44 BULLETIN 308, U. S. DEPARTMENT OF AGRICULTURE. 
Tables 24, 25, and 26 show the total yield in cordwood, yearly 
increment, cost of growing, and the stumpage value per acre, and 
gross rate of money return on the investment for various ages from 
thinned and unthinned stands. 
TABLE 24.—Cordwood yield per acre of unthinned and thinned pure stands of 
shortleaf pine in Virginia. 
[Trees 3 inches and over in diameter breast high.] 
Unthinned stands. Thinned stands—Yield of thinnings. 
Number F Average 
x araalaene Volume |_ trees ADD Volume | Total | Total annual 
Bee ¢ dif Average | ofstand | which sist oftrees | ofall thin- incre- 
ae an incre- before can be Pew on removed | previous} nings | ment, in- 
ment. each |removed | Grirees | imeach | thin- and cluding 
ages thinning.| ineach | Ooved ee nings. | stand. | thin- 
g. nings, 
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) 
Years.| Cords.2 | Cords.2 Cords. Inches. Cords. Cords. | Cords. | Cords. 
20 47 2.3 47.0 930 3.3 Gels [iy cee A 47.0 2.3 
25 57 2.2 52.0 205 4.5 5.1 6.1 58. 1 2.3 
30 62 2.1 57.0 150 5.0 5.0 11.2 68. 2 2.3 
35 64 1.9 60. 0 110 5.5 4.8 16.2 76. 2 2.2 
40 65 7, 60. 0 85 6.0 4.3 21.0 81.0 2.0 
45 64 1.3 59. 0 68 6.5 4.0 25.3 84.3 1.8 
50 63 1.2 57.0 55 7.0 3. 6 29.3 86.3 1.7 
55 61 Tea 54.5 45 TAO See eee 32.9 87.4 1.6 
1Column 9 is the sum of colums 4 and 8. 
2 A cord refers to the standard cord of 128 sticked cubic feet, reducible to the long cord by dividing by 
1.25. Wood has the bark on and all trees are taken 3 inches and over in diameter. 
TABLE 25.—Cost per cord of growing shortleaf-pine cordwood in unthinned and 
thinned stands, thinnings included. 
Thinned stands. 
Unthinned stands. 
Thinnings 
era Wal oe eee ee to Net cost 
= ae Des acre | Pinal Cost of 
ota of pro- : growing 
i . Cost of Assumed} Accu F yield 5 
sented vied. growing |Amount.| value | mulated re per cord. 
age * | per cord.2 per cord.| value. E 
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) 
Years.| Dollars. | Cords. | Dollars. Cords. Potions. Dollars. | Dollars. | Cords. | Dollars. 
7. | ee 11. 04 47 0. 23 6.1 a a fe ae 11. 04 47 0. 23 
D5 eee E 16. 46 57 . 28 5 Das 0. 78 15. 68 52 30 
30 TBST Pe 62 .38 5.0 20 1.97 7A ea > 57 38 
35522 33. 43 64 Aye 4.8 25 3. 79 29. 64 60 49 
40 46. 43 65 - 81 4.3 25 6.37 40.06 60 66 
45 63. 82 64 .99 4.0 25 9.50 54.33 59 92 
50 87.10 63 1FS8 0 os cclees lee ouieenees 13. 40 73.70 57 1.30 
1 Obtained by calculating the interest at 5 per cent, plus 1 per cent for taxes, making a total of 6 per cent, 
compounded annually on a land value of $5 per acre. Since the land will remain after the timber is sold, 
its value is not included in the cost of growing. 
2 Obtained by dividing column 2 by column 3. 
2 The Pin hi of columns 5 and 6 compounded at 5 per cent every 5-year period. The value of w 
Saale a thinnings (column 6) is only nominal on account of its small size and the difficulty of maki 
4 athe Pamatiaer after deducting column 7 from column 2. 
5 Obtained by dividing column 8 by column 9. 
