Chinese : 相关分析表明，在褐潮土上增施磷肥和有机肥对提高玉米产量具有重要的作用。 English : The phosphorus fertilizer and farmyard manure had the best effects on maize yield in Drab Fluvo-aquic soil.
Chinese : 污水处理厂氮磷的处理和回收已经成为必然。 English : It has become necessary to treat and recover nitrogen and phosphorus for sewage treatment plants.
Chinese : 氮磷是富含营养物质的两大天然肥料，正为这些树所需（其他树种也同样需要）。 English : Nitrogen and phosphorus are two natural fertilizers-nutrients-that these ( and other plants) need.