Topdressing of nitrogen

• 追氮

Topdressing of nitrogen的用法和样例：

例句

1. Topdressing nitrogen treatment had no obvious effect to total nitrogen in soil, but it had a stronger effect to alkalined-nitrogen.
   追氮处理对土壤全氮没有明显的影响，但对土壤大麦碱解氮的影响比较大。