THE ART OF THE SECOND GROWTH 



merely work toward a " groupwise " or " patcliwise "' successful 

 seed regeneration. 



F. According to the number and according to the dis- 

 tribution of standards left in the regeneration "area": Xatural 

 seed regeneration: 



a. With standards systematically left all over the compart- 

 ments ; 



b. W^ith standards left in strips; 



c. With standards left in groups; 



d. With isolated scattering standards. 



The " compartment " types had better be called " uniform " 

 types ; the " selection " types had better be termed " patch " types. 

 Still the terms " Shelterwood compartment system " and " shelter- 

 wood selection system " having become standard terms of forestal 

 terminology, it seems unwise to throw them aside. 



A number of " pure types " may be, and usually are. combined 

 into " bastard types." Of course, only types more closely related 

 allow of bastardizing. 



Bastard types frequently found in the old country are: 



"Advance groAvth selection" and "shelterwood group" type; 



" Advance growth gxoup " and " shelterwood compartment " 

 type; 



" Shelterwood group " and " shelterwood strip " type ; 



" Cleared strip " and " advance growth strip " type ; 



" Cleared group " and " shelterwood group " type ; 



" Cleared selection " and " shelterwood group " type. 



Modern forestry abroad begins to despise methodical rules, 

 gradually returning to nature with her irregularities. Pure, 

 abstract types of seed regeneration are more and more discarded. 



The selection of a method or a combination of methods depends 

 entirely upon the composition of the growing stock found; on local 

 dangers; on local means of transportation; on value of stumpage 

 and prospective value of seedlings. 



Where all age classes are mixed irregularly, individual selec- 

 tion is, ceteris paribus, indicated. 



Where the age classes or the species appear in groups, the 

 group method is or may be advisable. 



In woods simultaneously maturing, the uniform type may 

 recommend itself. 



G. H. S. Graves, in " The principles of handling wood- 

 lands " distinguishes between the following " systems " — he does not 

 use the term type — of natural seed regeneration: 



113 



