142 FORirST REGULATION 



tions of reproduction, growth, and of market suggest. Criticisms 

 against this method are generally based on the false assumption that 

 when a division and plan is once made, it must be followed without 

 regard to changed conditions in the forest.* 



W'here Shelterwood and Clear Cutting ]\[ethods are employed, 

 a division into smaller lots and into Cutting Series and also a more 

 flexible plan become necessary. In the Selection forest the slow 

 and ea.sy ways of nature are relied upon, every lot receives a 

 thorough cutting over every 10-15 years, mishaps in reproduction 

 are reduced to minute areas and are left for nature to take care of. 

 In clear cutting and planting things are forced, every acre must . 

 justify extra expenses and therefore every acre must be in a position 

 where it can receive attention and care at any time. As soon as such 

 a stand lags behind in growth the plan of regulation must provide 

 for its removal. All this is not possible with a fixed yearly cut in a 

 large iiroperty, and therefore this method has generally been re- 

 placed by the following, either in ordinary or limited form. 



2. Area Allotment. 



The following example illustrates this Method : 



Plan for 1 014- 1933. 



Area of Forest : .^000 acres. 



Species : Spruce. 



;\rethod: Clear -Cut and Plant. 



Rotation : too years, hence five age classes. 



-Ml one site, no ''reduction of areas" necessary. 



Yield per acre of 100-year old stand fully stocked : 9000 cu. ft. 



Plan of I'tilization : all stands in .\ge Class \' (80-100 years 

 old) and older, are considered ripe; also all defective stands and 

 stands in poor condition of growth. 



a. The first step is to prepare a table of Age Classes from the 

 detail field examination. From this a table of allotment as follows: 



* Sucli a misconception of Working Plans in general, and especially of 

 Plan for Regulation of the Cut has led to much unnecessary controversy, and 

 has often led the practicing forester to speak of the Plans as "Paper Jokes." 

 Sec '?\[ichaelis. "Betrieh?regulierung." 1006. 



