822 1>ETEKML\AT10N AAD KEGULATlON OF THE YIELD. 



it prescribes a definite annual yield, while not a single mature 

 wood may be present; or it prescribes too small a yield, when- 

 ever a considerable portion of the area is stocked with decrepit 

 old woods, which ought to be cut over as quickly as possible 

 and replaced by vigorous young woods. In all such cases, the 

 yield, as fixed by the formula, must be modified in accordance 

 with the requirements of each case. 



The method does not distinguish in the yield between 

 increment and growing stock, and in this respect, it stands 

 below the Austrian method. Moreover, it may drag a 

 surplus of growing stock over even more than one 

 rotation. 



Hundeshagen assumes, that, with the yield calculated 

 according to his method, the normal growing stock will be 

 established naturally, as the yield bears a fixed proportion to 

 the real growing stock; if the latter is greater than the normal 

 amount, more than the increment will be removed, and vice 

 versa. This is ordinarily the case, but not under all circum- 

 stances. If, for instance, both the increment and growing 

 stock are deficient, the yield may be greater than the incre- 

 ment, so that the growing stock is still further reduced, at any 

 rate for a time ; hence, the establishment of the normal state 

 may be considerably delayed. 



On the other hand, Hundeshagen s method has this great 

 advantage, that the increment need not be determined, such 

 a determination being at all times beset by difficulties and 

 uncertainty. All that the method requires is a suitable yield 

 table, and the measurement of the growing stock actually 

 standing in the forest. Hence, the method is by no means to 

 be despised, if a general plan is added indicating the grouping 

 of the age classes to be aimed at. For the rest, it leaves a free 

 hand to the manager to shape the management in accordance 

 with the requirements of each case, as long as the volume 

 determined by the formula need not be rigorously cut. It 

 may reasonably be assumed, that Hundeshagen himself 

 expected this. 



