REFORESTATION ON THE NATIONAL FORESTS. 
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east, northeast, and northwest slopes up to about 4,000 feet. On 
either of these situations the best results are obtained in deep, loose 
soils, free from rock. 
Western yellow pine: (1) South slopes up to 4,000 feet (on the 
Bitterroot Mountains up to 5,500 feet) ; (2) southeast and southwest 
slopes up to 3,500 feet. 
Douglas fir : North slopes up to 6,000 feet. 
Western red cedar : Favorable north and northwest slopes in mix- 
ture with western white pine up to 4,500 feet. 
Engelmann spruce: (1) North slopes from 4,000 to 5,500 feet. In 
mixture with other species on north slopes from 3,500 feet upwards; 
(2) east and west slopes from 4,000 to 5,500 feet. 
Western larch: (1) North slopes from 4,000 to 6,000 feet. In mix- 
ture with other species on north slopes from 3,500 feet upwards; (2) 
south, east, and west slopes from 4,000 to 6,000 feet. 
Colorado, Wyoming, South Dakota. 
Western yellow pine: Between altitudes of 5,300 and 8,500 feet, 
the sites in order of their favorableness are: (1) all aspects of burns 
or cut-over areas, for the most part devoid of vegetation, which have 
failed to restock naturally even though soil and moisture conditions 
are normal; (2) all aspects of burns and cut-over areas with a well 
defined cover of aspen; (3) all aspects of burns and cut-over areas of 
long standing, with or without aspen, where moisture and soil condi- 
tions are normal, though such sites are almost invariably overgrown 
with a heavy cover of sod, grass, and weeds; (4) all aspects of open, 
grassy parks without trace of any former timber, where moisture 
conditions are normal and the soil is of good depth; (5) north and 
east aspects of open parklike areas without traces of former timber, 
often found in the yellow pine and in the lower limits of the Douglas- 
fir types, supporting dense stands of oak brush and occasionally lone, 
stunted balsams but with moisture both of air and soil deficient; (6) 
north aspects of low foothill, brush, and sagebrush areas in the lower 
limits of the yellow-pine type where yellow pine, pinon, juniper, and 
sagebrush may be associated. 
Sowing should be attempted only on the north and east aspects of 
sites 1, 2, and 3 in the Black Hills region of South Dakota. 
Douglas fir: Between altitudes of 8,200 and 9,400 feet, the sites 
in order are: (1) all aspects of burns or cut-over areas, for the most 
part devoid of vegetation, which have failed to restock naturally even 
though soil and moisture conditions are normal; (2) all aspects of 
burns and cut-over areas with a well-defined cover of aspen; (3) 
north and east aspects of burns and cut-over areas of long standing, 
