About Us | Help Videos | Contact Us | Subscriptions
 

Abstract

 

This article in SSSAJ

  1. Vol. 54 No. 5, p. 1254-1260
     
    Received: Sept 8, 1988
    Published: Sept, 1990


    * Corresponding author(s):
 View
 Download
 Alerts
 Permissions
 Share

doi:10.2136/sssaj1990.03615995005400050009x

Phosphorus Release in Sodium Ion Dominated Soils

  1. Raj K. Gupta ,
  2. R. R. Singh and
  3. K. K. Tanji
  1. Central Soil Salinity Res. Inst., Karnal 132001, Haryana, India
    G. B. Pant, Univ. of Agriculture and Technology, Pantnager 263145, U.P., India
    Dep. of Land, Air, and Water Resources, Univ. of California, Davis, CA 95616

Abstract

Abstract

Calcareous sodic soils having high sodicity and high pH often maintain high solution P concentration. The effect of high exchangeable Na, high pH, and alkali anions and carbonates on the release of inorganic P was investigated in soils representing the three major benchmark sodic soil series found in the Indo-Gangetic plains of India. Sodium saturation of the exchange complex, high pH, carbonate ions, and low electrolyte level shifted the solid P-solution P equilibrium in favor of maintenance of high P concentrations in aqueous solutions. In the sodic soil environment, release of P can be accounted for by the dissolution of various forms of Ca-P compounds at high alkalinity and pH. Cultivation of alkali soils improves the organically bound P forms. Together or in combination, high sodicity, high pH, and the presence of carbonate ions at low salinity markedly increased P desorption and P availability in sodic soils.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © . Soil Science Society of America