Question

4. Atmospheric nitrogen cannot be taken directly from atmosphere by plant, but it is an
essential component. How do they take nitrogen?​

Answer 1

because the bacteria present in the root nodules of the leguminous plants convert atmospheric nitrogen to nitrogen compounds which are easily soluble in soil.

Answer 2

Answer:

One natural way to convert nitrogen into nitrates for plants happens with lightning. Many factories also release chemicals and pesticides that help transfer nitrogen from air to nitrates which the plant can absorb.

There are some bacteria in roots of plants they convert the gas nitrogen in the soluble form.

For the full procedure just have a look at the nitrogen cycle..