Abstract
PREVIOUS work has shown that if farm yields are plotted against experimental yields they lie along a curve which has a slope of 45 degrees at low values and is almost horizontal at high values1. This occurs because, in years favourabla to the crop, farm yields do not increase by the same proportion as experimental yields.
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References
Davidson, B. R., Nature, 194, 458 (1962).
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DAVIDSON, B. Significance of Differences between Variety Yields under Experimental and Farm Conditions. Nature 207, 1009 (1965). https://doi.org/10.1038/2071009a0
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DOI: https://doi.org/10.1038/2071009a0
