LABORATORY SCALE OF SEED DAMAGE OF COARSE-GRAIN DEPENDING ON GROOVE DIAMETER AND DEPTH IN ROLLER DEVICES

Grooved roller planters can be used in the planting of small and large seeds when they are produced in the appropriate groove diameter and groove depth depending on the seed dimensions. In this study, the rate of damage to the dry bean seeds of the grooved roller device, which was modified and placed on the bottom of the warehouse of a grain planter, was investigated. Nine grooved rollers manufactured in different groove diameters (18, 20, and 22 mm) and groove depths (5, 8, and 11 mm) were tested at 80, 120, and 160 kg ha(-1) seed rates and 8, 13, and 18 min(-1) feed shaft rotation speeds. Breakage, crushing, and cracking in dry bean seeds were considered as damaged seeds. According to the results, the increase in the seed rate, feed shaft rotation speed, and groove depth reduced the seed damage rate. The increase in groove diameter increased the rate of seed damage. The lowest seed damage rate values were obtained at 160 kg ha(-1) seed rate, 2 m s(-1) forward speed, 18 mm groove diameter, and 11 mm groove depth.