40 ~ BULLETIN 297, U. S. DEPARTMENT OF AGRICULTURE. 
TaBLeE XXII.— Yields of flax and weight of seed per bushel in a date-of-seeding test on the 
Belle Fourche Experiment Farm in 1912 and 1918. 
Yield. Weight 
of seed 
Date of seeding. : per 
Grain. Straw. | bushel. 
1912. Bushels. | Pounds. | Pounds. 
1s! 2 hy eee a ee eee ee eRe AR snc a Levee PANEL alee So UN i oem aisles meals aoe 8.3 , 020 55.0 
AE tra (ee) eee ey reas aioe ey ok Abe Se As Oe a ee Bee he a a aM 10.6 1,860 54.3 
1913 
a ei eae eae eee earls er eae tee ee Sm Re ae me oa SC aOS TU 1,110 54.8 
Day DB sca ect aI se et Len ioe gis crea gga gna 4.8 830 55.0 
A DH GY=h! eaeet Mie Me een men Ur clee Lon arn OM Ane ry a ay InP cea a RO a Rak a eas. Maes Bis (0) 530 53.7 
SUMMARY. 
The experiments here reported were conducted on unirrigated land 
on the Belle Fourche Reclamation Project at Newell, S. Dak., from 
1908 to 1913. 
The results obtained at Newell are believed to be applicable in 
general to western South Dakota, northeastern Wyoming, and south- 
eastern Montana. 
The experiments were conducted on a heavy, impervious clay soil 
known as Pierre clay. This soil is quite typical of the locality. 
The average precipitation during the six years was 13.41 inches. 
The average precipitation during the growing season for small grains, 
March to July, inclusive, was 7.76 inches. The minimum precipita- 
tion for the growing season and for the year was recorded in 1911. 
On the average, satisfactory yields were obtained from winter 
wheat and fairly good yields from spring wheat. The returns from 
spring oats, barley, and emmer and from winter rye and emmer have 
not been sufficient to make these crops profitable. Total or almost 
total failures of all crops were recorded in 1911 and 1912. 
The best average yields of sprmg wheat have been obtained from 
the durum varieties, Kubanka and Arnautka. Of the spring common 
wheats, the best variety to grow appears to be the Power Fite. 
The best rate of seeding for durum wheat is from 4 to 5 pecks to the 
acre and for spring common wheat from 3 to 4 pecks. 
The best varieties of winter wheat for western South Dakota are 
the Kharkof, Turkey, and Crimean. These are very simular varieties, 
which differ only slightly in value. 
Experiments to determine the best date of seeding for winter wheat 
have failed to show any definite results. In general, the date of 
seeding must be determmed by the seasonal conditions. Medium 
early seeding is to be preferred if there is sufficient moisture to insure 
germination. 
It is much better to grow winter wheat than spring wheat in the 
Belle Fourche section. The average yield of Kharkof winter wheat 
its 
