OBJECTIVE FORESTRY

Detailed explanation-1: -The first stable product of fixation of atmospheric nitrogen in leguminous plants is ammonia. This is catalysed by enzyme nitrogenase. Q. Leguminous plants are able to fix atmospheric nitrogen through the process of symbiotic nitrogen fixation.

Detailed explanation-2: -During the conversion of nitrogen cyano bacteria will first convert nitrogen into ammonia and ammonium, during the nitrogen fixation process. Plants can use ammonia as a nitrogen source. After ammonium fixation, the ammonia and ammonium that is formed will be transferred further, during the nitrification process.

Detailed explanation-3: -Biological nitrogen fixation (BNF) occurs when atmospheric nitrogen is converted to ammonia by a nitrogenase enzyme.

Detailed explanation-4: -Atmospheric nitrogen cannot be absorbed directly by the plants so it is first converted into stable compound ammonia (NH3) in the roots, with the help of symbiotic bacteria. N2 → N2H2 → N2H4 → 2NH.