Q. Nitrogen is present in the soil in the form of I. Nitrates II. Ammonical salts II. Nitrite IV. None of these
A) Only I
B) Only III
C) I and II
D) Only IV
Explanation
The ultimate source of nitrogen is atmosphere. It is fixed in usable forms by several biological and non-biological agencies. Nitrogen is also present in the soil in the form of nitrates and ammonical salts
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.