40 BULLETIiSr 398, U. S. DEPARTMENT OF AGEICULTUKE. 



SUMMARY. 



Cooperative experiments with cereals at the Judith Basin sub- 

 station, Moccasm, Mont., have been conducted during eight years, 

 1908 to 1915, inclusive. 



The Judith Basin substation is located in the west-central part 

 of Fergus County, in central Montana. The altitude is 4,300 feet. 



The yields obtained at Moccasin are not representative of all 

 the dry-land area, but the comparative results obtamed are believed 

 to be applicable in general to all the dry-farming area of Montana. 



The annual average precipitation at Moccasin for 18 years, 1898 to 

 1915, inclusive, is 16.66 inches. The average seasonal rainfall 

 (April to July, inclusive) for the same years is 9.41 inches. 



The soil at Moccasin on which the cereal varieties have been 

 tested is a dark clay loam of limestone origin. 



On the average, satisfactory yields are obtained from winter and 

 spring wheat,'spring oats, barley, and flax. 



The best winter wheats are the Kharkof and Turkey. These be- 

 long to the Crimean group of hard winter wheats. 



The best rate to sow winter wheat is 3 pecks per acre. The best 

 date to sow is from August 10 to September 10. 



The highest yields of spring wheats have been obtained from varie- 

 ties of durum wheat. Of these, the Pehssier has been the best. Of 

 the common spring wheats the best variety to grow appears to be the 

 Marquis. 



Spring wheats are seeded at the rate of 4 pecks per acre. 



The best results are obtained from sowing all spring wheat, oats, 

 and barley as early in the spring as soil and climatic conditions will 

 permit. 



The highest average yield of oats was obtained from the Sixty-Day 

 variety. This variety averaged about 16 bushels per acre more than 

 later maturing varieties. 



The best rate of seeding for the small-kerneled early varieties of 

 oats, such as the Sixty-Day, is about 4 pecks per acre. 



The White Smyrna barley, a 2-rowed bearded hulled variety, 

 has given the highest average yield. 



The hulled varieties of barley are seeded at the rate of 5 pecks and 

 the naked varieties at the rate of 4 pecks per acre. 



The highest yield of flax in a 5-year test was obtained from the 

 Russian variety. 



It is probable that the best results will be obtained if flax is sown 

 early, between April 15 and May 1. The best rate seems to be from 

 20 to 25 pounds per acre. 



In pounds per acre, the average yield of the Wliite Smyrna barley 

 is greater than that of the best variety of any of the other cereal 



