The key processes of biogeochemical cycling of nitrogen are: 1. Nitrogen Fixation 2. Ammonification 3. Nitrification 4. Denitrification. 1. Nitrogen Fixation: Nitrogen fixation is a process of conversion of gaseous form of nitrogen (N2) into combined forms i.e. ammonia or organic nitrogen by some bacteria and cyanobacteria. There are free-living as well as symbiotic microorganisms which fix N2 into proteins. [...]
In this article we will discuss about the Kjeldahl method for the estimation of nitrogen in plants. Principle: Digestion of nitrogenous compounds by concentrated sulphuric acid in presence of catalysts (reduced iron powder, and a mixture of CuSO4 and K2SO4) produces ammonium compound. Further, such ammonium compound when distilled by steam in presence of strong alkali (40% NaOH soln.) produces [...]
In this article we will discuss about:- 1. Nitrogen Cycle in Plants 2. Biological Nitrogen Fixation of Plants 3. Synthesis of Amino Acids in Plants 4. Protein Synthesis in Plants 5. Soil Less Culture (Hydroponics) 6. Application of Fertilizers. Contents: Nitrogen Cycle in Plants Biological Nitrogen Fixation of Plants Synthesis of Amino Acids in Plants Protein Synthesis in Plants Soil [...]