Studies on the Fixation of Ammonium and Phosphate ions as Influenced by Organic Matter and Free Oxides of Iron and Aluminium

Dept. of Agrl. Chemistry and Soil Science, Bidhan Chandra Krishi Viswa Vidyalay, Kalyani, Nadia University College of Agriculture, Calcutta University Manuscript received 14 September 1977, accepted 9 January 1980 The effect of organic matter and free oxides of iron and aluminium on the fixation of ammo­nium and phosphate ions in some soils of West Bengal has been studied. Ammonium fixation decreased and phosphate fixation increased in the organic matter free soils while the reverse was the case in the free oxides removed soils