Concept:Urea is the most widely used nitrogenous fertilizer because it has the highest nitrogen content among solid fertilizers, making it cost-effective for transport and application.
Explanation:Nitrogen is essential for plant growth, especially for green leaves.
Urea (chemical formula
CO(NH2​)2​) contains about 46% nitrogen, which is higher than ammonium nitrate, ammonium sulphate, or nitro-lime.
Its high nitrogen content means less fertilizer is needed per unit of nitrogen, reducing transportation and storage costs.
More than 90% of urea produced globally is used as a nitrogen-release fertilizer.
This makes urea the extensively used nitrogenous fertilizer in agriculture.
Answer:B. Urea