A study of the different forms of P in the Vellayani and Neyyattinkara series of the red loam soils (oxisols) of Kerala indicated that organic P constituted about 48-51 % of the total P in both soil series. The different fractions of inorganic P were in the order, Red-P Fe-P Saloid-P AI-P Occl-P Ca-P in the Vellayani series; whereas in the Neyyattinkara series it was in the order Red-P Saloid-P Fc-P Ocel-P AI-P Ca-P. Available P showed significant positive correlation with Al-P and Organic-P and no significant correlation was obtained with Saloid-P and Fc-P.
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