30 
Journal of Agricultural Research 
Vol. XXI, No. i 
PLAN OF THE EXPERIMENT 
About -fa acre was seeded to Plannchen barley on the Aberdeen Sub¬ 
station, Aberdeen, Idaho. This area was treated as a unit during the 
early period of growth. It received its last uniform irrigation on June 
23. The plot was then subdivided into 16 smaller plots of uniform size. 
These were inclosed by checks, and each in turn was surrounded by a 
drainage ditch. Eight of the 16 plots were chosen for the experiment. 
Plot 1 was handled so as to secure a normal development. It was irri¬ 
gated on July 10 and July 29. Plot 8 received no water after the uniform 
irrigation of June 23. Plots 2 to 7, inclusive, received only one applica¬ 
tion of water after the irrigation of June 23. Water was applied to plot 
2 on July 14, to plot 3 on July 17, to plot 4 on July 20, to plot 5 on July 
23, to plot 6 on July 26, and to plot 7 on July 29. After the irrigation 
of July 10, all water was measured, each plot receiving 300 gallons on 
the dates mentioned, except plot 2, which received only 290 gallons. 
Samples were taken on plots 1,2, and 8 daily from flowering to ma¬ 
turity. Plots 3 to 7, inclusive, were considered to be identical with plot 
8 until irrigated. Samples were taken on the day of irrigation either 
before or soon after the application of water, and daily from that time 
until maturity. The methods of sampling and of obtaining and recording 
data have been described previously, and the description will not be 
repeated here. The results are more than comparable with those re¬ 
ported in the paper on the daily development of the kernels. They are a 
part of the same data. The data from plot 1 formed the basis of the 
previous paper. As the data showing daily development have been re¬ 
ported in full for plot 1, all daily data will be omitted here. The sum¬ 
maries in the tables were obtained in the same manner as the summaries 
previously reported. Slight discrepancies sometimes occur through re¬ 
peated averages, which do not carry the fraction to sufficient decimal 
places, and through the fact that a few abnormal kernels are excluded 
in some cases. 
RESULTS 
The experimental data recorded are summarized in Table I. The 
variables recorded were length, lateral diameter, dorsoventral diameter, 
wet weight, dry weight, water, ash, and nitrogen. All these variables 
were affected by the time of application of water. The differences are 
more apparent when considered by variants than when the plot is used 
as the basis of discussion. 
