Journal of the Indian Society of Soil Science
SCOPUS
  • Year: 2000
  • Volume: 48
  • Issue: 3

Studies on Kinetics of Potassium Release in Surface Horizons of Three Soil Series of Rajasthan

  • Author:
  • R.R. Sharma, B.N. Swami
  • Total Page Count: 6
  • Page Number: 472 to 477

Department of Agricultural Chemistry and Soil Science, Rajasthan College of Agriculture, Udaipur, Rajasthan, 313001.

Abstract

Three soil series namely Chambal, Chomu and Pali (two horizons, Ap and A from each series) were studied for K release kinetics using 0.3N NaTPB, 1M NH4Ac, 0.01M BaC12, 0.01M CaCl2 and 0.01M oxalic acid as extractants. Kinetics of K release was described by using first order, Elovich, parabolic diffusion and power function equations. Most of the soils and soil fractions followed parabolic diffusion equation indicating that K release is controlled by diffusion. Clay fraction of each soil was found to release more K. Ap and A horizons of each soil series followed similar type of release kinetics.

Keywords

Kinetics of K release, first order, Elovich, parabolic diffusion, power function equations