The mechanization plays a major role in agricultural production and consequently at its costs. The correct management of mechanized systems contributes to its optimization and decreases its costs, making the final product better. The aim of this research was to study and characterize the spatial variability of soil mechanical resistance to penetration, energetic demand and operational performance of a tractor-seeder-fertilizer system at peanut sowing operation, working with 5% distilled ethylic peanut biodiesel, in conventional tillage system. Were evaluated the required drawbar force and power, effective field capacity, fuel and energy consumption, slippage and the soil mechanical resistance to penetration. By the results, were concluded that the spatial variability of the variables related to mechanized system depends on displacement direction; the soil mechanical resistance did not demonstrate correlation with the other variables. The specific fuel consumption showed negative correlation with the drawbar force, indicating better use of fuel energy available for greater traction demand.
fuel consumption; geoestatistic; operational performance; penetrographer
