Abstract
IN view of a recent report by Hallsworth et al.1 that copper stimulates nitrogen fixation by subterranean clover (Trifolium subterraneum), the following evidence from a field trial is presented as indicating a similar function of copper in nitrogen fixation by white clover (T. repens).
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Hallsworth, E. G., Wilson, S. B., and Greenwood, E. A. N., Nature, 187, 79 (1960).
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VAN DER ELST, F., McNAUGHT, K. & ROLT, W. Effect of Copper Deficiency in White Clover on Nitrogen Fixation. Nature 192, 1315 (1961). https://doi.org/10.1038/1921315a0
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DOI: https://doi.org/10.1038/1921315a0
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