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), pajdng 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. J 



The general cutting plan takes the following form: 

 Column I a Block and compartment. 

 lb Subcompartment. 

 2 Soil description. 

 5 Site quahty. Average height. 

 Average age and age limit. 

 Percentage of stocking (density). 

 Form of mixture (scattered, groupwise, etc.) 

 Percentage of chief species in mixture. 

 Species (repeated between columns 18 and 19). 

 Defects and diseases. 

 Area of the whole compartment, 

 over 120 years 

 101-120 

 81-100 

 61- 80 

 41- 60 



4 



5 

 6 



7 

 8 



9 

 10 



II 



12 



13 

 14 



15 

 16 



17 J 



Area by 

 Age 



Classes 



I 



II 

 III 

 IV 



V 

 VI 



21- 40 



I- 20 



area in hectares. 



* For outline of Prussian working plan, see p. 153. 



t " Anweisung zur Ausfiihrung von Betriebsregelungen in den Preussischen 

 Staatsforsten vom 17. Marz, 1912." 



X 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 difl&cult conditions only 'are the first and 

 second periods to be provided for.' " 



