SPRING WHEAT IN" THE GREAT PLAINS AREA. 37 
GENERAL DISCUSSION OF RESULTS. 
Iii the preceding pages data have been presented and briefly dis- 
cussed separately for each station without reference to results at 
other stations. In the following pages some of the more important 
bearings and indications arc considered from a more general stand- 
point. 
To facilitate this study, Table XIX has been compiled, in which 
are brought together for each station the average yields as grouped 
for this study under different methods of preparation. The figures 
here given are taken from the last column of the tables as given for 
each station. The yield and cost of production data are also 
assembled in such a way as to show the profit or loss in dollars and 
cents per acre for the average crop for each method for which it has 
been computed at each station. 
Table XIX. — Comparison of the average yields and profit or loss on the production of 
spring ivheat, by different methods of tillage at 14 stations in the Great Plains area. 
Number 
of years 
averaged. 
Methods of tillage. 
Statement of data. 
FaU 
plowed. 
Spring 
plowed. 
Listed. 
Sub- 
soiled. 
Disked. 
Green 
manured. 
Summer 
tilled. 
1 
2 
3 
4 
5 
6 
7 
8 
9 
Yields per acre (bush- 
els): i 
Judith Basin 
Huntlev 
5 
2 
5 
6 
8 
3 
6 
3 
8 
6 
6 
5 
4 
6 
. 22.1 
20.0 
15.3 
20.1 
15.3 
13.4 
7.0 
9.6 
11.6 
9.4 
6.6 
4.1 
2.2 
6.2 
21.7 
19.5 
15.9 
19.8 
15.5 
13.7 
6.5 
11.5 
10.6 
12.3 
4.8 
3.1 
1.9 
6.1 
21.7 
18.0 
22.8 
16.0 
22.5 
22.4 
16.2 
23.3 
17.7 
15.7 
8.8 
14.0 
10.4 
11.2 
7.0 
4.6 
1.8 
6.6 
20.4 
22.3 
18.6 
22.2 
16.7 
14.6 
9.2 
13.3 
20.8 
25.9 
Williston 
20.2 
27.5 
17.9 
Hettinger 
Belle Fourche 
Scottsbluff 
North Platte 
20.4 
7.5 
9.4 
6.7 
9.4 
11.5 
19.9 
16.8 
8.6 
6.7 
5.1 
5.4 
7.4 
7.4 
6.4 
4.2 
9.9 
14.6 
Hays 
8.0 
Garden City 
Dalhart.. 
3.7 
.3 
8.6 
6.0 
5.8 
Amarillo 
8.1 
12.6 
11.6 
11.6 
10.0 
10.1 
13.0 
13.3 
16.2 
5 
2 
5 
6 
8 
3 
6 
3 
8 
6 
5 
4 
6 
6 
Profit or loss ( — ) per 
acre: 
Judith Basin 
Huntley 
$8.91 
7.44 
4.15 
7.51 
4.15 
2.82 
-1.66 
.16 
1.56 
.02 
-1.94 
-3.69 
-5.02 
-2.22 
$9.10 
7.56 
5.04 
7.77 
4.76 
3.50 
-1.54 
1.96 
1.33 
2.52 
-2. 73 
-3.90 
-4.76 
-1.82 
$9.64 
7.05 
$8.79 
4.03 
$11.00 
10.93 
6.59 
11.56 
7.64 
6.24 
1.41 
5.05 
2.53 
3.09 
.15 
-1.53 
-3.49 
- .13 
-$0.33 
1.00 
- 1.59 
.93 
- 2.92 
- 4.39 
- 7.17 
- 5.30 
$3.06 
6.63 
Williston 
2.64 
7.75 
Edgelev . 
1.03 
Hettinger. .. 
2.78 
Belle Fourche 
Scottsbluff 
North Platte.. 
- .30 
1.03 
-2.48 
- .59 
-3.45 
2.43 
.26 
Akron 
.47 
- .86 
-1.98 
-1.77 
- .37 
-1.99 
-2. 69 - 
-4.23 
- 7.68 
—1.28 
Hays 
—5.90 
Garden Cit v 
Dalhart... 
-12.02 
-14.40 
- 8.59 
-7.30 
—7.44 
-1.50 
—2.68 
1 The averages of columns 3, 4, 7, and 9 are strictly comparable with each other; columns 5 and 6 approxi- 
mately so; column 8 is not comparable with any other. 
