THE ART OF THE SECOND GROWTH 



n. The type and the expense of regeneration and pedagogie. 



ni. The dangers from insects, fungi, fire, storm, etc., threaten^ 

 ing the forest. 



The functions of the mixture are so all-important in forestry^ 

 that the synthesis of the age-classes must serve as a main criterion 

 in the construction of a key to the sylvicultural forms. 



It must not be forgotten, however, that age differences of, say, 

 twenty years are very conspicuous during the seedling, sapling and 

 pole stage of the forest; whilst the keenest eye cannot detect these 

 same differences in a forest of veterans. 



In forests exhibiting a large variety of species the analysis of 

 the form presents particular difficulties. Such is the case by far 

 more frequently in primeval than in culled or cultured high forest.. 

 Sometimes a distinct form of a minbr, scattering species appears to 

 be " grafted " upon a distinct form of one or several major, gregari- 

 ous species {"grafted forms"). Where two distinct forms in mix- 

 ture occupy more equal shares (not minor and major shares) in the 

 aggregate display, we may speak of " loedded forms." " Husband 

 and wife, though distinct individuals,' unite on equal terms for a,, 

 life in a household of their own." 



Synopsis of " Forms of Seed Forests." 



A. Primeval forms of seed forests. 



a. Primeval selection form. 

 ,,,.,. 1. pauciveudible 



b. Primeval group form. 



,„ . , i i ^ 2- multivendible 



c. Prmieval compartment form. 



d. Primeval standard form. 



B. Culled forms of seed forests. 



a. Culled selection form. 



b. Culled group form. l. axe culled 



c. Culled compartment form. 



d. Culled standard form. 2. fire culled 



C. Cultured forms of seed forests. 



a. Even-aged main forms, emanating from 



1. cleared compartment type of n. s. r. 



2. short time shelter wood compartment type of n. s. r. 



3. planting 



4. underplanting 



b. Uneven-aged main forms, emanating from 



5. long time shelter wood compartment type of n. s. r. 



6. strip type of n. s. r. 



7. group type of n. s. r. 



8. selection type of n. s. r. 



c. Auxiliary forms. 



9. standard form 



10. two storied seed forest. 



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