494 
Journal of Agricultural Research 
Vol. XIV, No. XI 
Table VI.— Yields at the Scottshluff (Nebr.) Field Station of spring wheat, oats, barley, 
and corn each year from igiz to igi6, inclusive, on plot E, subsoiled, and plot B, not 
subsoiled but otherwise similarly treated, together with the average of each method for 
the entire period of years; the ratio of the yield on E to the mean of the yield of B and E 
each year; the mean ratio; and the probable error of the mean ratio 
[Yields of all crops in bushels per acre] 
Yield or ratio. 
Crop and plot. 
1912 
1913 
1914 
1915 
19x6 
Average. 
Prob¬ 
able 
error of 
mean 
ratio. 
Spring wheat: 
Plot B. 
Plot E . 
Ratio of E to mean. 
Oats: 
Plot B. 
Plot E. 
Ratio of E to mean. 
Barley: 
Plot B. 
Plot E. 
Ratio of E to mean. 
Cora: 
Plot B... 
Plot E. 
Ratio of E to mean. 
6.3 
12. 3 
132 
7*8 
6.3 
89 
6. 7 
9-5 
117 
16. 2 
6.8 
59 
5*7 
7.0 
no 
8.5 
8.4 
101 
± 9-3 
21. 6 
27. 8 
113 
16. 9 
i 7-5 
102 
14.7 
x 5 * 9 
104 
39*7 
48. 1 
no 
7.2 
2.8 
56 
20. 0 
22. 4 
97 
±6. 9 
23-5 
24. 8 
103 
4.4 
S 'l 
108 
35*4 
2 6. 0 
85 
10. 0 
6. 0 
75 
18.3 
15*5 
93 
±6. 2 
38. 0 
40. 0 
103 
32. 2 
26.1 
90 
20.1 
14. 2 
83 
10. 1 
13.6 
US 
22.1 
23. 2 
102 
24.5 
23*4 
99 
± 4 -1 
ARCHER FIEED STATION 
The soil of the field station at Archer, Wyo., is a medium-dark sandy 
loam with a little fine gravel distributed very evenly through it. Below 
the second foot the proportion of sand increases, and at a depth varying 
from 3 to 6 feet pure gravel is reached. 
Table VII presents three years' results with spring wheat, winter wheat, 
and oats, and two years' results with corn and barley at this station. 
Of the 13 comparisons afforded only 5 appear to be in favor of subsoiling. 
Only with com has the heavier yield for more than one year been from the 
subsoiled plot. The average differences exhibited by all crops are in¬ 
significant when considered in connection with the probable error. 
