Abstract
IN the Monthly Weather Review for February last, Messrs. J. B. Kincer and W. A. Mattice give examples of the practical application of a method of showing the relationship between the yield of a crop and various meteorological factors affecting it during its period of growth. The figures relate to wheat in North Dakota and Ohio. The method may be described as a modification of ordinary partial correlation suitable to cases where so many factors are involved that full treatment by the ordinary methods of partial correlation would involve an excessive amount of computation. The final result takes the form of a regression equation between the yield x and a limited number of such weather factors as are found to have significant simple correlation with x. In each of the examples given these factors combined are equivalent to a single meteorological variable giving a correlation coefficient of 0.93 with x. The method of calculation is as follows:
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N., E. The Relationship of Crop Yield and Weather. Nature 122, 258 (1928). https://doi.org/10.1038/122258b0
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DOI: https://doi.org/10.1038/122258b0