随着水改旱耕作制度的推进,日本大豆栽培面积不断增加,而宫城县因受大豆花叶病毒影响,大豆产量下降,同时品质也不好。 With the promotion of dry farming system promoted by water, the area of ​​cultivation of soybean in Japan has been continuously increasing. However, due to the influence of soybean mosaic virus in Miyagi Prefecture, the soybean yield has been reduced and the quality has not been good.