30 



BULLETIN 400, U. S. DEPAETMENT OF AGEICULTUEE. 



upper part of the Snake Kiver Basin. Most of the surface lies at 

 elevations of 4,000 to 5,000 feet. The Columbia Basin is much 

 lower, scarcely exceeding 2,000 feet, while the Sacramento Valley of 

 California reaches sea level at its lower end. Wind velocities are 

 rather low in most of these areas. The summers are warm and evap- 

 oration fairly high. The growing season is short at the higher ele- 

 vations. In the Harney Valley frosts occur during the summer 

 months. Here, as elsewhere, early varieties of spring wheat have 

 an advantage over midseason or late varieties. 



Table XX. — Altitude and annual and seasonal precipitation at five experiment stations 

 in the arid western basin and coast areas. 





Alti- 

 tude. 





Precipitati 



Dn (inches). 







Station. 



Annual. 



Seasonal, i 



■r 



1913 



1914 



1915 



Aver- 

 age. 



1913 



1914 



1915 



Aver- 

 age. 



Nephi, Utah 



Feet. 

 6,000 

 4,400 

 4,100 

 1,800 

 51 







"iziV 



14.40 

 9.86 

 8.50 



11.32 



13.63 



8.29 



6.82 



14.86 



21.02 



14.01 

 9.08 

 7.66 



12.78 



"'I'so' 



5.85 

 4.20 

 4.28 

 3.56 



5.54 

 3.91 

 3.06 

 3.64 

 14.43 



5.70 



Aberdeen, Idaho 



4.06 

 3.67 





4.50 





















1 The record for seasonal precipitation includes the months of April, May, June, and July at Aberdeen 

 and Moro. At Nephi the record is for the three months, April, May, and June, and at Bums for the five 

 months, April, May, June, July, and August. At Davis the record is for six months, January to Juno, 

 inclusive. 



RESULTS AT NEPHI, UTAH. 



At the Nephi substation the cooperative experiments have included 

 the Marquis variety for only two years, 1914 and 1915. The annual 

 and average yields are shown in Table XXL The average yield of 

 the leading variety in each of the three groups is shown graphically 

 in figure 7. 



Table XXI. — AnnvMl and average yields of the Marquis and three other varieties of wheat 

 grown at the Nephi ( Utah) substation during 1914 cmd 1915. 



[Data obtained in cooperation with the Utah Agricultural Experiment Station.] 



Group and variety. 



C. I. 



No. 



Yield per acre (bushels). 



Fife: 



Marquis 



Ghirka Spring 

 Crimean (winter): 



Turkey 



Crimean 



Durum: 



Adjini 



Kubanka 



3641 



1517 



1594 

 1440 



■ 12.4 

 11.2 



43.0 

 40.3 



19.0 

 15.7 



16.3 

 19.0 



32.6 

 29.9 



15.3 

 18.2 



14.4 

 15.1 



37.8 

 35.1 



17.2 

 17.0 



a Yield in 1914 from a single row 121 feet long. 



