Mar. 24,1923 
Summer Irrigation of Pima Cotton 
937 
Effort was made to correlate these fluctuations with temperatures and 
other factors, and some indications of correlation were found, but not 
enough to justify elaboration on the basis of such limited material. 
Until more definite knowledge is gained as to when the opening of a 
bud is determined, or what combinations of conditions cause the stimu¬ 
lus to be given, there is little basis for figuring correlations. The fluctua- 
£ 
20 
1 
FLOWERS 
ILLS SHED 
a -uhl 
3 9t/r A 
cCiL 
i&s 
a/ ~/o 
MEDIUM 
H&MT 
r\ 
L 
yvl 
A A, S' 
\//*& 
C/-SM 
VtMfiL 
' IK 
, J 
s/vM 
<1/2# 
KSL'Ly' /X/6. 
Vk». 4.—-Numbers of flowers produced and bolls shed each day on 25-plant section of series II, compared 
with the irrigation dates. Note the Jack of consistency of behavior at any regular period after irrigation 
The arrows indicate irrigation dates. 
tions shown in figure 3 give a general impression of periodicity, but 
there is no evidence of regularity. Also, the general consistency of 
flower production between borders would seem to indicate a short 
period between the determining factors, or stimuli, and the flowering 
•dates; but with so little known regarding these features, it seems better 
to present the data without hazarding explanations. 
