fertilizing nitrogen rate
Nitrogen rate
氮肥用量
氮用量
氮肥水平
氮素形态
氮素水平
施氮量
施用量
施氮水平
氮肥
地力水平
rate nitrogen fertilization
sediment accumulation rate rate
the optimal fertilization of nitrogen rate
Endogenous nitrogen losses
Soil and nitrogen losses
A Savings Deposit Rate of Interest Rate of Taxation Consumption
afforestation survival rate and retention rate
build rate =building rate
Estrous rate and conception rate
proliferation rate multiplication rate
rate expansibility rate
Standardization of rate and deposition of rate difference
The recurrence rate and the cure rate
combined application of organic nitrogen and nitrogen