Why does the Government of India promote the use of 'Neem-coated Urea' in agriculture?

1. The Government of India promotes the use of 'Neem-coated Urea' primarily because the Neem coating serves as a nitrification inhibitor. 2. When regular urea is applied to the soil, it undergoes hydrolysis (by urease enzyme) and nitrification, converting rapidly into ammonium and then nitrite/nitrate forms. These forms can be easily lost through leaching or denitrification (release as gases like Nitrous oxide). 3. The Neem coating slows down this process, particularly nitrification. This means the nitrogen is released into the soil more gradually, matching the plant's nutrient uptake pattern better. This improves Nitrogen Use Efficiency (NUE). 4. Option (B) correctly states that the Neem coating slows down the rate of dissolution (more accurately, the rate of nitrification/release of usable nitrogen) of urea in the soil. 5. Option (A) is incorrect; while soil microorganisms are involved, the main effect is inhibiting nitrification, not increasing nitrogen fixation. 6. Option (C) is incorrect; while it reduces Nitrous oxide emissions compared to uncoated urea, it does not eliminate them entirely. 7. Option (D) is incorrect; while neem has pesticidal properties, the primary purpose of the coating in this context is as a nitrification inhibitor, not a weedicide.