A Study on Preparation of Potassic Fertilizer and Silica powders from Yeying Illite Ores
叶营伊利石矿制取钾肥及硅粉的试验研究
As for intelligent use of fertilizer, the potassic fertilizer is a choke point in China.
就合理使用肥料来讲，钾肥已成为我国农业发展的瓶颈。
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