20 



BULLETIN 1113, U. S, DEPARTMENT OF AGRICULTURE. 



the Forest Service nursery, Halsey, Xebr., and grown for one year at 

 Mandan, N. Dak.', were sent out to 23 selected farmers. These plant- 

 ings were almost total failures on account of the very dry soil condi- 

 tion at the time they were set out. 



In 1920, shipments to cooperators totaled 124,183 trees. The dis- 

 tribution of the shipments by species and States is given in Table 5. 



The year 1920 was one of drought over nearly the entire terri- 

 tory, making the fourth year in succession in which the rainfall 

 was below normal. Tartarian maple and buffalo berry were used 



-Table 6. — Summary of Tables 3 to 5, inchtsive, shotving the total number of 

 trees of all species shipped to cooperators in each, State for each year of the 

 5-year period from 1916 to 1920, inclusive. 



state. 



1916 



1917 



1918 



1919 



1920 



Total. 





451,554 

 131,803 

 83,923 

 34,631 



226,870 

 84,559 

 31, 931 

 14,340 



84,516 

 30,688 

 20, 240 



6,858 



79,906 



62, 146 



16,651 



3,859 



67, 463 



29,264 



20,071 



7,385 



910,309 

 338 460 



North Dakota . 





172,816 

 67, 073 









Total 



701, 911 



357, 700 



142, 302 



162,566 



124, 183 



1, 488, 658 







for the first 'time in a few places. Coniferous plantings were again 

 almost total failures, on account of dry soil conditions. It is prob- 

 able that this type of tree can only be established in years of favor- 

 able rainfall. 



Northwest poplar, w^hich had grown successfully in test plant- 

 ings at Mandan for four years, was sent out for the first time 

 to a few selected cooperators. 



Table 7. — Number of cooperative shelter belts planted each year, the number 

 of each year's plantings listed as successful or as having failed on Janu- 

 ary 1, 1921, and the percentage of failures. 



Year. 



Number 

 planted. 



Nimiber 

 success- 

 ful on 

 Jan. 1, 

 1921. 



Nimiber 



that had 



failed by 



Jan. 1, 



1921. 



Percent- 

 age of 

 failures. 



1916 



633 

 232 



75 

 202 



92 



319 

 117 

 37 

 154 



89 



314 

 115 

 38 

 48 

 3 



49.6 



1917 



49.5 



1918 ■ " 



50.6 



1919 



23.7 



1920 



3.3 







Total 



1,234 



716 



518 



42.0 







In Table 6 the shipments of trees to cooperators during the 5- 

 year period from 1916 to 1920, inclusive, are summarized to show 

 the number shipped to each State each year, the total shipment- 

 each year, and the total number sent to each State in the five years. 

 In the five years, 910,309 trees were shipped to Montana, 338,460 to 

 North Dakota, 172,816 to South Dakota, and 67,073 to Wyoming. 

 The total number of trees in shipments to the four States in the five 

 years was 1,488,658. 



