Abstract
The yields of wheat grain and straw obtained by Mercer & Hall in their classic uniformity trial have been re-analysed, and two-dimensional correlograms and spectra computed. The results for both grain and straw show a striking periodicity in the west-east dimension with a wavelength of three rows of plots, equal to between 33 and 50 ft (10 m-15 m). This wavelength is somewhat less than the width of the plough lands at the time of the trial, and is attributed to an earlier ridge and furrow system. The correlogram and spectrum for straw yield show some periodicity in the north-south dimension, probably caused by ploughing at right angles to the current lands in one or more previous seasons.
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Schedule a callMore From: International Statistical Review / Revue Internationale de Statistique
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