Disposição de palhas de trigo por colhedora autopropelida em diferentes velocidades de operação e posições das contra-facas do picador

Abstract

"Straw" refers to crop residues that remain in the soil after harvesting, originating from cover crops and the harvesting process. When managed correctly, it can bring significant benefits to the soil, such as improving its structure and restoring organic matter. This study aims to evaluate the transversal arrangement of wheat straw under two different factors in the harvesting operation. The distribution was evaluated according to the machine's travel speed (2 km.h-1, 4 km.h-1 and 6 km.h-1) and the position of the straw chopper's counter-knives (retracted, intermediate and exposed). It was observed that the adjustment of the harvester's travel speed and the position of the straw chopper's counter-knives influences the distribution of straw on the soil. The intermediate position of the straw chopper counter-knives and the operating speed of 2 km.h-1, when compared to 4 and 6 km.h-1, impairs straw distribution except when the counter-knives are in the intermediate position.