68 THE SHELTERWOOD METHOD 



The details as already described relate particularly to the 

 uniform application of the method although in the strip and 

 group modifications essentially the same procedure is fol- 

 lowed except that a given cutting is extended over a portion 

 only instead of over the entire stand. 



Strip Shelterwood Method. — In this modification of the 

 shelterwood method the stand is divided into strips laid out 

 at right angles to the prevailing winds. Starting with the 

 strip on the lee side of the stand the cuttings are made to 

 progress against the wind. 



The first strip receives a preparatory cutting. After a few 

 years it may receive another preparatory cutting or a seed 

 cutting, while at the same time the adjoining strip is given a 

 first preparatory cutting. A few years later the first strip 

 may receive a seed cutting or a first removal cutting, the 

 second strip a second preparatory cutting or a seed cutting 

 and a third strip be given a first preparatory cutting. In 

 this manner (see Fig. 20 and Fig. 21), the series of cuttings 

 progress strip by strip across the stand. 



There appear to be two advantages of the strip arrange- 

 ment over the uniform application. Better protection is 

 afforded against windfall since part of the stand is kept intact 

 as a windbreak and no considerable areas on which the trees 

 stand isolated are left at any one time. Better or quicker 

 reproduction should be secured because of the extra amount 

 of seed furnished by the trees on the adjoining strip which is 

 less heavily cut, and because the side shade and protection 

 against evaporation afforded by this strip should conserve 

 the soil moisture. 



Since coniplete reproduction can be counted on in less time 

 the strip modification allows a decrease in the number of 

 cuttings required to remove the whole stand and consequently 

 those which are made may be heavier. 



