Studies on the distribution of summer weed in the Tochigi-Ken. (I)

[摘要] Summer weeds in the field of Tochigi-Ken (districts) were generally surveied in 1949. In this districts we found that summer weeds had 106 kinds. The results of servey are summarized as follows ; [table] Digitaria ciliaris PERS. maybe from this table assumed absolutely predominant in this districts in summer season.

[学科分类] 农业科学（综合）