20. Extensively used nitrogenous fertilizer is A.Ammonium nitrate B.Urea C.Ammonium sulphate D.Nitro-lime
Answer: Option B Solution: More than 90% of world production of urea is destined for use as a nitrogen-release fertilizer. Urea has the highest nitrogen content of all solid nitrogenous fertilizers in common use. Therefore, it has the lowest transportation costs per unit of nitrogen nutrient.
