Efficiency of urea can be increased by

A. Deep ploughing

B. Using neem cake

C. Early harvesting

D. Both B and D

Answer: Option B

Solution(By Examveda Team)

Urea is an organic compound and more than 90% of world industrial production of urea is destined for use as a nitrogen-release fertilizer. Urea breaks down in the soil to give ammonium.
The efficiency of urea can be increased by using neem cake with it, as it reduces the rate of nitrification thus efficiency is increased.