Cation Exchange Capacity of Crop Roots in Relation with Ion Uptake

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Abstract
The initial step of nutrients uptake by plant roots is the physico-chemical process of the exchange and adsorption of nutrients to root surface. The properties of root's surface determining the nutrients adsorption and exchange on them are mainly the cation exchange capacity and intensity. The possible role of these properties in the nutrient uptake via roots will not be understood unless the nature of the cation exchange ability of roots is clarified. The authors reported the preliminary experimental results on cation exchange capacity of crop roots1). The present paper deals with the re-examination of the various procedures, applicable to the determination of C. E. C. of the various crop roots. Discussions on the importance of the intensity of bonding of cations were also made.

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