EVALUATION OF A PRECISION SEED PLANTER

A Magnum 2800 seeder manufactured by Jumil was examined in laboratory on its commercial form and with modifications on its seed conductor tu be. Three seed-drop heights (400, 300 e 200 mm), two seed delivery pos ition (longitudinal and lateral) and two tube shapes (straight and cur ve) were considered. Each of these combinations was evaluated at three different forward speeds (5.0; 7.0 and 9.3 km/h) with a fixed deliver y rate of eight corn seeds per meter. There was practically no differe nce between the performance of the seeder with modifications and that of the commercial form (seed-drop height of 400 mm, longitudinal deliv ery and straight tube). In any combination, higher increase in the for ward speed reduced the performance of the seeder tested.