REFOEESTATION ON THE NATIONAL FOEESTS. 
17 
heaviest; and one-half per cent for seed of class 3. Seed of class 4 
was not tested ; but this class is mostly debris and broken seed. 
YIELD FROM CONES. 
There is great variation in the yield of seed from a bushel of 
cones. The amount depends upon the quality of the cones, the 
thoroughness of the drying and extracting, and the manner of clean- 
ing. The cones of any species fill better during a seed year " than 
during " off years," so that in the former there is greater bulk, and 
especially greater weight of seed. Table 2 shows by species about the 
average quantity of seed per bushel of cones or fruits. 
Table 2. — Quantity of seed per bushel of cones or fruit of different species. 
[Quantity varies considerably in different regions or years.] 
Species. 
CONIFEROUS 
Incense cedar 
Western red cedar 
Douglas fir 
Amabilis fir 
Noble fir 
White fir 
Western hemlock 
Western larch 
Lodgepole pine 
Norway pine 
Sugar pine 
Western white pine 
Western yellow pine 
White pine 
Number 
of 
pounds. 
2. 50 
.75 
1.00 
3. 00 
2. 50 
3. 00 
1.00 
.50 
.40 
1.00 
1.60 
.75 
1.50 
1. 00 
Species. 
CONIFEROUS— continued 
Engelmann spruce 
Sitka spruce 
HARDWOOD. 
Black walnut (husked) 
Butternut (husked) , 
Chestnut (clean) 
Bitternut hickory 
Pignut hickory 
Shagbark hickory 
Red oak acorns (clean) 
White oak acorns (clean) 
Number 
of 
pounds. 
0.80 
1.25 
40.00 
40.00 
50.00 
40. 00 
40.00 
30.00 
50.00 
70.00 
COST OF SEED. 
Many factors influence the cost of seed, such as the quantity and 
quality of the crop, the species, the remoteness of the area from a 
railroad, the method and scale of collecting, the character of the 
weather during collection and extraction, and the method of extrac- 
tion. Some costs per pound of seed gathered in fairly large quanti- 
ties by the Forest Service are shown in Table 3 : 
Table 3. — Cost of seed. 
Species. 
Incense cedar 
Western red cedar 
Douglas fir 
Amabilis fir 
Noble fir 
Red fir 
White fir 
Western larch 
Jack pine 
Cost per 
pound. 
$0. 70-52. 25 
2. 00 
.6&- 1.36 
.36- 1.13 
.38- L13 
.53- .83 
.23- .63 
2. 43 
3.41 
Species. 
Jeffrey pine 
Lodgepole pine 
Norway pine 
Sugar pine 
Western white pine. 
Western vellow piae 
Sequoia (redwood).. 
Sequoia ("Bigtree") 
Engelmann spruce. . 
Cost per 
pound. 
$0. 42-$0. 84 
1.70- 2.00 
2. 63- 3. 19 
.50- .65 
2. 43- 2. 83 
.41- .67 
1. 63 
. 66- 1. 22 
LOO- 2.41 
62479°— Bull. 475—17 3 
