EXPERIMENTS WITH DURUM WHEAT. 
15 
The locations of the stations, together with their altitude above 
sea level, are shown in Table II. The normal or average rainfall, 
in inches, with the number of years on which such average is based, 
also is given. The United States Weather Bureau establishes 
normals for their independent stations on 33-year records. At all 
other points the rainfall recorded is the average for the years during 
which observations have been made. Finally, the table shows the 
general soil type on which each station is located. 
Table II. — Altitude, normal and average precipitation, and soil type at 30 experiment 
stations at which experiments with durum wheat have been conducted. 
Area and station. 
Alti- 
tude. 
Precipitation. 
Normal 
or 
Length 
of 
aver- 
record. 
age. 
Inches. 
Years. 
31.22 
26 
32.59 
56 
27.51 
33 
32.64 
40 
20.51 
27 
28.43 
16 
28.68 
33 
21.76 
26 
24.92 
33 
21.21 
24 
23.16 
48 
19.72 
11 
18.86 
33 
14.23 
33 
16.75 
22 
16.43 
7 
14.06 
8 
18.05 
15 
17.88 
4 
15.70 
24 
14.90 
33 
16.66 
18 
12.95 
9 
19.44 
10 
13.48 
17 
9.46 
4 
11.74 
12 
11.35 
11 
23.59 
45 
10.52 
44 
Type of soil. 
Prairie (subhumid) area: 
McPherson,Kans 
Manhattan, Kans... 
Lincoln, Nebr 
Ames, Iowa 
Brookings, S. Dak. . 
Ashland, Wis 
St. Paul, Minn 
Crookston, Minn 
Fargo, N. Dak.a. 
Pla 
Feet. 
1,495 
1,014 
1,189 
922 
1,636 
615 
837 
863 
935 
3,676 
2,000 
4,560 
3,000 
6,027 
1,890 
1,884 
Newell, S. Dak 2,900 
1,468 
1,615 
2, 453 
1,875 
Great Plains (semiarid) area: 
Amarillo, Tex 
Hays, Kans 
Akron, Colo 
North Platte, Nebr 
Archer, Wyo.b 
Highmore, S. Dak 
Eureka, S. Dak 
Edgeley, N. Dak 
Langdon, N. Dak 
Dickinson, N. Dak 
Williston, N. Dak , 
Moccasin, Mont 4, 228 
Brandon, Manitoba 1, 176 
Indian Head, Saskatchewan 1, 924 
Western basin and coast (arid) area: 
Nephi, Utah 
Aberdeen, Idaho 
Burns, Oreg 
Moro, Oreg 
Chico,Cal 
Modesto, Cal 
6,000 
4,400 
4,100 
1,800 
189 
90 
Deep sandy loam. 
Dark-brown silt loam. 
Alluvial clay loam. 
Black silt loam. 
Glacial sandy loam. 
Red clay. 
Light clay loam. 
Heavy clay loam. 
Heavy black clay loam. 
Chocolate clay loam. 
Silty clay loam. 
Sandy loam. 
Loess. 
Medium sandy loam with some gravel. 
Glacial clay loam. 
Glacial sandy loam, stony portion of 
old moraine. 
Clay (gumbo), shale subsoil. 
Light sandy loam, shale subsoil. 
Black clay loam. 
Sandy loam to clay loam. 
Fine sandy loam. 
Dark clay loam, gravelly subsoil. 
Sandy loam. 
Light sandy to heavy loam, with clay 
subsoil. 
Sandy clay loam. 
Lava ash (sandy clay loam). 
Silt loam to a very fine sandy loam. 
Silt loam. 
Sandy loam. 
Do. 
a Observations made at Moorhead, Minn. 
b Observations made at Cheyenne, Wyo. 
The stations listed in Table II are grouped in the three geographic 
divisions named. It will be noted that there is no sharp line of 
demarcation between the different divisions, either in rainfall, eleva- 
tion, or soil type. For example, Amarillo, Tex., and Hays, Kans., 
located in the semiarid area, have a higher annual rainfall than Brook- 
ings, S. Dak., which is considered in the subhumid area. Not only is 
the rainfall at Amarillo higher than that of Brookings, but it is also 
higher than that of Crookston, Minn., and is slightly below that of 
