seeds of many improved varieties are available on the market and are sown at a rate of approximately 120 seeds per m and at a depth of 5-15mm. seed maturation is uniform and the 1000 seed weight varies between 6.0 and 7.5g. management procedures from sowing to harvesting can be conducted largely with the same machinery used for common cereals. yield levels vary widely between 1100-1600kgha in russia, 450-2500kgha in the u.s. and 600-2400kgha in germany.