The increased traffic of larger and more robust agricultural machinery, worsen the soil compaction, affecting directly and indirectly crop productivity. To solve this problem the chiseling has been used; however, this operation has a high demand for traction. In this context, seeking a more efficient operation of chiseling, an implement was developed and evaluated to break simultaneously the soil layers. The experiment was carried out in the municipality of Capão Bonito do Sul , Rio Grande do Sul, in a clayey soil. The general objective was to determine whether there is any significant difference between chiseling in a single layer or in more than one layer while considering the specific resistance as a criterion for three levels of speed. Configurations were tested with chiseling of the soil in one, two and three layers. It was concluded that the chiseling of two layers simultaneously of 15 cm and the longitudinal distance between the tip ends of 30 cm as well as of 40 cm, together with that one performed in layers of 10 cm and advance of 30 cm presented as the most promising.
soil conservation tillage; design of agricultural machinery; soil compaction; chisel plow; traction force
