Premium
Calcium Retention in Response to Phosphate Sorption by Soils
Author(s) -
Ryden J. C.,
Syers J. K.
Publication year - 1976
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1976.03615995004000060016x
Subject(s) - sorption , soil water , chemistry , phosphate , calcium , precipitation , environmental chemistry , mineralogy , adsorption , soil science , geology , organic chemistry , physics , meteorology
Retention of Ca increased in response to P sorption by soils, but was independent of the amounts of added Ca. Rather constant values were obtained for the molar ratio of Ca/P retained (0.19 to 0.34). Retained Ca was essentially recovered in 1 M KCl washings in contrast to the fractional recovery of sorbed P. The retention of Ca in response to P sorption by soils is interpreted as arising from a sorption rather than a precipitation reaction, and results from the increase in negative charge induced by P sorption.