Combined application of N and K  氮钾配施

Effect of N and K on yield  增产效应

Combined N and K and Zn fertilizers  氮、钾、锌肥配施

section n-n n-n  剖面

section k-k k-k  剖面

balance between K + and N a +  K~+、Na~+平衡

balance of K fertilizer  钾素平衡

balance of N  氮素平衡

Balance of N fertilizer  氮肥平衡

check and balance of powers  权力制衡原则

disequilibrium of balance of payment  国际收支不平衡

dynamic and balance of salt  盐分动态及平衡

gambling and balance of labor benefit  劳资利益的博弈与平衡

inflow and outflow of balance of payments  国际收支差额的变动

loss of balance of psychology  心理失衡

N Balance and cycling  氮素平衡与循环

protection based on the principle of balance of energy  能量平衡保护

reduction of balance of cost method  降低成本余额法

“K-of-N” system  k/N(G)系统