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Studies on the successive cultivation of Italian ryegrass and barnyard grass on a paddy field converted to upland conditions. 3. The effect of some environmental conditions on the seed viability of barnyardgrass


, : Studies on the successive cultivation of Italian ryegrass and barnyard grass on a paddy field converted to upland conditions. 3. The effect of some environmental conditions on the seed viability of barnyardgrass. Journal of Japanese Society of Grassland Science 20(2): 73-78

Periodical changes of viability of barnyardgrass (Echinochloa crus-galli var. caudata) seed were investigated using air-dried seeds stored at 3 different temperatures and seeds kept in soil. Seeds maturing in autumn were dormant but there was no secondary dormancy. In air-dried seeds, the dormancy period ranged from 3 to 7 months for indoor storage (10-20 deg C in winter), from 6 to 11 months outdoors (-2.1 to 30.7 deg ) and from 1 to 2 years for low-temperature storage (5 deg ).

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