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Evidence against relationships between root cation exchange capacity & cation uptake by plants



Evidence against relationships between root cation exchange capacity & cation uptake by plants



Nature. London, 200: 1344-1345



Italian, ryegrass was grown in a clay loam at three constant temperatures, IT, 19.5 degrees & 28: C, & six levels (0-500 ppm) of NO3-N for 9 weeks, with constant mineral nutrition. The cation-exchange capacity (CEC) of the roots & cation composition of the grass were determined. The results showed that the differential uptake of mono- & divalent cations was not related to root CEC which did not vary with the N content of the grass & was not correlated with the sum of cations in the grass.

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