c 



Growing Forest Trees in Western Nebraska 



with little snow, there are occasionally heavy snowstorms ac- 

 companied by high wind and low temperature. The tempera 

 ture at midday in the summer occasionally runs very high, but 

 the high temperature lasts for only a few hours. The nights are 

 invariably cool. The maximum temperature for North Platte 

 for thirty-eight years, from 1875 to 1912, was 107 F. and the 

 minimum 35 F. The average date of the last killing frost in 



Fig. 3. Carolina Poplar (on the right) planted in 1909. Box Elder (on 

 the left) planted in 1908. Photo October, 1912. 



spring is May 1, and the average date of the first killing frost 

 in autumn is September 29. 



The average annual precipitation from 1875 to 1912 has 

 been 18. (50 inches. The average for the months of May, June, 

 July, and August has been 13.55, or 72 per cent of the total for 

 the year. The precipitation during the years affecting the trees 

 growing on the Substation farm has been as follows: 



