水溶性丙烯酸钾—丙烯酰胺聚合物对土壤水分养分运移的影响
수용성병희산갑—병희선알취합물대토양수분양분운이적영향
Effect of Potassium-polyacrylate-polypropylene-acylamine Copolymer on increasing available nitrogen of soil
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