In the soybean seeding (Glycine max (L.) Merrill) process, the commonly used seed drill is assembled with the perforated horizontal plate type seed metering mechanism. To accomplish an efficient seeding process, using metering device parameters such as speed and seed homogeneity should be considered. The objective of this research was to study the influence of the soybean seed dimensional variables on quality of seed drill. For the purpose, a precision seed drill with four horizontal dosing plates and three soybean cultivars were used along with five speeds. The dependent variables were percentage of disc cells filling and percentage of the physical damage to seed. The best subsets method, is Minitab software, which adjusted well to experimental data. It was concluded that speed; seed size, coefficient of variation and the difference between seed size (length and width) and plate cells influenced the disc cell filling.
Glycine max; soybean seeds; planters; horizontal plates
