4 BULLETIN 1003, U. S. DEPARTMENT OF AGRICULTURE. 
ARIZONA AND NEW MEXICO. 
Total-area,in the national: forests==) 4 ai te Ee ees acres__ *4, 571, 425 
Total:stand in the national-torests== board feet__ 17, 002, 000, 000 
Notal annual cut GOI): 2 aes ere ee ee OS 154, 297, 815 
. Total area annually cleared (if clear cutting is em- 
ployed!) 22 2292 ke aS ee eee ae acres__ 38, 574 
Total annual volume of stumpwood_~—-___________-____ cords__ *77,148 
For average stands the number of trees over 18 inches varies from > 
85 to 12, and the number of those over 24 inches varies from 7 to 9; 
heavy stands have from 12 to 30 trees 18 inches and over, and from — 
11.5 to 20 trees 24 inches and over. , 
Since 500 board feet is a liberal average volume for a yellow-pine- 
tree 22 inches in diameter at breast height, or 24 inches on the stump 
(3, 13), stands of 5,000 feet an acre would contain 10 trees averaging 
24 inches on the stump. The average stand over Arizona and New 
Mexico being approximately 4,000 board feet for all the area covered 
with yellow pine, the average number of 24-inch stumps an acre would 
be 8. Many thousands of acres show stands above 5,000 feet, the 
actual number of trees 24 inches and over being from 10 to 15 to the 
acre. 3 
It is evident, therefore, that this region has future possibilities 
from the standpoint of wood by-products, if it is found that a fair 
percentage of the stumps are rich in resin. No account has been 
taken of the material obtainable from “fat” limbs or “pitchy” butts, 
and only the timber on national forests, where accurate cruises 
have been made, is here considered. Though no figures are avail- 
able for the timber on private holdings, Indian lands, and the pub- 
lic domain, it is known that these areas are quite extensive, and many 
of the stands are average or better. 
CALIFORNIA. 
Total” aneatee eso oe a ESS & -s Seeee seve acres__ 10, 000, 000 
otal Stang! = 252 fs Oa Sn PS ee board feet__ 85, 000, 000, 000 
TNotalsannual cu ,Qlolt) 42_- 22 ae ee eee doses 154, 297, 815 
Total area annually cleared (if clear cutting 
is employed) sa2— = 2 es She oe Sane SMM PE Ne: acres__ 38, 574 
Total annual volume of stumpwood___-___---___---_-__cords_- * 77, 148 
California has about 10,500,000 acres of commercial yellow pine, 
with from 85,000,000,000 to 90,000,000,000 board feet, or from 8,000 
to 12,000 board feet an acre. Trees above 12 inches in diameter, breast 
high, have an average diameter of 38 inches, or approximately 41 
inches on the stump, for which reason the yellow-pine trees of Cali- . 
fornia are the largest known. Since the species usually grows in 
mixed stands, the number of trees an acre is low. The pitch content, 
however, is higher than that in any other section. As the yellow 
pine in California is the heaviest known (Table 1), the amount of 
“pitchy” wood can safely be taken as average or better. 
3 National forests only. 4For reducing factors see Table 6. 
