稀土是元素周期表中镧系17种元素的统称。我国从1972年开始稀土农用研究工作,1980年开始大面积示范。1984年全国农用稀土推广面积已达500多万亩。其中黑龙江、河南省国营农场在小麦、大豆、玉米等作物上推广350多万亩,取得了显著的增产和经济效益。 Rare earth is the general term for the 17 elements of the lanthanide series in the periodic table. Since 1972, China began Rare Earth Research in Agriculture, and large-scale demonstration started in 1980. In 1984 the national agricultural rare earth promotion area has reached more than 500 million mu. Among them, the state-owned farms in Heilongjiang and Henan Province have popularized more than 3.5 million mu of crops such as wheat, soybean and corn, and have achieved remarkable yield increases and economic benefits.