the amount of MOG (other material different from the grain) and broken seeds of soybean (cv. M-soy 8001), in function of the speed of work and rotation of the threshing cylinder. The experimental design was completely randomized in split plot, being evaluated two threshing cylinder rotations (400 and 500 rpm), three operation speeds (3.5; 4.5 and 5.5 km h-1) with three replications. The results obtained showed that the combination of speed operations and rotation of threshing cylinder evaluated, did not affect the seed vigor, impurity, bands, sand emergence and germination speed index and that increasing the rotation of the 400 to 500 rpm broken seeds were bigger.
harvesting losses; vigor; quality
