APPLICATION OF SHELTERWOOD METHOD 79 



conditions making profitable the removal of the stand in 

 several cuttings. To justify such operations there must exist: 



A market for small sized and low grade forest products 

 (particidarly cordwood). 



An organization of the logging so arranged that the same 

 area can be operated at short intervals for a period of 

 years necessary to establish reproduction. This in- 

 creases the expense of logging, requiring, as it does, an 

 extension of the time within which a specific amount of 

 timber is taken from a given area, and considerable 

 care to preserve reproduction in felling and transport- 

 ing trees from the felling area. 



As explained under "Extensive versus Intensive Applica- 

 tion," page 76, shelterwood, shorn of its refinements, can be 

 used in a crude way under comparatively poor market con- 

 ditions. 



3. Greater technical skill is called for in applying shelter- 

 wood than is needed in the case of the clearcutting and seed 

 tree methods. When selection is used with an equal degree 

 of intensiveness it calls for more technical skill than does 

 shelterwood. 



4. Part of the re production is destroyed in the removal 

 cuttings. Where the proper care is exercised the inevitable 

 destruction of some young trees in the logging will not reduce 

 the reproduction below the point of full density. Careful 

 work to keep damage to reproduction at a minimum tends to 

 increase the expense of logging as previously stated. 



Application of the Shelterwood Method. — As yet the eco- 

 nomic conditions permitting the intensive use of shelterwood 

 are found in relatively few sections of the country. East of 

 the Great Plains and north of Mason's and Dixon's line there 

 are many districts where to-day cordwood is salable and 



