SPRING WHEAT IN THE GREAT PLAINS AREA. 
27 
Table XIII. — Yields and cost of production of spring wheat by different methods at the 
North Platte Field Station, 1907 to 1914, inclusive. 
Treatment and previous 
Number 
of plats 
averaged. 
Yield per acre 
(bushels). 
crop. 
1907 
1908 
1909 
1910 
1911 
1912 
1913 
1914 
Average. 
Fall plowed: 
2 
2 
1 
22.5 
2(1.3 
26. 
2S.7 
27.3 
27.3 
21.3 
16.0 
15.3 
7.6 
6.8 
6.7 



6.4 
4.7 
11.2 
4.1 
1.3 
1.8 
5.5 
6.1 
5.2 
12.0 
Oats 
11.1 
Wheat 
11.7 
Total or average... 
5 
24.7 
27.8 
18.0 
7.1 
6.7 
2.5 
5.7 
1L6 
Spring plowed: 
1 
1 
1 
1 
23.7 
20.8 
24.5 
23.5 
24.0 
17.5 
22.7 
20.3 
17.2 
16.7 
23.0 
16.3 
5.2 
8.7 
6.8 
8.7 




5.3 
8.8 
12.8 
3.8 
1.5 
1.8 
2.0 
3.3 
5.0 
2.2 
6.0 
5.2 
10.2 
Oats 
9.6 
Wheat 
12.2 
10.1 
Total or average... 
4 
23.1 
21.1 
18.3 
7.4 
7.7 
2.2 
4.6 
10.6 
Disked: 
Com 
8 
1 
24.5 
24.2 
14.5 
7.3 

4.6 
5.2 
3.0 
4.2 
5.1 
6.9 
10.4 
5 4 
Total or average... 
9 
a 24. 5 
a 24. 2 
a 14. 5 
a 7. 3 
a 4. 6 
3.1 
5.3 
10.5 
3 
28.9 
41.4 
22.6 
15.3 

7.1 
6.8 
12.5 
16.8 
24.7 
26.3 
17.1 
8.7 
6 6.4 
c3.2 
6.3 
11 6 
Summary of Yields and Digest of Cost. 
Tillage treatment. 
Previous crop. 
Yields, values, etc. (average per 
acre). 
Fall 
plowed 
(5 plats). 
Spring 
plowed 
(4 plats). 
Disked 
(8 plats). 
Summer 
tilled 
(3 plats). 
Corn 
(11 plats). 
Small 
grain 
(5 plats). 
Sorghum 
(1 plat). 
Yields of grain: 
1907 bushels. . 
1903 do.... 
1909 do 
1910 do.... 
1911 do.... 
1912 do.... 
1913 .do.... 
1914 do.... 
24.7 
27.8 
18.0 
7.1 

6.7 
2.5 
5.7 
23.1 
21.1 
18.3 
7.4 

7. 7 
2.2 
4.6 
24.5 
24.2 
14.5 
7.3 

4.6 
3.0 
5.1 
28.9 
41.4 
22.6 
15.3 

7.1 
6.8 
12.5 
24.1 
25.0 
16.0 
7.1 

5.0 
3.0 
5.2 
24.8 
24.4 
17.4 
7.2 

8.4 
1.6 
5.1 
23.5 
20.3 
16.3 
8.7 

5.8 
3.3 
5.2 
Average do 
11.6 
10.6 
10.4 
16.8 
10.7 
11.1 
10.1 
Crop value, cost of production, 
etc.: 
Value 
$8.12 
6.56 
$7. 42 
6.09 
$7.28 
4.75 
$11. 76 
11.50 
Cost 
Profit 
1.56 
1.33 
2.53 
.26 
a Average of 8 plats. 
b Average of 22 plats. 
c Average of 23 plats. 
Some of the results of the work of eight years are exhibited in 
Table XIII. Three of these years have been productive of good to 
heavy crops of wheat; in four years the average yields were light; 
and in the remaining year under study the crop was a total failure 
on account of drought, together with some damage from grass- 
hoppers. The general averages of spring-wheat yields for the eight 
years range from 9.6 to 16.8 bushels per acre, according to the prepa- 
ration and previous cropping of the land. A comparison of the 
