SYLVICULTURE 



D. Disadvantages: 



I. The type is applicable only to intense shade bearers; and 

 these shade bearers are very apt to sutfer from sudden changes of 

 environments. 



II. The logging expenses are very badly increased in the attempt 

 to save the advance growth from destruction. 



III. Under any circumstances, the rapid removal of mother trees 

 inflicts scars upon the young growth apt to serve as entrance gates 

 for fungi and insects. 



Paragraph LIV. The advance growth strip type of natural seed re- 

 generation. 



A. Advance growth, being a chance product, is rarely found in 

 symmetrical, long-drawn strips. "V\^lere the cleared strip-type is in- 

 troduced, however, a strip of advance growth is often and easily 

 started underneath the border trees joining the cleared strip to the 

 v.indward. In that ease, the advance growth strip-type is bastardized 

 with the cleared strip type. 



"B. Actual application: 



The type is found only in the bastard form just mentioned. 



C. Advantages: 



I. Xo expense required for regeneration (unless weeds, leaves 

 or moss are removed). 



II. Advance growth is readily saved, where the logs are removed 

 through the adjoining woods. 



III. A road system touching the lower edge of the strips is 

 sufficient. 



IV. Soil is never laid bare. 



V. Little damage from rainfall. 



D. Disadvantages: 



I. Scattering operations. 



II. Type is not applicable to light demanders. 



III. Hypermature trees must be left in the woods until the 

 strips, after many years, may approach them. 



IV. Points of attack from which cutting may proceed are apt 

 to be lacking, unless the forester is able to maintain a very large 

 number of narrow cutting series, helped by the configuration of 

 the ground. 



Paragraph LV. The advance growth group type of natural seed re- 

 generation. 

 A. In nature, advance growth usually appears in small bunches 

 or in groups, for the reason that there is always a chance for many 

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