... Russian olive 
NORTHERN GREAT PLAINS FIELD STATION, 1913-1922 
13 
North Dakota, 367, or 24 per cent; South Dakota, 211, or 14 per 
cent; and Wyoming, 67, or 5 per cent. 
The kinds of trees used each year have varied. Species that. have 
proved to be not adapted have been discarded, and new species have 
been added from time to 
time. 
—_——- — . __ 
Se 
oe 
SO te SERRE 
——_———= 
Table 10 gives the number of trees 
of each species that has been planted to date. 
——_— = = 
—eoee ee = 
ee = i 
Fic. 3——Outline map of the northern Great Plains region. 
cooperative shelter belts have been planted 
The dots indicate townships in which 
TaBLeE 10.—Planting stock of trees used in demonstration plantings in the northern 
section of the Great Plains, 1916-1922, inclusive 
Species and variety 
» 
Size 
Poplar: 
Norway and Carolina 
Willow: 
Laurel and Russian golden 
D 
PINE Ga) ole Sa a eee ee 
lm: 
Dwarf Asiatic 
White 
Tatarian maple 
Buffalo berry 
Chokecherry 
C 
E 
Spruce: 
Colorado blue 
White 
9-inch cuttings 
1-year rooted cuttings 
9-inch cuttings 
1-year rooted cuttings 
1-year seedlings 
| 2-year seedlings 
|e do 
1-year seedlings 
2-year seedlings 
| l-year seedlings 
2-year seedlings 
1-year seedlings 
SSS ee 
Total 
number 
of trees 
49, 233 
199, 487 
232, 019 
| 448, 322 
138, 289 
| 185, 085 | 
50, 183 | 
| 305, 913 | 
Years used 
1916. 
1916 and 1917. 
1920 to 1922, inclusive. 
1916 and 1917. 
1916 to 1919, inclusive. 
1916 to 1922, inclusive. 
Do. 
Do. 
1918 and 1919. 
1917 and 1922. 
1920 and 1922. 
| 1920 to 1922, inclusive. 
1921 and 1922. 
1922. 
Do. 
1919, 1920, and 1922. 
| 1919 to 1921, inclusve. 
1919 to 1922, inclusive. 
1920 and 1922. 
1921 and 1922. 
Do. 
