38 BULLETIN 430, U. S. DEPARTMENT OF AGRICULTURE. 
Corn appears to be a very uncertain crop for grain at high elevations - . 
in eastern Wyoming, according to the three years’ results obtamed ~ 
at Archer. It is probably the best crop to grow for silage or roughage, 
however. 
BUCK WHEAT. 
Buckwheat has been grown on the Cheyenne Experiment Farm in © 
each of the three years. Two varieties have been tested, the Tar- ~ 
tarian and the Mountain. Neither of these varieties appears to be — 
adapted to conditions such as prevail at Archer. Buckwheat is © 
unable to withstand drought, and hence all yields obtamed have been ~ 
low, except in 1915, a season of high rainfall. The Tartarian is © 
about two weeks earlier than the Mountain variety. The yields in © 
the three years (1913 to 1915) are as follows: Tartarian, 1, 1.3, and 8 
bushels per acre; Mountain, 5, 3.5, and 16 bushels per acre, re- 
spectively. Buckwheat should apparently be grown in eastern — 
Wyoming only in an experimental way. 
SUMMARY. 
The Cheyenne Experiment Farm is located on the plains of south- 
eastern Wyoming at Archer, 8 miles east of Cheyenne. The eleva- 
tion is almost exactly 6,000 feet. The station was established in — 
July, 1912, and experimental work was begun in the fall of that — 
year. The experiments reported herein, therefore, have continued 
three years. 
The soil and climate are fairly typical of those of the district lying — 
to the eastward. The results obtained are applicable to southeastern 
Wyoming and to adjacent small portions of Colorado, Nebraska, and — 
South Dakota. 
The soil is a light sandy loam, very productive when sufficient 
moisture is available. Heavier soils occur to some extent in other 
parts of the district. 
The average annual precipitation at Cheyenne during the past 
16 years has been 15.78 inches. The average seasonal precipitation — 
(April to July, inclusive) during the same period has been 8.59 
inches. 
The evaporation from a free water surface during the growing © 
season (April to July, inclusive) has been about 22.5 inches. The 
summers are rather short, without excessive heat. Hot winds do — 
not occur. The average frost-free period is 125 days. 
Experiments with wheat show that winter-wheat varieties have 
yielded higher than spring wheats In two years out of the three 
during which experiments have been conducted. The Ghirka Winter 
and Kharkof have been the highest yielding varieties. 
Rate-of-seeding experiments with the Ghirka Winter and Turkey 
have given contradictory results during the three years. Four pecks 
ani w Praia 
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