Análise econômica da operação de preparo de solo para a cultura do arroz usando dois conjuntos trator – grade

Abstract

With the intensification of agricultural mechanization and the constant evolution of machines and technologies, which demand high investments, the present study brings the analysis of the relationship between operational cost and field capacity, considering the comparison of costs per unit of area and yield, aiming at the reduction of total investments and, consequently, the best cost-benefit for the farmer. To this end, two agricultural mechanical sets of different sizes, formed by 210 hp and 80 hp 4x2 AFT tractors, were used in the study, performing the harrowing operation in conventional tillage to incorporate organic matter, soil correctives and fertilizers. The field's tabled, commercial and agronomic data revealed relevant notes regarding field capacity and hourly costs. When comparing the two sets, the set of lower power presents hourly costs 2.8 times lower, but the set of higher power brings a save of 8% in the cost per unit of area.