什么是稀土？稀土是历史遗留下来的名称。从１８世纪末才开始被人们发现。当时的化学家常常把不溶于水的金属氧化物都称为“土”。稀土元素是元素周期表中钪、钇和１５种镧系元素的总称。稀土在农业上的应用，曾是我国独具特色的项目。那硕大红润的苹果，晶莹剔透的葡萄，... What is rare earth? Rare earth is the name left over from history. From the late 18th century, people began to be discovered. Chemists at the time often referred to water-insoluble metal oxides as “earth.” Rare earth elements are the general term for scandium, yttrium and 15 lanthanides in the periodic table. The application of rare earth in agriculture was once a unique project in our country. That huge red apple, crystal clear grape, ...