Studies on the wild Japanese barnyard willet as a weed on the lowland rice field. : I. The scope of the studies and the experimental methods used throughout these investigations.

Abstract

The author presents here only the preliminary account of a series of the studies, which have been carried out on the Japanese barnyard millet, a weed on the lowland rice field, and in near future the results obtained will be made public in some detail. Wild Japanese barnyard millet (Echinochloa crus-galli) is one of the most common and noxious weeds occurring on the paddy rice field in Japan, and thus the author duly considers that the results of these investigations, revealing various specific characteristics of the plant as the weed on rice field, would have no less important bearing on the practical problems of rice culture in Japan, though they are rather of basic interest in the main. Investigation were usuahy carried through on the transplanted plants grown in the Wagner's pot, but in some occasions the direct seedage method was also applied.