THE ART OF THE SECOND GEOWTH 



Seedlings regenerating under their own kin resemble altricial 

 (nidieole) birds; seedlings avoiding parental superstructure might be 

 likened to precocial (nidifugal) birds. 



A. The chances for successful regeneration in these types 

 seem excellent. Still, the following points must not be lost sight of: 



I. Advance growth badly suppressed for a long time is fre- 

 quenlH so badly crippled that it fails to recover within a reasonable 

 number of years. 



II. The advance growth is badly smashed by and during the fell- 

 ing operations, unless the mother trees are pruned and lopped before 

 felling, and unless the timber obtained is carried out either by 

 hand, or on high wheel trucks, or on a heavy cover of snow pro- 

 tecting the advance growth. Under any circumstances, fellings 

 during the period of vegetation must be avoided. 



III. Advance growth suddenly exposed to the full influence of 

 sun, rain, snow^, sleet, etc., is apt to suffer in case of sensitive species. 



IV. A minute system of permanent roads is required, the ad- 

 vance growth usually appearing in groups or patches. 



V. If the pure types of advance growth n. s. r. were strictly 

 adhered to, a regulation of the annual cut according to the condi- 

 tions of the market would be difficult to obtain. Hypermature trees 

 would have to be left everywhere — merely because young growth 

 is often slow to form on their feet. 



In such cases, artificial preparation of a seed-bed (e. g., by 

 uncovering the mineral soil) seems absolutely required, so as to 

 expediate the formation of an advance growth. 



If the leaf canopy overhead is opened at the same time by 

 felling operations, the types bastardize with the shelterwood types 

 of n. s. r, 



B. According to the extent of the area covered by an 

 advance growth of suitable character we distinguish between: 



I. Advance growth compartment type of n. s. r., the areas 

 uniformly covered by advance growth measuring from twenty to 

 one hundred acres (rare). 



II. Advance growth strip type of n. s. r., the areas uniformly 

 covered by advance growth appearing as strips measuring up to 

 500 feet in breadth (very rare). 



III. Advance groAvth group type of n. s. r., the groups covered 

 by advance growth having an extent of from one-tenth to four 

 acres (frequent). 



IV. Advance growth selection type of n. s. r., the young seed- 

 lings and saplings appearing in scattered and small patches (very 

 common). 



