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Part of thesis submitted by the senior author in partial requirements for the degree Doctor of Philosophy in Soil Science.
Assistant and Professor of Soil Science respectively
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Helmy, A.K., Elgabaly, M.M. Exchange capacity of plant roots. Plant Soil 10, 93–100 (1958). https://doi.org/10.1007/BF01343739
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DOI: https://doi.org/10.1007/BF01343739