210 



THE THEORY AND PRACTICE OF WORKING PLANS 



Column 4 



5 

 6 



7 

 8 



9 



lO 



II 



12 

 13 

 14 

 15 

 16 



17 

 18, 

 19 

 20, 

 21 

 22 



23 

 24 



25 



Area in hectares of the 



subdivisions, 

 divisions. 

 Site, exposure, soil. 

 Percentage of each species. 

 Density and growth of the stand, 

 present, 

 at the time of cutting. 



final cuttings f ordinary, 

 in hectares [ extraordinary. 

 Thinnings, in hectares. 



final cuttings | ordinary, 

 in hectares [ extraordinary. 

 Thinnings, in hectares. 



-r-r-r . , . . , f final. 



III period cuttmgs, m hectares i ^, . 



^ ^ [ thinnmgs 



IV period cuttmgs, in hectares 



Age 



I period 



Thi: 



II period 



V period cuttings, in hectares 



yi period cuttings, in hectares 

 Remarks. 



thinnings. 



final. 



thinnings. 



final. 



thinninofs. 



The number and length of the periods vary with the species 

 and the locality. For oak in central France eight periods of 

 twenty-five years each are formed ; for beech usually six periods 

 of twenty years each ; for fir four or five or more periods of thirty 

 years each. The number of the periods and their length require 

 the approval of the minister.* 



The rotation age is only fixed tentatively " without attempt- 

 ing to fix it definitely by applying experiences whose value is 

 often only specious." f 



For the state forests a rotation age is chosen which corre- 



* Formerly of the Emperor himself by a decree. 

 t From a French working plan. 



