Performance Comparison of precision Pneumatic Planter and Grain Driller Common in Mechanized Rapeseed Sowing

In order to evaluation of two types of planter for mechanized rapeseed sowing, an experiment was conducted in Agriculture Faculty of Islamic Azad University, Shoushtar Branch. A strip plot in the form of randomized complete blocks design was applied with three replications. Main Plots were including planter types: a1; precision pneumatic Planter (mod. V5 Gaspardo - Italy), a2; grain driller (made by Barzegar Hamedan). Subplots were two levels of forward speed including: b1; 4 Km/hr and b2; 6 Km/hr. Rate of damaged seed in seed metering device, uniformity of planting depth, uniformity of seed distance on row, seed emergence were measured for each machine. The results showed that there is a significant difference between the two planter in the four parameters studied in this design at the level of 5% probability. Precision pneumatic Planter mod. V5 Gaspardo with the lowest rate of seed damage about 3.83% and uniformity of planting depth, uniformity of seed distance on row and seed emergence rate index with 89.76, 85.3 and 87.8% respectively had better performance compared to the grain driller made by Barzegar Hamedan with 4.2% damaged seed rate and uniformity of planting depth, uniformity of seed distance on row and seed emergence rate index with 78.36, 46 and 63.6% respectively. Increasing the forward speed rate had no significant effect on the rate of damaged seed, uniformity of planting depth, uniformity of seed distance on row, but seed emergence significantly decreased with increasing forward speed in the grain driller made by Barzegar Hamedan.