五十年代初,国外■重视和研究膨润土在农业上的应用.日本研究应用膨润土最早.这里只介绍日本研究和应用膨润土的情况.膨润土主要用于土壤改良、农肥和农药等方面.日本在大量改土时期,膨润土的用量很大;随着农业科学的不断发展,膨润土在农肥、农药中的用量又日益增多,现用量已达膨润土总产量的20%以上. The early 1950s, foreign ■ attention and study of agricultural applications of bentonite in Japan, the earliest application of bentonite. Here only describes the situation in Japan and the application of bentonite bentonite is mainly used for soil improvement, fertilizers and pesticides, etc. Japan in large quantities With the continuous development of agricultural science, the dosage of bentonite in agricultural fertilizer and pesticide is increasing day by day, and the present usage amount has reached more than 20% of the total output of bentonite.