The test results showed that with absorbent added into potassium fertilizer, the releasing velocity of potassium ions was slower than ordinary fertilizer.
室内实验证明，添加吸附材料可使改型钾肥释放钾离子的速度明显慢于普通三元复合肥。
Determination on humic acid for compound fertilizer by potassium bichromate titrimetric method, it is convenient to application and popularity, test results are satisfaction.
采用重铬酸钾容量法测定复混肥料中腐植酸含量，试验结果满意，便于推广应用。
The principle and process of producing potassium-nitrogen compound fertilizer and aluminium hydroxide from potash alum are studied. Some problems are solved through the pilot test.
利用四川某含钾岩石制得的钾明矾进一步制备硫酸型钾氮肥和氢氧化铝，从原理、工艺等方面进行探讨，并通过中试解决了工业化生产所出现的问题。
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