| 摘要 |
PROBLEM TO BE SOLVED: To provide a coated fertilizer which contains trace materials, is small in the variation in the content ratio of the trace materials among particles and the variation in the elution of the fertilizer and the trace materials and facilitates the control of the elution. SOLUTION: The surface of the fertilizer is coated with a first coating layer containing the trace materials and a second coating layer having a function to control the elution. COPYRIGHT: (C)2003,JPO
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