Question

02. Why does the soil become deficient in nitrogen after the harvest? Why do farme
n after the harvest? Why do farmers not add nitrogen
fertilizer in the soil in which leguminous plants are grown?​

Answer 1

let me say in short..plants use the nitrogen in the soil for their existence purpose and the leguminous plant have the nature of nitrogen fixation so external nitrogen not required.. hope it helps you

Answer 2

Answer:

The rhizobium bacteria present at the root nodules takes the free nitrogen present in the soul.

Explanation:

This is further converted into nitrogen compounds that are useful for the plants.So soil become deficient in nitrogen after harvest.

Farmers need not to add nitrogen fertilizer in the soil in which leguminous plants are grown.Because these plants not only take ,they also give some of the nitrogen compounds to the soil.