932 
Journal of Agricultural Research voi. xxiii,no 12 
The irrigation dates for the borders of each series during the season 
are given in Table IV. 
Table IV .—Irrigation dates 
SERIES I, IN ALE ALFA, 1919 
“Normal;” 
C1-3. 
“Medium- 
heavy,” C1-4. 
“Heavy,” 
C1-5. 
July 2 
July 2 
July 2 
13 
20 
Aug. 13 
Aug. 13 
23 
Aug. 3 
„ 13 
Sept. 3 
SERIES II AND III IN COTTON, 1919 
"Normal,” 
C1-9 and Ci-12. 
“ Medium- 
heavy,” Ci-10 
and Ci-13. 
“Heavy,” 
Ci-ii and 
Cl-I 4 - 
July 2 
July 2 
July 2 
13 
20 
30 
Aug. 6 
23 
Aug. 3 
Aug. 20 
20 
13 
Sept. 7 
28 
Sept. 7 
28 
24 
Sept. 28 
A summary of the data in Table IV shows that the “normal" borders 
of series I received only two irrigations in July and August, as compared 
with three irrigations of the “normar' borders in series II and III. The 
“medium-heavy" borders were given three irrigations in series I during 
the same months and four irrigations in series II and III. The “heavy" 
border in series I had five irrigations in July and August, while in series 
II and III they received six. 
METHODS OF RECORDING PLANT BEHAVIOR 
As a means of keeping a record of the behavior of the plants during 
the fruiting season, general notes and comparisons of the condition of 
the plants in all the borders were made frequently. More detailed 
observations were made on the rates of growth, the numbers of flowers 
produced, and the shedding of young bolls. Such data were recorded 
from July 6 to September 15, inclusive, and were obtained from sections 
of rows containing 25 plants, selected early in the season to represent 
as fairly as possible the plants of the border. 
In determining the rates of growth, the heights of the plants in the 
selected sections were measured carefully each week. The flowering 
notes were obtained by counting the number of flowers opening daily. 
