WINTER-WHEAT PRODUCTION AT FORT HAYS STATION. 17 
Corn has averaged 6.3 bushels per acre, and wheat 15 bushels. This 
is about the average for corn and the same for wheat as the average 
of wheat on disked corn ground in the green-manure rotations. 
Rotation No. 142 is the same as rotation No. 141, with alfalfa in 
place of brome-grass. The alfalfa is sown without a nurse crop in 
the first of the three years of alfalfa. Previous to 1913 not much 
success attended efforts to obtain a stand of alfalfa. Since that 
time there has always been a sod to break up, and generally there has 
been some hay production. The yield of oats has averaged 17.9 
bushels per acre, which is less than in rotation No. 141 or from most 
methods by which oats have been raised. Corn has averaged 5 
bushels per acre, which is next to the lowest yield of corn in this 
eroup. The average yield of wheat is 12.2 bushels, which is the low- 
est of any method except that of late plowing of wheat stubble. 
These plats show clearly that the introduction of sod crops into the 
rotation will not increase yields, but has, on the contrary, the opposite 
effect to a degree largely dependent upon the success of the sod crop 
itself. 
Diligent study has been made of the data from this block of plats 
to determine whether the averages for the entire period of experi- 
mentation afforded a correct basis from which to draw conclusions of 
the relative merits of the different methods and systems of cropping 
or whether some were having a cumulative effect in increasing or 
decreasing yields. The yield curves have been smoothed in various 
ways and the yields have been averaged for different periods and 
groups of years. Such studies have failed to reveal any changing 
relations in the yields of the different methods and rotations. 
The evidence from the rotations in this block does not indicate 
that the farmers are wrong in devoting the large proportion that they 
do of the cropped acreage to winter wheat. Neither does it indicate 
that wheat grown followmg other crops yields more per acre than 
wheat following wheat, provided the stubble is plowed or otherwise 
cultivated soon after harvest so as to get the benefit of a fallow dur- 
ing the summer season between harvest and seeding. 
METHODS OF FALLOW. 
In presenting and considering in the foregoing pages the results on 
fallow, the method of fallow was not described. The method em- 
ployed on those plats was what may be designated as the most inten- 
sive. Cultivation begins with early plowing after harvest. The 
ground is packed or worked down immediately after plowing and given 
during the summer and fall the cultivation necessary to prevent the 
erowth of vegetation. The cultivation is in fact the same as early 
plowing to be sown to wheat. In the spring cultivation is continued. 
The ground is replowed in June and cultivation continued through 
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