Document Type : Original Article
Author
Ph.D. Assistant Professor
Abstract
In this research, the pneumatic planter made in karaj Tarashkade company and the driller made in Dezful sanatkaran company, was Compared and evaluated. The independent variables includes, the type of planter in two levels (row crop planter and driller), two types of seed bed (smooth bed and plowed land), three ground speed (3, 5 and 7 km/h), 4 seed type (tomato, onion, radish and lettuce). the dependent variables includes the seed’s lateral dispersion coefficient compared to the straight line, the seeds breakage percentage and the effect percentage metering devise on seed viability and, the rate of seed shedding per hectare. In this test, a statistical software program MSTATC and split plot based on randomized complete block design with three replications was used. The results showed that: The optimal values for the rate of seeding per hectare Index is obtained (0.07 kg), seed’s lateral dispersion coefficient in the straight line is obtained (2.5 mm), percentage of seeds breakage and effect of the metering device on viability after passing the metering device is obtained (0%). Therefore with respect to the seed’s lateral dispersion coefficient compared to the straight line and the rate of seed shedding per hectare index, row crop planter is better than driller. With respect to the seeds breakage percentage index due to the mismatch of the cell's seed planters, row crop planter had more breakage than driller. With respect to the effect percentage metering devise on seed viability index, Were not significantly different between the two planters.
Keywords
)