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Phosphorus is necessary for respiration, cell division and production of high-energy cell compounds.

Phosphorus is absorbed by the plants from soil in the form of phosphate ions either as H2PO4 or HPO42and required for all phosphorylation reactions.

Phosphorus makes up the structure of nucleic acids and nucleotides; and constituent of cell membranes and certain proteins.

Due to the deficiency phosphorus element plants stunted. Leaves of a phosphorous-deficient plant appear to be darker green than normal and lower leaves of the plant often purplish between veins.

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