Depths of sowing of the corn and applied loads in the press whell of seeder

Abstract

The influence of factors related to the sowing can produce changes in the behavior of the crops, such as corn. In this context, the objective of the present work was to evaluate the soil properties and the height of the corn as a function of the sowing depth and of the loads imposed in the press wheel. The experiment was carried out in FCAV - UNESP of Jaboticabal (SP) in the Testing Track of the Laboratório de Máquinas e Mecanização Agrícola (LAMMA) of the DER. The used design was a completely randomized design in the factorial scheme of 4 x 3, being four vertical loads (62.7; 160.7; 258.7 and 356.7 N) and  three sowing depths (3; 5 and 7 cm) with three repetitions. The analyzed parameters were: soil deformation, mobilized area, depth of final sowing and plant height. The results highlight that the increase of the applied vertical loads on the soil in the sowing produced deformation in the soil, with high determination coefficient. The sowing depth affected the mobilized area. The depth of 5 cm affected the final height of plants, being found at this depth the highest crop height.