Leaf fertilizer was applied on peppermint plant to study the effect of leaf fertilizer on the growth, yield and economic benefit of peppermint.
主要对叶面肥在椒样薄荷上施用进行对比试验，以探讨对椒样薄荷的生长、产量及经济效益的影响。
Soil nutrients systematic evaluation method was adopted to study soil nutrients and effect of potassium on economic character of seed of melon and seed-melon, yield and benefit of seed-melon.
试验采用土壤养分状况系统研究法，根据土壤养分状况研究钾对籽瓜与瓜籽的经济性状、瓜籽产量及效益的影响。
This procedure is of high yield and simple operation and benefit to enhance teaching effect.
改进的方法制备收率高，反应操作简单，更有利于实验教学。
The results show that yield increase effect and economic benefit of controlled release N fertilizer application decrease in lower, medium and higher fertility paddy soils in proper order.
结果表明：在较低、中等和较高肥力稻田上，施用控释氮肥的增产效果和经济效益依次递减；
The results show that yield increase effect and economic benefit of controlled release N fertilizer application decrease in lower, medium and higher fertility paddy soils in proper order.
结果表明：在较低、中等和较高肥力稻田上，施用控释氮肥的增产效果和经济效益依次递减；
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