Abstract
THE size attained by a scion apple tree grafted to a clonal rootstock may be modified by interaction between them; but this size is primarily an expression of root-stock effect, and it is usually similar to that of the unworked stock. The vigour rating1 assigned to the latter is stated in terms of its effect on the ultimate size of scions.
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References
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TAPER, C., LING, R. Relation of Electrical Resistance to Vigour of Apple Scions. Nature 203, 782–783 (1964). https://doi.org/10.1038/203782a0
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DOI: https://doi.org/10.1038/203782a0
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