132 THE PRINCIPLES OF HANDLING WOODLANDS 



which are mature, deteriorating, diseased, insect-infested, 

 or damaged by fire or other agency. 



4. Windfall. The cuttings may be made so as to 

 reduce to a minimum the damage to the remaining stand 

 by windfall. In a broken topography the irregular loca- 

 tion of cuttings is the best method of making clearings 

 so as to avoid this danger. 



The Second Cutting. The problem of reproduc- 

 tion at the time of the second cut is taken into account 

 in locating the first clearings. In some instances the 

 location of a clearing may be determined entirely by this 

 consideration. Suppose, for example, that there is a 

 choice between locating the cutting on a site exposed 

 to windfall and on a sheltered site. This might occur 

 where a strip is to be cut on one side of a ravine and 

 not the other. The exposed side is cut at the first 

 operation, and the sheltered side left for the second cut. 

 When the second cut is made, reproduction may be 

 accomplished by leaving seed-trees, or by some other 

 system applicable where the danger from windfall is 

 removed. 



On the other hand, there are many instances in every 

 operation where the problems of logging and present 

 reproduction do not permit locating the cutting primari- 

 ly with reference to the second operation. In this event 

 the situation is precisely that of the conventional alter- 

 nate strips. 



Progressive Cleared Strips. This method provides 

 for the gradual clearing off of a stand of mature timber 



