1．稀土农用科研阶段的初步划分我国稀土农用的科研和开发工作从1972年开始，经过七年的探索性、分散性研究和试风，第二个七年的多学科联合攻关和大面积示范，于1985年获得了重大技术突破，在稀土农用技术、稀土土壤学、植物生理、稀土毒理卫生学、稀土分析检测及农用产品生产 1. Rare Earth Agricultural Preliminary Research Stage of Agricultural Research Rare Earth Agricultural R & D work in China since 1972, after seven years of exploratory, decentralized research and trial wind, the second seven-year multidisciplinary joint research and large-scale demonstration of the In 1985, a major technological breakthrough was obtained. In the field of rare earth agricultural technology, rare earth soil science, plant physiology, rare earth toxicology and hygiene, rare earth analysis and testing and agricultural product production