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Phosphate sorption by Greek alkaline soils evaluated with a modified Freundlich Equation
Author(s) -
Nychas Anastasios E.
Publication year - 1982
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19821450612
Subject(s) - freundlich equation , sorption , soil water , adsorption , chemistry , phosphate , calcareous , bicarbonate , calcareous soils , alkali soil , phosphorus , environmental chemistry , soil science , geology , organic chemistry , paleontology
Abstract Phosphate adsorption of calcareous and non calcareous alkaline Greek soils was studied using the Freundlich Equation modified as to take also into account q , the quantity of phosphorus (P) already existing in these soils. Relatively high amounts of phosphate added were adsorbed, with a minimum of 44.5% at the highest level of P addition, being 600 μg P/g soil. The fit of the modified Freundlich Equation to the experimental data was best, when the values of bicarbonate extractable P were assigned to q , in comparison to both lower and higher values, Correction for q as above, resulted also in a statistically significant positive relationship between the Freundlich coefficient a , a capacity term with respect to P adsorption, and OM of the soils studied.