BUKLETIX 1337, V. S. DEPAETMEXT OF AGEICULTiniE 
Table 2. — Number of shelter-belt demonstrations in active cooperation in 1923, by 
the States and years in which they were planted 
Number in each State 
Year 
Montana ^^-^ 
1 
South 
Dakota 
Wyoming 
Total 
1916 
162 
54 
15 
49 
35 
48 
73 
80 
68 
28 
3 
41 
20 
25 
42 
73 
44 
18 
12 
8 
3 

282 
1917 
103 
1918- - 
S2 
1919 
18 T 
109 
1920 ... 
11 
11 
47 
50 
6 
3 
14 
21 
72 
1921 
87 
1922 
176 
1923 
224 
Total 
516 3nn i 911 
58 
1,08& 
On the same date 106 applications for plantings in 1925 were on 
file. The numbers from each State were: Montana, 32; North 
Dakota, 34; South Dakota, 35; and Wyoming, 5.^ 
A total of 742 established shelter belts and sites for which apphca- 
tions for plantings had been made was inspected in 1923. This 
involved 16,248 miles of travel, 143 days' work, and an expense of 
$1,126.31. The cost was S7.88 a day, $1.52 an inspection, and 6.93 
cents a mile. The exj)ense as given includes subsistence of the in- 
spectors, but does not include their salaries, which at $3.33 per day 
amounted to $476.19. 
In view of the present crowded appearance of many of the older 
demonstration plantings that were set out with a distance of 4 by 8 
feet, the spacing used in the 1923 plantings was increased to 6 by 10 
feet. The width of the plantings varied from 2 to 10 rows. In a 
small number of plantings the inside row was chokecherry, but the 
following are typical combinations : 
Ten-row plantings: Siberian pea- tree, green ash, northwest poplar, boxelder,. 
northwest poplar, boxelder, northwest poplar, green ash, green ash, Russian- 
ohve. 
Eight-row plantings: Siberian pea- tree, boxelder, boxelder, northwest poplar, 
northwest poplar, green ash, green ash, Russian-olive. 
Five-row plantings: Siberian pea-tree, boxelder, northwest poplar, green ash, 
wild plum. 
Three-row plantings: Russian-olive, northwest poplar, Chinese elm. 
The numbers of trees of the different Idnds used in new plantings 
in 1923 are given in Table 3. 
Table 3. — Number of 
of each kind used in new cooperative shelter-belt plantings 
in 1923 
Kind of tree 
Number 
1 
Kind of tree 
Number 
Northwest poplar 
j 32,871 
1,012 
Boxelder 
1 20,087 
33,043 
Chokecherry 
Wild plum.- 
981 
Green ash 
5,158 
Siberian pea-tree... 
Russian-olive 
.1 35,380 
1 13,934 
Total.. 
142, 466 
Seventy-four additional plantings of one to three rows of conifers 
were made on the inside of older hardwood plantings. These addi- 
1 Applications for plantings in 1925 were received until June 1, 1924, and the total number listed for in- 
spection was 302. 
