INORGANIC SOIL PHOSPHORUS FRACTIONS OF SOME ONTARIO SOILS AS STUDIED USING ISOTOPIC EXCHANGE AND SOLUBILITY CRITERIA
- 1 February 1962
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Soil Science
- Vol. 42 (1), 150-156
- https://doi.org/10.4141/cjss62-020
Abstract
The water soluble and inorganic phosphates associated with aluminum (Al-P), iron (Fe-P) and calcium (Ca-P) were studied in eight Ontario soils. Isotopic exchange studies indicated that in most of the soils the Al-P fraction was in equilibrium with the water soluble phosphorus. Exceptions were thought to be a result of high or low pH values. Solubility studies in 0.01M CaCl2 indicated that the Al-P fraction supplied most of the phosphorus to the soil solution. In one soil the Fe-P fraction may have supplied a measurable amount of phosphorus to the soil solution also.Keywords
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