1118 
Journal of Agricultural Research 
Vol. XXXI, No. 12 
When the precipitation during the week amounted to more than 
0.75 inch in the case of bed 2, or to more than 0.75 inch for the semi¬ 
weekly period in the case of bed 3, the total amount of precipitation 
was noted, but the surplus was not carried forward into the next 
period, as the amount of the surplus was the same for all beds. 
During the growing season soil samples were taken regularly each 
week from each of the three beds, as follows: Surface inch, 2 to 6 
inch core, 7 to 12 inch core, and 13 to 18 inch core. The moisture 
content of each core was determined. 
About one-half of the stock was transplanted in November and 
one-half in April. In the fall, at the time of transplanting, measure¬ 
ments were taken of 100 plants to show length of root in inches, 
length of stem in inches, diameter of stem at ground line in milli¬ 
meters, and length of 
leaf in inches. 
A survival count 
was made in the early 
summer and in the fall 
of 1915, at which later 
time measurements of 
height and diameter 
of stem were made. 
When the stock was 
transplanted, five seed¬ 
lings, typical of aver¬ 
age measurements, 
were selected from 
each bed and pressed. 
One of each of these 
lots of samples, photo¬ 
graphed in order to 
illustrate the differ¬ 
ence in development 
due to watering treat- 
Fig. 5.—Watering versus cultivation. Average seedlings from three rnpnt iq aVinwn in 
beds which received heavy watering only (1), watering and culti- ii. AAUj »i±uw±i m 
vation (2), and cultivation only (3) It lgure 5. 
DATA 
Seed-bed germination and survival have little bearing on the 
study, because most of the germination was purposely allowed to 
take place before differentiation in watering treatment began. The 
relative merits of the three methods of treatment must, therefore, 
be judged by their effects upon the development of the seedlings 
and the growth and survival of the stock m the transplant beds. 
The essential records are included in Tables VII, VIII, and IX. 
Table VII .—Water content of seed-bed soil under different methods of watering , 
second season , 1914 
Percentage of average moisture content 
Maxi¬ 
mum at 
1 to 6 
inches 
Mini¬ 
mum at 
1 to 6 
inches 
Method of treatment 
Surface 
inch 
1 to 6 
inch core 
7 to 12 
inch core 
13 to 18 
inch core 
Cultivation only__ _ _ _ 
23.5 
39.0 
42.1 
43.5 
Per cent 
54.3 
Per cent 
14.5 
40.4 
46.2 
Cultivation and watering__ __ 
33.4 
54.1 
57.8 
r 54.7 
69.0 
Watering only_ __ 
42.0 
56.1 
57.5 
60.3 
67.8 
