CEOP PRODUCTION IN THE GREAT PLAINS AREA. 13 
its increase of yield over fall plowing has lacked one-tenth of a bushel 
of being 10 bushels per acre. The greatest departure from this gen- 
eral average is at Scottsbluff , where the increase has amounted to 20 
bushels per acre. 
As values and cost of production are here figured, it is seen in Table 
IV that oats have been produced at a profit by at least one method 
at all stations except Garden City and Dalhart. At two stations, 
Judith Basin and Huntley, a profit has been realized from all methods. 
Comparatively good yields, combined with low cost of production, 
have usually made disked land, which has been chiefly corn ground, 
show the greatest profit at all stations where a profit has been realized 
from any method. 
At all stations where it has been tried, listing has either been more 
profitable or has resulted in less loss than fall plowing. 
Subsoiling has yielded a profit at two stations and a loss at six. 
It could not, however, be said that it was a profitable practice at any 
station, as the profits from it have been less and the losses from it 
greater than from fall plowing. It should be compared with fall 
plowing, as it is a modification of that method. 
At all the 10 stations north of Hays, except Belle Fourche and North 
Platte, where the losses per acre have been $0.44 and $0.29, respec- 
tively, spring plowing has been productive of profitable crops. At 
Hays the average loss from it is only $0.56 per acre. At Amarillo 
the loss has increased to $ 1 .3 1 . At Garden City and Dalhart there was 
a loss, but all methods resulted in a loss at these stations. 
At Akron and all North Dakota and Montana stations, fall plowing 
shows a profit. At Scottsbluff the nominal profits from spring 
plowing have been converted to nominal losses by fall plowing. At 
the other stations the losses from the two methods are about the 
same. 
The cost of green manuring has been so high that at only two 
stations, Judith Basin and Huntley, has it shown a profit. At 
those stations the profits were smaller than those from any other 
method. At all other stations it has either converted the profit of 
other methods into a loss, or has been productive of the greatest loss. 
In probably only two or three cases has the loss been small enough 
to make it possible to change it to a profit by distributing a part of 
the cost to following crops. 
Summer tillage as here figured shows a profit at six stations and a 
loss at eight. In two cases the profits are nominal — i. e., they are 
so small that changes in the average yields by extension of the record 
might change their position. In no case has the profit as here figured 
been as great as from some other method. Except at Dalhart and 
Garden City the losses at the eight stations showing a loss have 
averaged from $1.62 to $3.81. Considering the fact that summer 
