compound nitrogen fertilizer synergist 复合氮肥增效剂
compound nitrogen fertilizer synergists 复合氮肥增效剂
4 compound nitrogen fertilizer synergists 复合氮肥增效剂
Highly available compound nitrogen fertilizer 高效复合氮肥
nitrogen phosphorus potassium compound fertilizer 氮磷钾三元复混肥
iron nitrogen compound fertilizer 铁氮复合肥 ; 铁
high-nitrogen compound fertilizer 高氮复合肥
A field experiment was conducted to study the effects of 4 compound nitrogen fertilizer synergists on the growth and yield of maize and urea-N utilization by it.
在大田小区试验条件下，研究了复合氮肥增效剂对玉米生长、产量和尿素氮利用的影响。
Reduced products were analyzed by GC to determine of nitrogen-fixation activity in biologically compound fertilizer.
采用气相色谱测定还原产物，以确定复合菌肥料的固氮活性。
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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