Seed materials collected from a crop contain grains of different grades. Grains situated at the top and middle portion of an earhead are always somewhat bigger and better filled than the rest. It is believed that plump, well-developed and heavy seeds give rise to thick and heavy seedlings that grow uniformly, establish quickly after transplanting and result in better crop than ill-developed, half-filled and shrivelled ones. Experiments conducted in Japan indicate that seeds of higher specific gravity germinate better, give rise to healthy seedlings and influence the yield considerably (Matsubayashi 1967).
Submitted by yogesh on Tue, 02/12/2008 - 10:18