SHELTEK-BELT DEMONSTRATIOlSrS ON" THE GREAT PLAINS. 13 



It can not be recommended for general planting in this section. It 

 seems, however, to be well adapted for planting on the prairies in the 

 eastern part of the Dakotas and in western Minnesota. 



Russian golden willow. — The Russian golden willow {Salix vitel- 

 lina)^ like the laurel-leaf willow, has been extensively propagated 

 by commercial nurseries for planting in the Northwest. It was im- 

 ported a number of years ago from Russia. It has been extensively 

 tested throughout the Great Plains area and has killed out over 

 large areas after one or two years, the same as the laurel-leaf willow. 

 It can not be recommended for general planting in this section, but 

 it seems to do well on the prairies farther east. 



Honey locust. — The honey locust {Gleditsia triacanthos) is native 

 to southern Minnesota and South Dakota. It is hardy in a few iso- 

 lated sections of the northern Great Plains, but can not be recom- 

 mended for general planting. 



Fig. 7. — A .'.-year old planting of box elder, gi-een ash, and white elm in Ziebach County, 

 S. Dak. This illustration shows the trees filling the spaces between the rows which are 

 8 feet apart. 



Caragcma. — The caragana, or Siberian pea tree {Caragana ar- 

 horescens) , is an importation of some years back from Siberia. It is 

 especially hardy and drought resistant and is one of the best trees 

 for general shelter-belt planting in the northern Great Plains. It is 

 adapted to all types of soil except sand or gravel, but does not thrive 

 in low, wet situations. 



Russian olive. — The Russian olive {Elaeagnus angustifolia) is an 

 importation made some years ago from northern Russia. Like the 

 caragana, it is especially hardy and drought resistant and may be 

 classed with it as a valuable tree for shelter-belt planting in the 

 northern Great Plains area. It adapts itself to all types of soil, but 

 does not thrive in low, wet situations. 



Chinese elm. — The Chinese elm {Ulmjus pumila) was introduced 

 several years ago from northern China. It has not proved entirely 

 hardy in the northern portion of this region, where a tendency' is 

 3607°— 22 3 



