Hayes and Garber - Cucurbit Breeding

FIELD PLOT TECHNIC 55
i.e., a progressive difference of 25 Ib. for each plot in either direction
from the central one. The corrected yields are found in
the last column of the table. Note that the probable error is
3 per cent, less in the corrected than in the uncorrected yields.
The method outlined above may be used only where there are
a comparatively large number of similarly treated plots and
where the increase or decrease in yield across a field is fairly
consistent. If check plots are grown every third to fifth plot
as they frequently are, a direct correction for yield is sometimes
made as follows :
DIAGRAM ILLUSTRATING DISTRIBUTION OF CHECKS