REFORESTATION ON THE NATIONAL FORESTS. 
33 
With a suitable area well prepared, the amount of seed of the 
more important species required per acre is about that shown in 
Table 6. The amounts are based on the average germination per 
cent given in Table 5. These quantities should be varied, as germina- 
tion tests differ from those shown in this table or as spacings of 
seed spots differ. 
Table 6. — Number of seed required per acre. 
BROADCAST SOWING OVER THE WHOLE AREA. 
Species. 
Western red cedar 
Douglas fir 
Amabilis fir 
Grand fir 
Noble fir 
Red fir 
Austrian pine 
Jeffrey pine 
Lodgepole pine 
Maritime ptae — 
Species. 
Mexican white pine. 
Norway pine 
Scotch pme 
Sugar pine 
Western white pine . 
Western yellow pine 
White pine 
Engelmann spruce. . 
Norway spruce 
Sitka spruce 
Seed per 
acre. 
Pounds. 
8-10 
4 
7- 8 
10-20 
8- 10 
6- 8 
8-10 
2- 4 
5- 7 
2- 3 
SEED-SPOT SOWING. 
[Spots spaced 7 by 8 feet; approximately 10 to 12 good i seed per spot.] 
Bigtree 
Western red cedar. 
Arizona cypress... 
Douglas fir 
Amabilis fir 
Grand fir 
Noble fir 
Red fir 
Austrian pine 
Jeffrey pine 
Lodgepole pine — 
Maritime pine 
Mexican white pine. 
Norway pine 
Scotch pine , 
Sugar pine 
Western white pine . . 
Western yellow pine. 
White pine 
Engelmann spruce . . 
Norway spruce , 
Sitka spruce 
» For example, if the germination tests showed 50 per cent germination, 24 seed would have to be sown 
to have 12 good seed. 
A standard stocking of about 800 trees per acre has been adopted 
for nearly all of the planting operations on National Forests. This 
stocking is undoubtedly not the most desirable for all species or 
sites, but is considered the best to adopt as a general standard. As 
more becomes known about the various species, different spacings 
will doubtless prove more suitable. Uniform stocking has the ad- 
vantage of facilitating calculations and making comparisons of 
different planting operations. As a matter of fact, because of the 
roughness of the country, the rocks, logs, and brush on the plant- 
ing areas, uniformity in stocking is not attained. The number of 
trees planted per acre varies from 600 to 1,000 or more. 
COSTS. 
The elements which have a material bearing upon the cost of 
sowing or planting are many, and are sometimes unforeseen. The 
