The fixation and release pattern of NH4 and K are related in any ways to the physical and chemical characteristics of soil minerals and the environmental conditions of the soils.In the present study an attempt was made to investigate the fixation characteristics of three major nutrients.by sandy clay loam.A red sandy clay loam soil(CEC 13.9 me/100 g. of soil)from Coimbatore.belonging to Palathurai series was air dried,sieved through 2 mm sieve and 500 g.of soil was taken in wide mouthed glass jars.
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