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生活中肥料的来源是很多的,现就氮、磷、钾肥的制作简述于下。氮肥:将一般食用的大豆、花生、瓜子、蓖麻籽
Sources of fertilizers in life are many, now on the production of nitrogen, phosphorus and potassium fertilizer outlined below. Nitrogen: The general consumption of soybeans, peanuts, melon seeds, castor beans