COMPARISION OF EMERGENCE OF WHEAT, BARLEY, OAT, AND THEIR ASSOCIATED WEEDS AT DIFFERENT BURIAL DEPTHS.

A pot experiment was carried out to investigate the effects of burial depth on seed emergence of Avena fatua, Phalaris minor, Lolium temulentum, Lathyrus sativus, Lathyrus aphaca and Vicia sativa. Three cereals namely Hordeum vulgare, Triticum aestivum and Avena sativa were also included for comparison. Buried depth was maintained one, two, three, five, ten, fifteen and thirty centimeters in sandy loam soil. None of weed and crop seed emerged at 15 and 30 cm depth while L. temulentum and P. minor failed to emerge at 10 cm sowing depth. Seed burial depth of 3 cm inhibited emergence of P. minor. The emergence of L. temulentum was lowered at only 1 cm depth. Three cereal crop seeds took less number of days to initiate and complete seedling emergence as compared to weed seeds at 1, 2 and 3 cm depth, while in weed species three broad leaved weeds i.e. L. sativus, L. aphaca and V. sativa took longer time to complete seedling emergence. Vicia sativa showed 10c% emergence at 5 and 10 cm depth. Vicia sativa started emergence earlier and took maximum (68) number of days to complete emergence than all other weed species tested. [ABSTRACT FROM AUTHOR]