What are the conditions necessary for fixation of atmospheric nitrogen by Rhizobium. What is their role in `N_(2)` -fixation?

What are the conditions necessary for fixation of atmospheric nitrogen by Rhizobium. What is their role in N2-fixation?

(i) What are the conditions necessary for fixation of atmospheric nitrogen by Rhizobium. What is the their role in N_2 fixation. (ii) Why is that in certain plants deficiency symptoms appear first in younger parts of the plant while in others they do so in mature organs.

What are the conditions necessary for fixation of atmospheric nitrogen by Rhizobium. What is their role in Nz-fixation ?

What are the conditions necessary for fixation of atmospheric nitrogen by Rhizobium? What is their role in Ny-fixation ?

List any two conditions necessary for fixation of nitrogen by Rhizobium.

An important method of fixation of atmospheric nitrogen is

What is atmospheric nitrogen fixation?