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Evaluation of available phosphorus and potassium in soil using a common extractant



Evaluation of available phosphorus and potassium in soil using a common extractant



Agricultural Research Journal of Kerala 24(2): 151-162



A laboratory evaluation and an uptake study Neubauer seedling technique was carried out for evolving a single common extractant suitable for extracting available P and available K so as to simplify the process of extracting these available plant nutrients in soil testing work. The study was conducted in three phases, viz., an initial study, preliminary screening and a final selection using different extractants. The triacid (0.06 N H2SO4 + 0.05 N HCl + 0.05 N oxalic acid) with a soil solution ratio of 1:10 and equilibration period of 30 min was found to give very good correlation with Bray No. 1 P and NH4OAc (std) K and this extractant can be recommended for different soils of the state.

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Accession: 001589194

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