Sowing Units for Drilling Vegetable Crops

Sowing units for small-seeded crops have not been studied enough and the domestic seeding machines commercially produced do not meet the agrotechnical requirements. To increase the drilling quality of small-seeded crops in small rates is possible by improving the design and technological schemes of mechanical sowing units. The constructive technological schemes of the BBA and VPS sowing units for drilling vegetable crops are substantiated in the article. Their design, principle of operation and basic adjustments are described. The assortment of hand, motor block and tractor seeders for sowing vegetable crops with the BBA and VPS sowing units is given. Sowing units, developed by SPC “ROSTA”, are applied in seeders for row planting, single-seed planting and band twin-row planting of a wide range of vegetable crops both on a flat surface and on a bed. In the ROSTA trading centres, there are special points where it is possible to select sowing units and to test them on special stands for the rate and uniformity of seeding.