Qualidade na distribuição longitudinal de sementes por semadora de precisão

Abstract

Sowing is an essential agricultural operation for the proper establishment of crops, directly influencing plant stand and productivity. This study evaluated the longitudinal distribution of corn seeds using a mechanical precision planter operating at two speeds (4 km.h⁻¹ and 7 km.h⁻¹), also considering the slip indices of the planter and the tractor. The experiment was conducted at the Experimental Farm of the State University of Maranhão. Parameters such as seed spacing, seeding depth, plant spacing, and slippage were evaluated. The results showed that the lower speed provided better uniformity in seed placement, fewer skips and doubles, and a lower slip index. The planter slip ranged from 11% to 14%, while the tractor slip remained at 10%. Operating speed significantly influenced the quality of sowing, with lower speeds recommended for better performance. Slip control and proper equipment adjustment are essential for successful sowing and increased operational efficiency