I know when the word fertilizer is mentioned, we usually refer to NPKfertilizers.
我知道，说到肥料，我们通常指的是氮磷钾。
2
In addition, the structure of ammoniator-granulator, and the operation condition for MAP, DAP and NPKfertilizers are explained.
同时阐述了转鼓氨化造粒机的构造以及用于生产MAP、DAP和NPK复合肥的条件。
3
Results showed that long term application of NPKfertilizers or manure could increase soil biomass-N, especially the effect of manure on biomass-N was obvious.