Dr Sanjib Kar1
1University Of Calcutta, Kolkata, India
The aim of this study were to find out the fate of amino acid on humification processes in soil. For this study humic acid were extracted from jalpaiguri forest soil and treated with eleven different amino acids with or without clay. It was observed that cation exchange capacity and electric potential decreases with time whereas N content, molecular weight and % aromiticity of humic molecule increase with time. Infrared and C13 nuclear magnetic resonance spectra established that various groups of amino acids react with each other converted to peptide ,poly-peptide and finally protein part in humic molecule. Carbon % , N % and protein content of humic molecules increase from 55.4 – 57.1, 3.5 – 4 and 13.575 – 24.725 mgg-1respectively within one year reaction . From this study it is clear that amino acids in soil on association converted to peptide –polypeptide and protein and that became a part of humic molecules during humification process.