Sept. 9.1918 Deep Tilling and Dynamiting in the Great Plains 4^9 
HUNTLEY FIELD STATION 
The field station at Huntley, Mont., is located in the valley of the 
Yellowstone River at the foot of the first bench. The soil is a heavy 
gumbo clay to the depth of about 8 feet. Underlying the soil is a con¬ 
siderable depth of free-drained gravel. 
Table II presents the yields and ratios of four years for spring wheat, 
oats, flax, and corn, and three years for winter wheat at this station. 
The only consistent results to be noted either by years or by crops are 
that the com and winter-wheat crops each year have been the heavier 
on the subsoiled plot, while with flax the reverse has been true. The 
differences, however, are not enough greater than the probable error to 
make them significant, particularly when considered in connection with 
similar comparisons of the same crops at other stations. 
Table II. —Yields at the Huntley {Mont.) Field Station of spring wheat, winter wheat , 
oats f corn , and flax each year from IQ13 to 1916, 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 
on 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. 
Croop and plot. 
1913 
1914 
1915 
1916 
Average. 
Probable 
error 
of mean 
ratio. 
Spring wheat: 
Plot B . 
Plot E . 
Ratio of E to mean. 
Winter wheat: 
plot B. 
11. 8 
I 4 : 5 
no 
20 . 2 
17 - 5 
93 
25-3 
25-5 
100 
7.8 
6. 2 
89 
16. 3 
15-9 
98 
± 3-4 
25- 7 
27. 8 
104 
i 3-3 
13. 6 
101 
12. 7 
* 5-5 
no 
17. 2 
19. 0 
105 
±2. O 
Plot E. 
Ratio of E to mean. 
Oats: 
Plot B. 
Plot E . 
Ratio of E to mean . 
Com: 
Plot B . 
Plot E . 
Ratio of E to mean . 
Flax: 
Plot B. 
Plot E . 
Ratio of E to mean . 
34 - 0 
39-3 
107 
48. 4 
52. 8 
104 
56-9 
61. 9 
104 
17.8 
16, 9 
97 
39-3 
42. 7 
103 
5 
14. 8 
25-7 
127 
I 3 * 2 
13-9 
103 
40. 6 
42.5 
102 
25-4 
29. 6 
108 
23. 5 
27.9 
no 
± 4 r I 
12 * 5 
II. 9 
98 
8.4 
4*7 
72 
16. 7 
13-4 
89 
5-4 
4-5 
9 i 
10. 8 
8. 6 
88 
' ±3-7 
t 
