SELKCTION-WOEEED' FOEESTS UNDER TEANSEORMATION. 195- 



removed aunnally being fixed at the same time. If it was decidedi 

 to cut on an average one-third oi a tree per^ acre, then the total 

 number of trees to be felled by Selection, during the First Period. 

 ia these three Blocks would be 250 per annum. . 



If there was reason, to fear that to© short a periodicity for the 

 Selection Fellings would have the effect of exhausting the crops 

 operated upon,- then it could be raised to 9 years;, in other worda- 

 the area would be divided into- 9 coupes of- equivalent productive- 

 power and the successive order and yield, of these ■ coupes deter- 

 mined as just described.. At the end of the Period, or even afc. 

 each revision of the yield, the results obtained by these restricted; 

 Selection Fellings should be noted, and in this manner it would-, 

 be easy to judge whether it would be expedient to maintain, raise, , 

 or reduce the nu-mber of trees- fixed, at starting.. 



With the Selection Fellings restricted to really mature trees, _ 

 no matter what their size, it is possible to maintain a selection- 

 worked forest unchanged, as regards the density of the component, 

 erops, for an indefinite period. of4ime.. Our finest silver fir forests 

 prove this. The Blocks to be transformed last must, as a conse-- 

 quence of such treatment, assume more and more the appearance - 

 of regular Old, High Forest until regenerated each in its proper 

 turn, provided always that overtopped .poles are on no condition , re- - 

 moved. 



Besides this, it is easy to see that- with' the prodiiee derived' 

 feom Transformation Fellings in one part of the forest and from. 

 Selection Fellings everywhere else, the yield of the First Period can 

 scarcely ever fail to reach a sufficiently high figure. The extraction, 

 ef material over and above the outturn of these cuttings, if it must 

 be effected in some portions of the Working Circle in order to fill up^ 

 any defik;it, should hence be restricted to a few really exceptional 

 localities, and the exploitation of such- produce should' be spread 

 ever a number of years so as to remove only moderate quantities 

 at a time and avoid all risk of converting its extraction into a series 

 of operations disastrous from a cultural point of view and dangerous - 

 in every other respect. We would deprecate any attempt to fix the 

 Eotatiott for transformation below the figure that would have been 

 lequired for the same forest had.it been already regularised^ Ihiere ■ 



