ORSAinSATION- OF SBmCTION-WDRKED FOEESTS.. l^T 



forester, be tha-t the volume of the type tree would go on dlminish- 

 iug uatil it reached 120 cubic feet. Thus under any circumstances 

 the system of felling by Selection, so many trees per acre Invariably, 

 results in eventually bringing the forest into a certain stationary- 

 condition, the stock in that state being larger,,_the smaller the. num- 

 ber of trees exploited per acre is., 



And more than this, the same result follows for eac^ separate - 

 coupe,. and it is this very peculiarity that enables Selection.Fellings- 

 based on numberof trees to be carried out in a. systematic manner.. 

 The object of reducing thenv. to a system is to concentrate each 

 annual exploitation into a definite portion of the Working Circle, a . 

 condition that is a necessary guarantee for the judicious marking of 

 the trees to be felled and a most fruitful source of economy in 

 making the fellings. Moreover another systematized result of , this - 

 manner of working is that the area of each, coupe is then suffi-- 

 ciently large to admit of a, short periodicity, and . thus ■ render it 

 possible always to exploit at the right time all mature or dying trees - 

 and to avoid the simultaneous felling of any considerable number of .' 

 trees within, a given limited area. The periodicity of the Selection ^ 

 Eellings depends entirely on the- forest concerned and its compo- - 

 nent species. As a rule, it is 5, 8, 10,- 12,. or 15 years. It ought 

 to be short for the spruce, long for the larch, shorter in fertile soils - 

 than in barren soils, longer in rigorous climates. The periodicity of , 

 the Selection Fellings having been, determined, the order in which . 

 the compartments should., be exploited. may be fixed at once for- the - 

 whole Rotation. At the beginning the well stocked- compartments . 

 will yield large timber, those poorly.- stocked small, timber ; but a . 

 certain equilibrium will soon be established, _ provided the annual.- 

 fellings go over areas of nearly equal productive power. . The only • 

 disadvantage in fixing the yield at-so many trees per unit of.area is - 

 the inequality of the outtura.from-^ear to year. . But this inequality 

 is more apparent than real, and it can be easily remedied by divi — 

 ding the forest into Working Gitcles, . which.need. not.be large in. 

 forests worked by Selection. 



Such is the procedure which we recommend in organising - 

 forests in which the Selection System has to be maintained. It now 

 remains for us to say what we consider necessary as. regards the.- 

 actual execution.of the Organisation Project. . 



