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Effect of adsorbed cations and free salts on phosphate fixation in some egyptian alkaline soils
Author(s) -
Tobia S. K.,
Milad N. E.
Publication year - 1954
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740050310
Subject(s) - chemistry , potassium , magnesium , calcium , sodium , phosphate , adsorption , inorganic chemistry , soil water , alkali soil , potassium phosphate , environmental chemistry , nuclear chemistry , biochemistry , organic chemistry , geology , soil science
The effect of adsorbed calcium, magnesium, potassium and sodium on the fixation of phosphate in soil was studied. The fixing power of the cations was in the order Ca > Mg > K > Na. The carbonates, sulphates and chlorides of the corresponding cations were found to affect the concentration of water‐soluble phosphate. Potassium and sodium carbonates increased the concentration but all other salts tended to decrease it. The effect of such salts was more pronounced with magnesium, potassium and sodium soils and increased with increase of base‐exchange capacity of the soil. In a calcium soil this effect was very small and fixation was brought about mainly by the adsorbed calcium.