30 
BULLETIN *0O, U. S. DEPAET^IEXT OE AGEICULTUEE. 
upper part of tlie Snake River 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. 
Precipitatf 
:n inches . 
Station. 
Arr 
oral. 
Seasonal - 
1913 
1914 
1915 
Aver- 
age. 
:.-:? :?:4 -.■ 
Aver- 
- : ^-^:. Utah 
Aberdeen. Idaho 
Bums. Oreg 
Moro. Oreg 
4". 400 
4.::>; 
1 I 
51 
"12.17" 
14.40 
11.32 
13.63 
14.01 
r. n 
5.85 
4.20 
-L2> 
3.56 
5.54 
3.91 
3.06 
1.64 
14.43 
5.70 
-:. v 
3.67 
4.50 

1 The record for seas ma] rrT:-r::a:ion includes the months of April. May. June, and July at Aberdeen 
and Moro. At Xephi the record is for the three months. April, May, and June, and at Burns for the fire 
months. April, May, June. . uly, and August. At I avis the r^: ::i is for sis months, January to June, 
inclusive. 
EESTLTS AT XEPHI. UTAH, 
At the Xephi 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 XXI. The average yield of 
the leading variety in each of the three groups is shown graphically 
in figure 7 . 
Table XXI. — Annual arid average yields of the Marquis and three other varieties of wheat 
groicn at the Xephi 'station during 1914 and 1915. 
[Data obtained in cooperation with the Utah Agricultural Experiment Station.] 
Group and variety. 
Yield per acre (bushels). 
C I. 
No. 
A V er- 
ase. 
Fife: 
Marauis 41 
Ghirka Spring 1517 
Crimean -vir;: 
7 nrkey . 5 
Crimean 143. 
Donnn: 
Adjini 1594 
Eubanka 1440 
Yield in 1914 from a single row 121 feet long. 
12.4 
11.2 
43.0 
40.3 
19.0 
1.5.7 
16.3 
19.0 
32.6 
29.9 
15.3 
IS. 2 
14.4 
15.1 
35.1 
17.2 
17.0 
