26 
BULLETIN 214, U. S. DEPARTMENT OF AGRICULTURE. 
Table XII. — Yields and cost of production of spring wheat by different methods at the 
Scottsbluff Field Station, 1912, 1913, and 1914. 
Num- 
ber of 
Yield per acre (bushels). 
Treatment and 
previous crop. 
Num- 
ber of 
plats 
aver- 
aged. 
Yield per acre (bushels). 
previous crop. V ye *_ 
aged. 
1912 
1913 
1914 
Aver- 
age. 
1912 
1913 
1914 
Aver- 
age. 
Fall plowed: 
Corn 
Manured 
1 
1 
11.6 
20.8 
7.7 
6.3 
8.0 
9.8 
9.0 
7.8 
9.5 
9.5 
10.3 
6.7 
9.7 
13.4 
9.0 
6.9 
Listed: 
Wheat 
Subsoiled: 
Wheat 
Disked: 
Corn 
Green manured: 
Rve 
1 
1 
11 
1 
1 
15.0 
12.3 
19.1 
15.0 
11.7 
7.2 
6.3 
11.8 
6.0 
9.5 
11.1 
9.4 
9.4 
14.0 
Oats 
Wheat 
2 
1 
T o t a 1 or 
average . 
5 
10.8 
8.7 
9.3 
9.6 
13.0 
14.2 
13.6 
12.0 
13 9 
Peas 
Total or 
average . 
Summer tilled . . 
Average of all 27 
12.6 
Spring plowed: 
Corn 
Oats 
Sorghum 
Wheat 
17.3 
11.7 
18.7 
8.7 
11.3 
9.5 
11.2 
12.0 
11.0 
12.0 
9.0 
5.7 
13.2 
11.1 
13.0 
8.8 
1 
1 
1 
1 
4 
2 
13.4 
13.6 
12.8 
13.3 
3 
27.8 
1S.1 
13.8 
19.9 
T o t a 1 or 
14.1 
11.0 
9.4 
11.5 
27 
17.0 
11.6 
10.7 
13.1 
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 
(11 
plats). 
Listed 
(1 plat). 
Sub- 
soiled 
(1 plat). 
Green 
manured 
(2 plats). 
Sum- 
mer 
tilled 
(3 plats). 
Corn 
(14 
plats). 
Small 
grain 
(7 plats). 
Sor- 
ghum 
(lplat). 
Yields of grain: 
1912.. bush... 
1913... do.... 
1914... do.... 
10.8 
8.7 
9.3 
14.1 
11.0 
9.4 
19.1 
11.8 
11.1 
15.0 
7.2 
6.0 
12.3 
6.3 
9.5 
13.4 
13.6 
12.8 
27.8 
18.1 
13.8 
18.6 
11.4 
10.9 
9.9 
8.3 
8.6 
18.7 
11.2 
9.0 
Average 
9.6 
11.5 
14.0 
9.4 
9.4 
13.3 
19.9 
13.6 
8.9 
13.0 
Crop value, cost 
of production, 
etc.: 
$6.72 
6.56 
$8.05 
6.09 
S9.80 
4.75 
S6.58 
5.55 
S6.58 
7.17 
S9.31 
14.61 
S13. 93 
11.50 
Cost.. 
| 
.16 
1.96 
5.05 
1.03 
- .59 
- 5.30 
2.43 
1 
1 
Having next to the highest yield and the lowest cost of preparation, 
disked corn ground shows the greatest profit, $5.05 per acre. Other 
methods that show profits are spring plowing, summer tillage, listing, 
and fall plowing. Subsoiling and green manure show losses. 
NORTH PLATTE FIELD STATION. 
The work here presented was conducted on the table-land of the 
Xorth Platte, Nebr., station. The soil is of the type generally known 
as loess. With the exception of the humus accumulated near the 
surface it is practically uniform to great depths. The storage and use 
of water is not limited by the depth of soil or any peculiarities in it. 
The development of roots is limited only by the physiological character 
of the crops grown and the available moisture. It is a soil on which 
maximum results from tillage methods would be expected. 
