Abstract
Abstract. The crop producers who cannot buy a second planter due to its cost, have been seeking to take advantage of the planter with the roller-type metering device in dry bean sowing. While seemingly adequate for dry bean sowing, if the roller structural properties and operating parameters suitable for the seed dimensions are not used, it can cause an increase in the seed damage ratio. In this text, a mission was undertaken to determine the damaged seed ratio caused by the roller-type metering device under the influence of the flute diameter and helical angle, ground speed, and seeding rate. Seed damage was measured by collecting and weighing seed from each replication during seed flow. Flute diameter (18, 20, and 22 mm), helical angle (0, 10, and 20o), ground speed (1.0, 1.5, and 2.0 m s-1), and seeding rate (100, 150, and 200 kg ha-1) independent variables and seed damage rate were selected as the dependent variable, to measure seed damage level. According to the results, the ground speed definitely affects the seed damage rate, while the helical angle and flute diameter quite affected. The increase in the seeding rate, ground speed, helical angle, and flute diameter reduced the seed damage rate. The lowest seed damage rate values were obtained at 200 kg ha-1 seed rate, 2 m s-1 forward speed, 22 mm groove diameter, and 20o helical angle.
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