FORAGE CROPS IN NORTHERN GREAT PLAINS. 



Table 1. — Monthly, seasonal, and annual precipitation at Redfield, S. Dak. 

 during the years 1913 to 1922, inclusive, with averages for certain years. 



[Data in inches; T =trace: NR =no record.] 



Year. 



Jan. 



Feb. 



Mar. 



Apr. 



May. 



June. 



.July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



Sea- 

 sonal. 

 Apr. TotaL 



to [ 

 Sept. 



1913 



0.01 

 .30 

 .85 



1.15 



2.38 

 .17 





 .26 

 .03 

 .67 



0.55 

 .54 



1.89 

 .47 

 .80 

 .14 



1.16 

 .21 

 T 



3.65 



NR 

 0.29 



.99 

 1.16 

 2.25 

 1.15 



.97 

 2.14 



.85 

 2.04 



1.23 

 5.22 

 2.13 

 1.11 

 3.25 

 2.17 

 2.18 

 3.00 

 1.72 

 2. GO 



2.89 

 2.84 

 2.87 

 5.13 

 1.48 

 3.59 

 2.90 

 4. 35 

 1.61 

 4.44 



1.68 

 6.72 

 3.58 

 3.56 

 1.93 

 2.56 

 4.70 

 4.60 

 .19 

 2.67 



3.45 

 1.17 

 4.86 

 2.01 

 1.00 

 1.68 

 1.71 

 3.73 

 4.47 

 .80 



0.66 

 1.67 

 1.89 

 5.19 



.79 

 2.77 



.77 

 1.35 

 3.08 



.13 



0.62 



3.12 



2.02 



1.42 



1.97 



.46 



.44 



.99 



6.05 



.30 



0.39 

 1.00 

 1.82 



.55 

 



.20 

 2.77 



.80 

 1.64 



.40 



0.60 

 



.28 



T 

 



2.50 

 2.03 



.60 

 1.11 

 2.83 



0.02 

 .60 

 .58 



2.12 

 .08 



1.48 

 .30 

 T 



NR 

 .40 



10. 53 

 20.74 

 17.35 

 18.42 

 10.42 

 13.23 

 12.70 

 18.02 

 17.12 

 10.94 





1914 



1915 



1916 



1917 



1918 



1919 



23.47 

 23.76 

 23.87 

 15. 93 



18.87 

 19.93 



1920 



1921 



22.03 



1922 



20.93 



Average, 1 

 1914 to 

 1922 



All years, 2 

 1898 to 

 1922 



. .72 

 .46 



1.11 

 .67 



1.37 

 1.11 



2.71 

 1.97 



3.45 

 3.15 



3.79 

 3.27 



2.12 

 2.63 



1.82 

 2.83 



1.34 

 1.77 



.94 

 1.30 



1.03 

 .65 



.70 

 .52 



15.23 

 15. 62 



21.10 

 20.33 



1 The year 1921 is not included in computing the averages, as data are not complete. 



2 The years 1912, 1913, and 1921 have not been included in computing the averages, as data for these 

 years are incomplete. 



Table 2 gives the dates of the last frost in the spring and the first 

 in the fall at Redfield, S. Dak. June frosts are rare, only three being 

 reported during the past 25 years. The latest spring frost was 

 recorded on June 21 and the earliest autumn frost on September 9. 

 The shortest frost-free period reported is 83 days, in 1902, and the 

 longest 172 days, in 1922. The average for all years is 136 days. 



Table 2. — Dates of killing frost, the last in spring and first in fall, with frost-free 

 period at Redfield, S. Dak., in each year from 1898 to 1922, inclusive. 



[Data from the records of the United States Weather Bureau.] 



Year. 



Last in 

 spring. 



First in 

 fall. 



Frost- 

 free 

 period. 



Year. 



Last in 

 spring. 



First in 

 fall. 



Frost- 

 free 

 period. 



1898 



Apr. 25 

 May 13 

 May 3 

 June 7 

 June 21 

 June 11 

 May 14 

 May 13 

 May 9 

 May 27 

 May 8 

 May 16 

 May 12 

 May 4 



Sept. 10 

 Sept. 26 

 Sept. 27 

 Sept. 18 

 Sept. 12 

 Sept. 17 

 Sept, 21 

 Oct. 11 

 Oct. 9 

 Sept. 28 

 Sent. 27 

 Oct. 12 

 Sept. 9 

 Oct. 4 



Days. 

 138 

 136 

 147 

 103 

 83 

 98 

 130 

 151 

 153 

 124 

 142 

 149 

 120 

 153 



1912 



May 16 

 May 

 May 14 

 May 19 

 Mav 3 

 May 2 

 Mav 13 

 May 9 

 Apr. 28 

 Mav 15 

 Apr. 19 



Sept. 25 

 Sept. 21 

 Oct. 14 

 Oct. 5 

 Sept. 15 

 Oct. 5 

 Sept. 16 

 Sept. 25 

 Sept. 30 

 ...do.... 

 Oct. 8 



Days. 

 132 



1899 . 



1913 



138 



1900 



1914 



153 



1901 



1915 



139 



1902 



1916 



135 



1903 



1917 



156 



1904 



1918 



126 



1905' 



1919 , 



1920 



139 



1906 





1907 



1921 



138 



1908 



1922 



172 





Average 





1910 



May 14 



Sept. 27 



136 



1911 











The mean seasonal temperature for all years at Redfield was 61.4° 

 F. The averages for the various months during the growing season 

 for the years 1899 to 1922, inclusive, were as follows: April, 44.7°; 

 May, 56.2°; June, 66.2°; July, 71.5°; August, 69.8°; and September, 

 60° F. July has the highest average and also holds the record for the 

 maximum temperature of 110° F. in 1919. The lowest temperature 

 recorded is —44° F. in January, 1912. 





