10 
BULLETIN 268, U. S. DEPARTMENT OP AGRICULTURE. 
than in time of plowing, the plat under the heading "Late fall 
plowed" having been plowed shallower than the one headed "Early 
fall plowed." At Huntley the results seem to have favored shallow 
plowing. The chief thing to be noted in the results from these 
stations is the general lack of difference in the yields from methods 
other than summer tillage. At the Judith Basin station summer 
tillage has increased the yields from five to six bushels per acre. The 
increase has not been sufficient to pay for the increased cost of 
production by this method. Huntley has only two years' record. 
During these years the average yield of winter wheat on summer- 
tilled land has been over 40 bushels per acre as compared with yields 
of about 30 bushels from other methods. This makes both the 
yield and the profit from winter wheat after summer tillage at this 
station greater than by any other method at any station. 
Table III. — Average yields and digest of cost of production per acre of winter wheat by 
different methods of tillage at ten stations in the Great Plains area. 
Points covered. 
Early fall 
plowed. 
Late fall 
plowed. 
Disked. 
Listed. 
Subsoiled. 
Green 
manured. 
Summer 
tilled. 
►"8 
Yields (bushels): 
Judith Basin. 
Huntley 
Belle Fourche. 
Scottsbluff.... 
North Platte... 
Akron 
Hays 
Garden City. . 
Dalhart 
Amarillo 
19.8 
25.7 
11.6 
10.6 
10.6 
14.1 
15.8 
1.1 
2.5 
8.2 
20.2 
30.8 
8.4 
6.4 
22.5 
29.5 
19.8 
26.2 
9.7 
20.0 
27.8 
10.5 
2 23.5 
32.4 
14. 
15.3 
13.3 
11.6 
1.2 
3.0 
7.2 
Cost of production 
Profit or loss ( — ): 
Judith Basin 
Huntley. 
Belle Fourche 
Scottsbluff 
North Platte 
Akron 
Hays 
Garden City 
Dalhart 
Amarillo 
$6.56 
7.30 
11.43 
1.56 
.86 
.86 
3.31 
4.50 
-5. 79 
-4.81 
- .82 
$5.85 
8.29 
15.71 
.03 
- .63 
3.46 
2.27 
-5.01 
-3.75 
- .81 
19.2 
12.4 
1.5 

6.9 
14.7 
19.4 
1.5 
2.5 
6.4 
11.8 
19.1 
1.1 
16.7 
14.2 
2.6 

7.7 
25.7 
41.1 
18.4 
19.9 
30.8 
21.8 
21.7 
2.8 
3.3 
10.7 
$4.75 
15.90 
$5.55 
8.31 
12.79 
1.24 
$7.17 
6.83 
12.29 
.18 
$14.61 
$11.50 
5.67 
8.07 
-"3. "96" 
10.69 
3.93 
-3.70 
4.74 
8.03 
-4.50 
-3.80 
-1.07 
1.09 
6.20 
-6.40 
■ 2.92 
■ 4.67 
■12.79 
17. 
1. 
2. 
10. 
3. 
3. 
-9. 
-2.34 
At North Platte, data for a sufficient number of years to be of value 
are available for only two methods, early fall plowing of land con- 
tinuously cropped to winter wheat and summer tillage. The average 
yield from summer tillage has been 30.8 bushels and from continuous 
cropping only 10.6 bushels per acre. At Belle Fourche, Scottsbluff, 
Akron, and Hays, early fall plowing has increased the yields over late 
fall plowing. A still greater increase has been obtained by growing 
