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看外观。除氨水和液氨外 ,其余均为固体结晶或颗粒状 ,氮化肥中 ,除石灰氮是黑色外 ,其它品种一般为白色。磷化肥中 ,普遍为灰色或深灰色 ,钾化肥中 ,一般为白色。闻气味。氮肥除氨水、液氨、碳酸氢铵等特殊的氨臭味 ,石灰氮有类似电石气味之外 ,其它化肥品种一般无特殊气味。?
Look at the appearance. In addition to ammonia and liquid ammonia, the rest are solid crystalline or granular nitrogen fertilizer, except lime nitrogen is black, the other species is generally white. Phosphorus fertilizer, generally gray or dark gray, potassium fertilizer, usually white. Smell the smell. Nitrogen ammonia, ammonia, ammonium bicarbonate and other special ammonia smell, lime nitrogen has a similar calcium carbide odor, other types of fertilizer generally no special odor. ?