:2V' s TENDING (»F CROWDED WOODS AFTER EARLY YOUTH. 



tl. Principal Adnitttafics of Thinninfis. 



The principal advantages of thiDiiings are as follows: — 

 (a.) They afford the means of guiding the development of a 

 wood in accordance with the objects of management, 

 either by producing the iireatest possible quantity, or 

 the best possible quality of produce ; in some cases 

 l>oth these objects may be combined. 

 (b.> They afford the means of preserving a suitable mixture 



in the case of mixed woods, 

 (c.) Danger from insects, fungi, and fire is greatly reduced 



by the prompt removal of dead and sick trees, 

 (d.) They afford the means of strengthening the trees 

 destined for the final crop against damage by snow, 

 rime and wind, 

 (e.) They yield substantial early returns. 

 The returns from thinnings should not be under-estimated, 

 especially where the object of management centres in the 

 production of quantity. According to the yield tables of Weise, 

 Scotch pine may be expected to yield the following returns 

 under a rotation of 100 vears : — 



Quality Cla^ of Locality. 



ri'H-:-> JE s:.".:i: cubic fe#t perj 



Intermediate 



Retoms, or Final BeTorii*. 

 Thinnins*. 



oTInto-- 



T w^l i^ t^ to 

 Final ! 

 Total. B*ain»*, in n 



WT C*nt. 



Similar infoimation regarding the yield of thinnings in 

 spruce, silver fir and beech woods will be foimd in Volume III. 



