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)

The efficiency of urea can be increased by using neem cake.
Nitrification inhibitors like neem cake when applied along with urea reduce losses of applied nitrogen, thereby resulting in an improved yield of crops.
The efficiency of the nutrient may be improved by combining the use of organic neem cake with the inorganic source of nitrogen fertilizer namely urea.