44 



THE WHITE PINE. 

 Taiii.k \U. — -Icre yield »/ younij pine ijrorvi) — Coiitiiiiie<l. 



It would be possible to increase tho number of trees that could grow per acre and develop 



satisractorily by attention of the forester, as will appear from the statements rejiardiiifr tlie White 

 Pine fore.st plantations in Germany, where pure White Pine growths showed at sixty-eight years 

 still over six hundred and seventy trees, and in another place at eighty-two years seven hundred 

 and twenty-three trees, and at one hundred and four years over two hundred and fifty trees per 

 acre. Even in such close stand the crown of living branches remains long, <)ccu|)yiiig one-third of 

 the bole, and dry branches persist down to over lialf the length. The stems are straight and 

 cylindrical, in this respect also reminding one of the Norway S]>ruce, although the tendency to 

 fork seems more fre(iuently develoi)ed. 



YIELD OF WHITE PINE. 



The (|uestion as to the amount of material which the White I'iiie is capable of producing per 

 acre is dillicult to answer. It can not, of course, be deduced from a knowledge of the development 

 of the individual tree, since there reniiiins one factor unknown, namely, the number of trees of 

 dilVercnl classes that can occupy an acre. Nor can the (-apjicity of jn'odnctioii, as a rule, be ascer- 

 tained from the actual production or acre yield of natural virgin growths, for these usually not 

 only (to not octnir in ]>ure growths, but al.so anr usually not develojied under most advantageous 

 comlitions, and do not, theretbre, rejiresent tlie possible or normal yield which could Im securtul. 

 Only by selecting smaller, .seemingly normally and favorably develoi>ed groups in the forest at 

 ditVercnt ages ami in various localities and measuring the .same may we arrive at an ap])roximation 

 of what the species is capable of juoducing by itself. 



Such measurements have not been attempteil, but the yield of virgin acres under vaiying 

 conditions has been ascertained to give at least a forecast of the ])os8ibilities, altliough not repre- 

 senting the normal or possible yield of fully stocked acres of White Pine. In addition we may 

 utilize the results recorded from Germany (page (!fl) of a number of plantations, which have had 

 the advantage of at least the partial care of forest management. 



From these indications, we are justified in the assertion that the White Pine produces per 

 acre as well as any species with which we are ac(|uainted in our northeastern woods, and at a rate 

 which is not excelled by any of the lumber trees within its range. 



In this respect, again, it approaches the German S|)ruce, though it probably excels this species 

 in persistency, as it does in the dimensions which it can produce. We can, therefore, for the fir.st 



