Question

Mention two ways by which soil can get nitrogen.

What are the two ways by which soil can get nitrogen?

Answer 1

1. Use of fertilizer: Chemical fertilizers (like urea) or organic fertilizers (like manure) add nitrogen directly to the soil.
2. Crop rotation: Rotation of crops is a system in which farmers grow pulses or leguminous crops after the harvest of a soil-exhausting crop. Through this method the soil retains its fertility or gets back the nitrogen.