Question

Name the micro-organisms present in the soil and in the root nodules of leguminous plants which can fix atmospheric nitrogen.

Answer 1

Explanation:

rhizobia bacteria

Legume family

They contain symbiotic rhizobia bacteria within nodules in their root systems, producing nitrogen compounds that help the plant to grow and compete with other plants. When the plant dies, the fixed nitrogen is released, making it available to other plants; this helps to fertilize the soil.

Answer 2

Rhizobium bacteria is a fixer of atmospheric nitrogen

Explanation:

The system of cultivating a leguminous crop between two cereals crops is called crop rotation. Crop rotation is very helpful for the soil because it improves the fertility of the soil by replenishing it with nitrogen and increases the production of food grains. Leguminous plants contain the Rhizobium bacteria which are present in the root nodules of the plant. These bacteria can fix atmospheric nitrogen in the soil . Thus the next crop will require less amount of nitrogen fertilizer.