Question

Chemistry of soil nitrogen​

Answer 1

soil nitrogen is fixed by some microorganisms which are in symbiotic relationship with plants like rhizobium .they fix the atmospheric nitrogen into the soil..

Answer 2

Answer:

Nitrogen in organic materials (plant residues, animal manures, sewage, soil organic matter) is present as part of proteins, amino acids and other plant and microbial materials. It becomes available to plants only after the compound is decomposed by soil microorganisms.