Phosphorus in soils occurs almost exclusively in the form of orthophosphate with total P concntrations usually in the range of 500–800 mg/kg dry soil. Quite a substantial amount of this P is associated with organic matter and in mineral soils the proportion of organic P lies between 20 and 80% of the total P.
KeywordsPhosphorus Starch Calcite Photosynthesis Fructose
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