EXPERIMENTS WITH KHERSON AND SIXTY-DAY OATS. 



37 



Newell, Cottonwood, Eureka, and Ilighmore, S. Dak.; North Platte, 

 Nebr. ; Archer, Wye; and Akron, Colo. 



The climate of this section is generally seniiarid. It is charac- 

 terized by low precipitation and high summer temperatures. Table 

 XXV shows the altitude, the normal annual and seasonal precipita- 

 tion, the mean temperatures for June, July, and August, and the gen- 

 eral soil type at each of the 13 stations included in the section under 

 consideration. 



Table XXV. — Altitude, average annual and seasonal precipitation, mean seasonal 

 temperatures, and general soil types at 13 experiment stations in the northern Great 

 Plains area. 



[Tho circled figures in columns 6, 7, and 8 indicate the number of years during which the data were recorded 

 when such period was less than the number of years indicated in column 3.] 





Alti- 

 tude. 



Climatological data. 





Station. 



Length 



of 

 record. 



Average pre- 

 cipitation. 



Mean temperature 

 (■•T.). 



General soil type. 





An- 

 nual. 



Sea- 

 sonal.i 



June. 



July. 



Au- 

 gust. 





1 



2 



3 



4 



5 



6 



7 



8 



9 





Feet. 

 4,228 

 1,875 

 2,543 



1,750 

 1,615 



1,468 

 2,950 

 2,414 

 1,884 

 1, 890 

 2,826 

 6,027 



4. 500 



Years. 

 19 

 33 

 25 



2 34 



311 



■117 



9 



7 



7 



22 



35 



6S9 



13 



Inches. 

 16. S2 

 14.90 

 15.85 



17.50 

 16. 83 

 20.25 

 13.98 

 16.54 

 16.43 

 16.75 

 18.74 

 13.80 



19.13 



Inches. 

 10.94 

 10.43 

 11.19 



11.71 

 11.09 

 13.82 

 8.68 

 9.04 

 8.71 

 10.66 

 11.14 

 7.92 



11.90 



(D5S. 

 ®63.0 

 ©61.0 



63.4 



®63.0 

 (g)6S.6 

 ©68.1 



69.3 



®63.0 

 ®66.8 

 ©67. 2 



67.6 



Dark clav loam 



AVilUston, N. Dak 



Dickinson, N. Dak 



Mandan, N. Dak 



Langdori, N. Dak 



Fine sandy loam. 

 Clay loam to fine sandy 



loam. 

 Sandy loam. 

 Black clay loam. 



Edgeley, N. Dak 



Newell, vS Dak... 









Light sandy loam. 

 Sticky day (Pierre). 

 D'o. 



65.0 



72.0 



69.6 



Cottonwood, S. Dak. 



Eureka, S. Dak . . . 











Highmore, S. Dak 



North Platte, Nebr 



Archer, Wyo 



67.7 



@68.0 



61.0 



®65.0 



72.9 



@72. 2 

 67.0 



®71.0 



71.4 



@72.1 



65.9 



®69.0 



Glaciated clay loam. 



Loess. 



Medium sandy loam 



Akron, Colo. 



with some gravel. 

 Sandy loam. 





1 For months of March to July, inclusive, at Akron, Colo., and Newell, S. Dak.; April to July, inclusive, 

 at Archer, AVyo., and North Platte, Nebr., and April to August, inclusive, at Mandan, Iildgeley, Dickinson, 

 Williston, and Langdon, N. Dak., Cottonwood, Eureka, and Highmore, S. Dak., and Moccasin, Mont. 



2 Data recorded at Bismarck, N. Dak., abotit 4 miles cast of ]\tandan; altitude at Bismarck, 1,674 feet. 



3 Data recorded at AVoodbridge, about 24 miles northwest of Langdon. 



* Data recorded at Berlin, about 12 miles east of Edgeley; altitude at Berlin, 1,470 feet. 



6 Data recorded at Cheyenne, Wyo., 8 miles west of Archer; altitude at Cheyenne, 6,088 feet. 



As shown in Table XXV there is much variation in the altitude at the 

 different stations. Edgeley, N. Dak., is the lowest, with an elevation 

 of 1,468 feet, and Archer, Wyo., the highest, with an elevation of 

 6,027 feet above sea level. 



The average annual precipitation does not exceed 21 inches at any 

 of these stations. Archer, Wyo., has the lowest precipitation, 13.80 

 inches. At all stations more than half the precipitation occurs during 

 the late spring and summer months, or during the growing season, 

 when it is most needed by the oat plant. 



