I know when the word fertilizer is mentioned, we usually refer to NPK fertilizers.
我知道，说到肥料，我们通常指的是氮磷钾。
2
The analysis to pollution criterion of NPKfertilizer plant shows that the current standards cannot cover all the limitation of pollutant discharges.
对NPK复合肥工厂污染物排放标准的分析表明：现行的有关标准不能涵盖其污染物排放的限制。
3
An experiment was carried out to study the effect of NPKfertilizer, micro-element fertilizer, organic fertilizer application on the yield and nutrient quality of Alfalfa Medicago sativa l.