REFORESTATION ON THE NATIONAL FORESTS. 



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. 



90. 70-S2. 25 



2.00 



. 66- 1. 36 

 . 36- 1. 13 

 . 38- 1. 13 

 .53- .83 

 .23- .63 



2.43 



3.41 



Species. 



Jeffrey pine 



Lodgepole pine 



Norway pine 



Sugar pine 



Western white pine . 

 Western yellow pine 

 Sequoia (redwood).. 

 Sequoia ("Bigtree") 

 Engelmann spruce . . 



Cost per 

 pound. 



80. 42-$0. 84 

 1.70- 2.00 

 2. 63- 3. 19 



.50- .65 

 2. 43- 2. 83 



.41- .67 

 1.63 



. 66- 1. 22 

 1. 00- 2. 41 



62479°— Bull. 475—17- 



