Journal of the Indian Society of Soil Science

SCOPUS
  • Year: 1996
  • Volume: 44
  • Issue: 2

Phosphorus Adsorption in Relation to Soil Characteristics of Vertisols Derived from Different Parent Materials

  • Author:
  • I.Y.L.N. Murthy, T.G. Sastry, S.C. Datta, G. Narayanasamy, R.K. Rattan
  • Total Page Count: 6
  • DOI:
  • Page Number: 224 to 229

Division of Soil Science and Agricultural Chemistry, Indian Agricultural Research Institute, New Delhi, 110012.

* Present address: Directorate of Oilseeds Research, Rajendra Nagar, Hyderabad, 500030, Andhra Pradesh.

Abstract

Phosphorus adsorption behaviour of Vertisols derived from different parent materials was studied. Both Langmuir and Freundlich adsorption isotherms gave good fits when native phosphorus pool was also considered while fitting the adsorption isotherms. Vertisols derived from basaltic and limestone have high phosphorus adsorption capacities compared with those of grey shale, granodiorite and granitic-granodiorite parent materials. Mean adsorption maximum values for different pedons may be arranged as: pedon 5 (limestone) > pedon 2 (basalt) > pedon 1 (grey shale) > pedon 3 (granitic-granodiorite) > pedon 4 (granodiorite). Phosphorus adsorption is significantly correlated with clay content.

Keywords

Phosphorus adsorption, Langmuir/Freundlich adsorption isotherms, Vertisols, parent materials, soil characteristics