446 BOTANICAL GAZETTE [DECEMBER 
in strip 3 were not fully mature when harvested, as may be seen 
from their low percentage of sugar. The row numbers run con- 
secutively, but only every tenth row is numbered in the figures. 
The regularity in the trend of mean percentages of sugar in 
figs. 24-29 and of mean yields of sugar in fig. 30 shows that soil 
irregularities have a marked influence on the behavior of progeny 
rows and check rows. The close agreement of progeny rows and 
check rows is remarkable and shows the advantage of employing 
Row numbers 
oo ff SS 5S oc f S&S: = Ss So S&S. Ss SS 
i. oy my EM we NM oe OS S > Ne = Ny 2 ¥ 
16 ef ~ 
! 
1§ ‘ ! p 
Q 9 § © 
Se Q : as { ans 
Maite Pood |. fe 7 | 
ee e ms 
5 a! wey | 
4] 
Fercentage of sugar 
a 
Fic, 28.—Effect of soil irregularities on percentage of sugar of check and progeny 
rows, Madison, 1914; solid line indicates progeny rows (Morrison’s Kleinwanzleben); 
broken line, check rows. 
frequent checks over the use of the mean value of the progeny 
rows as a standard of comparison. If the graphs are examined 
closely, it will be noted that a progeny row and its check rows 
frequently vary in opposite directions, although following the 
general trend of neighboring rows. Occasionally these peculiarities 
may be due to the hereditary nature of the progeny row of beets, 
but more frequently they are the result of local soil disturbances, 
as may be seen from similar deviations of check rows from their 
general trend. On the average the consecutive deviations of 
check-rows from their trends appear smaller than the corresponding 
deviations of the progeny rows. Hence real differences between 
progeny rows may exist, but they are small in comparison with the 
fluctuations. 
