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Studies on the Use of Radioactive K-40 in the Determination of Plant Available K in Some Hawaiian Soils

  • Author:SP. PALANIAPPAN

    p-ISSN:0024-9602, e-ISSN:2582-5321, Vol:64, Issue:mar-mar

    DOI: https://doi.org/10.29321/MAJ.10.A03161
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Abstract

                                With a view to study the usefulness of the naturally occurring radioactive K-40 in characterising the labile pool of soil K as a meaure of available K. a study was undertaken with eleven Hawaiian soils representing different stages of development and fertility. Labile pool was determined using K-40 as tracer and this was compared to X extracted by successive leaching of soils with 0.01 M CaCl. exchangeable K and X romoved by 4 week old corn seedlings grown in pots. Labile pool K is very closely related to plant uptake and so can be used as a successful parameter in characterising soil K fertility status.

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ISSN : 0024-9602
eISSN : 2582-5321

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