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. 



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 



Great Plains (semiarid) area: 



Amarillo, Tex 



Hays, Kans 



Akron, Colo 



North Platte, Nebr 



Archer, Wyo.& 



Highmore, S . Dak 



Eureka, S. Dak 



Alti- 

 tude. 



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 



Edgeley, N. Dak I 1, 468 



Langdon, N. Dak I 1, 615 



Dickinson, N. Dak ! 2, 453 



1, 875 

 4,228 

 1,176 

 1,924 



Williston, N. Dak. 



Moccasin, Mont 



Brandon, Manitoba 



Indian Head, Saskatchewan . 



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 



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. 



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 



