At present, there are disciplines such as rare earth agriculture, rare earth soil science, rare earth plant physiology, rare earth health toxicology, and rare earth microanalysis. Rare earth elements, as growth and physiological regulators of plants, have three major characteristics for increasing crop yield, improving quality, and enhancing stress resistance; At the same time, rare earths are low toxicity substances that are harmless to humans and animals, and do not pollute the environment; Reasonable use of rare earths can enhance the drought resistance, flood resistance, and lodging resistance of crops.