Abstract
Mr. Hawkes and Mr. Driver1 believe that the greatest single factor limiting the yield of Andean varieties under British conditions is the day-length requirement, thereby implying that they are, on the whole, good yielders in suitable conditions. This is not our experience, which is that many of them are thoroughly bad, even in short days. The point is material to our argument, and some experimental facts are called for.
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References
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VAN DER PLANK, J. Origin of the First European Potatoes and their Reaction to Length of Day. Nature 158, 712–713 (1946). https://doi.org/10.1038/158712c0
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DOI: https://doi.org/10.1038/158712c0
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