nitrification in soil

例句：

1. 1. Nitrification is the process of converting ammonia into nitrate in soil.
   硝化作用是土壤中将氨转化为硝酸的过程。
2. 2. The process of nitrification is essential for maintaining soil health.
   硝化作用过程对于保持土壤健康至关重要。
3. 3.In anaerobic conditions, denitrification occurs instead of nitrification.
   在无氧条件下，发生反硝化而不是硝化作用。