12 BULLETIN 595, U. S. DEPARTMENT OF AGRICULTURE. 
The highest profit, $9.89 per acre, was obtained from disked corn 
oround. The value of this method as a farm practice will depend 
upon the profitable growth and utilization of the corn crop. Of the 
continuous-cropping methods, listing (on account of its Imexpensive- 
ness) has produced the next highest profit, which is $2.88 per acre 
less than the profit on disked corn ground. 
Table V shows the profit from summer tillage to be next to that 
on disked corn ground. Im the case of summer tillage and green 
manuring, however, the fact must be taken into account that a profit 
is secured only once in two years on the same ground. Green 
manuring, being even more expensive and less productive than 
summer tillage, has been the least profitable method. No difference 
is to be noted between peas and winter rye for green manure. 
HUNTLEY FIELD STATION. 
The field station at Huntley, Mont., is located in the valley of the 
Yellowstone River, just below the first bench. The soil is a heavy 
gumbo to a depth of about 8 feet. Underlying the soil is a con- 
siderable depth of freely drained gravel. This soil carries a large 
supply of available water and allows deep feeding of the crop; 
consequently, it is possible to store in it a maximum quantity of water 
that can be recovered by the crop. 
The Huntley station presents for study three years’ results from 
some methods and four years’ results from others. 
As judged by average yields (Table VI), the methods practiced 
divide sharply into four groups, the production of the best method 
being more than double that of the poorest. These groups are summer 
tillage, with an average yield of 39.4 bushels; green manure, 30.6 
bushels; disked corn ground, 25.8 bushels; and the various methods 
of preparing land continuously cropped to winter wheat, with aver- 
ages ranging from 17.2 to 19 bushels per acre. The differences 
within this latter group are too small to be decisive, particularly as 
they are not consistent from year to year. As between peas and 
winter rye for green manure the advantage at this station is decidedly 
in favor of peas. In only one of the four years for which compari- 
son is afforded has the yield following rye as green manure exceeded 
that following peas. The average yield after peas has been 5.2 
bushels per acre greater than that after rye. 
As judged by relative profits per acre, two methods—summer till- 
age, with an average profit of $16.94 per acre, and disked corn 
ground, with an average profit of $13.81 per acre—stand out as 
being distinctly superior to any of the other methods. The rela- 
tively high profit from summer tillage is due to the very high yield 
from that method, but the superiority of disked corn ground over 
the other methods, while due largely to high yields, may be attrib- 
