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Phosphorus in calcareous soils. III. —‘Available’ phosphate in calcareous soils as measured by five chemical methods and phosphate uptake by rye‐grass in a pot test
Author(s) -
Gupta M. B. Sen,
Cornfield A. H.
Publication year - 1963
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.2740140806
Subject(s) - phosphate , chemistry , calcareous , soil water , phosphorus , calcareous soils , bicarbonate , ammonium , sodium bicarbonate , environmental chemistry , ammonium oxalate , ammonium bicarbonate , sodium , inorganic chemistry , nuclear chemistry , botany , environmental science , biochemistry , organic chemistry , soil science , raw material , biology
The amounts of phosphate extracted by o.2N‐ammonium oxalate, o.5M‐sodium bicarbonate (pH 8.5), Morgan's reagent and carbon dioxide‐charged water from 15 calcareous soils (o.10–49.8% C a CO 3 ) were all significantly correlated with each other. Phosphate extracted by o.o3N‐ammonium fluoride in o.IN‐hydrochloric acid was not correlated with that obtained with the other methods. Total uptake of phosphorus by rye‐grass in pot tests using these soils was significantly correlated only with phosphate extracted by o.5M‐sodium bicarbonate and carbon dioxide‐charged water.