THE THEORY AND PRACTICE OF WORKING PLANS 



173 



the area-period method (Flachenfachwerk) for the more regular 

 conditions.* 



Of late the calculation of cut has been more and more 

 confined to the ensuing period (the I period), paying little or 

 no attention to the periods following (periods II, III, IV, V, 

 and VI). This is especially marked in the instructions for 

 191 2,t which go a long way toward ameliorating the strict 

 " framework " methods. Wagner considers them an abandon- 

 ment of the " framework " methods. t 



The general cutting plan takes the following form: 

 Column la Block and compartment. 

 lb Subcompartment. 

 2 Soil description. 

 5 Site quality. Average height. 



4 Average age and age limit. 



5 Percentage of stocking (density). 



6 Form of mixture (scattered, groupwise, etc.) 



7 Percentage of chief species in mixture. 



8 Species (repeated between columns 18 and 19). 



9 Defects and diseases. 



10 Area of the whole compartment, 

 over 120 years 

 101-120 

 Area by II 81-100 

 Age III 61-80 !• area in hectares. 



Classes IV 41- 60 

 V 21-40 

 VI I- 20 



* P'or outline of Prussian working plan, see p. 153. 



t " Anweisung zur Ausfiihrung von Betriebsregelungcn in den Preussischen 

 Staatsforsten vom 17. Marz, 191 2." 



t Wagner, in the third edition of Lorey's " Handbuch der Forstwissenschaft," 

 Vol. Ill, p. 463, takes the position that the new instructions (1912) " entirely 

 abandon the ' framework ' methods (No. 17) and go over to the method by age 

 classes (No. 16); one must not be deceived by the retention of the ' framework ' 

 terminology ... An assignment of areas and volume, to all the periods of the 

 rotation no longer takes place; under difficult conditions only 'are the first and 

 second periods to be provided for.' " 



