Physiolgical and Ecological Studies on Barnyard Grass (Echinocloa crus-galli Beauv. var. oryzicola Ohwi) : I. On the primary dormancy of the seed. (1) Relation of the seed covering to dormancy, and effects of temperature and oxygen on breaking dormancy.

Fundamental studies in eradication of barnyard grass (Echinocloa crus-galli Beauv. var. oryzicola Ohwi), an annoying weed in rice cultivation, have been done...