36 



P-ULLETIX 933, U. S. DEPARTMENT OF AGRICULTURE. 



on large logs. Trees in plantations, therefore, should be grown as 

 long as they appear sound and healthy. Of course, it is impossible 

 to tell at this time what scale of log prices will be used 150 years 

 hence, but, nevertheless, the plantation should be managed with a 

 lone rotation in mind. 





Table 1.". — 1 



'alue o 



f Individ 



ual trees. 1 





Diameter 



Volume 



Value 





Diameter 



Volume 



Value 





breast 



board 



at rail- 



Age. i 



breast 



board 



at rail- 



Age. 



thigh. 



feet. 



road. 2 





thigh. 



feet. 



road. 2 





Inches. 







Years, j 



Inches. 







Years. 



13 



18 



$0.36 



42 I 



22 



190 



$8.20 



79 



14 



27 



.54 



45 



23 



230 



10.80 



85 



15 



40 



.75 



48 



24 



270 



13.80 



92 



16 



52 



1.00 



51 



25 



320 



17.30 



100 



17 



70 



1.70 



55 



26 



380 



21.50 



110 



18 



88 



2.40 



59 



27 



445 



26.50 



121 



19 



110 



3.40 



63 



28 



520 



32.20 



132 



20 



132 



4.70 



68 



29 



615 



39.90 



147 



21 



160 



6.10 



73 



30 



720 



49.00 





1 This table applies to individual trees in groves or open woodlands and not to trees grown singly in 

 the open field. The prices were those current in the year 1918. 



2 As the stumpage price is so variable, depending upon the length of haul, the value of the trees delivered 

 at the railroad is the most constant figure that may be given. Stumpage value may be figured by sub- 

 tracting cutting and hauling expenses from the value of the logs delivered. 



The number of trees on a well-managed plantation will at all times 

 show the maximum that can be grown to the best advantage. The 

 reduction from year to year will be accomplished by frequent thin- 

 nings and will not be left to the processes of nature that lead to ex- 

 cessive mutual suppression and to stagnation of growth. Such a 

 plantation on good soil should yield logs somewhat as shown in 

 Table 16. The calculation is believed to be conservative for the 

 Ohio Valley and northeastern region, but possibly it is somewhat 

 high for the trans-Mississippi States, where height growth is not 

 generally so good and where merchantable length is, therefore, some- 

 what less. 



Table 16. — Possible yield of black iraliint plantations. 



Age 



(years). 



Average 



diameter 



breast high 



(inches). 



Number 



of trees 



per acre. 1 



Board feet 

 per acre. 



Value per 

 acre. 2 



10 

 20 

 30 

 40 

 50 

 60 

 70 

 SO 

 90 

 100 



1.2 

 5.0 

 8.8 

 12.5 

 15.7 

 18.3 

 20.6 

 22.2 

 23.8 

 25.0 



2,700 

 700 

 280 

 160 

 100 

 85 

 70 

 65 

 55 

 50 



















4,800 

 8,500 

 10,500 

 13,000 

 14,300 

 16,000 



SW.OO 

 229.50 

 387. 80 

 566. so 

 726.00 

 S65. 00 



1 Derived from Table 1, p. 2, Farmers Bulletin 711, "The Care and Improvement of the Woodlot," by 

 C. B. Tillotson. 



2 Based on i he value of logs delivered at the railroad and not on the value of the stumpage, as the latter 

 is too largely conditioned by cutting and hauling expense. 



If a plantation, initiated with wider spacing, is left to grow into 

 merchantable timber, the production will be less than that indicated 



