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A Comparison of the Amounts of Phosphorus Removed from Different Soils by Various Extractants
Author(s) -
Breland H. L.,
Sierra F. A.
Publication year - 1962
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/sssaj1962.03615995002600040013x
Subject(s) - phosphorus , extraction (chemistry) , soil water , chemistry , environmental chemistry , environmental science , soil science , chromatography , organic chemistry
The relative effects of 8 extractants on the removal of phosphorus from 7 major soil types of Florida were studied. HCl and NH 4 F and HCl and H 2 SO 4 solutions extracted more phosphorus than the other extractants. The amount of phosphorus extracted by any of the extractants apparently depended, to a large extent, on the kind and amount of phosphorus compounds present in the soil as well as other factors. It was found that soils high in phosphorus required a longer extraction period to reach equilibrium than those low in phosphorus. Increasing the length of stroke of the shaking machine from 1½ to 3 inches did not significantly affect the amount of phosphorus removed from the soils. In general, an extraction time of 10 to 15 minutes was sufficient for the extraction of soil phosphorus.