Question

The most quickly available source of nitrogen to the plant is from:

• A. nitrate fertilizers
• B. ammonia fertilizers
• C. amide fertilizers
• D. ammonia nitrate fertilizers

Answer 1

The correct option is A nitrate fertilizers

Nitrogen has to be converted to nitrate, in order to be used by plants. Hence, using nitrate fertilizers directly would be the quickest way to provide nitrogen to the plants. Ammonium nitrate is an important fertilizer with the NPK-rating 34-0-0 (34% nitrogen). It is less concentrated than urea (46-0-0), giving ammonium nitrate a slight transportation disadvantage. Ammonium nitrate's advantage over urea is that it is more stable and does not rapidly lose nitrogen to the atmosphere. During warm weather it is best to apply urea soon before rain is expected or to cover it with soil to minimize nitrogen loss.