a:\ierican sylviculture 



left unless they stand close to a road, or unless they are certain 

 to outlast a second rotation. 



j. Pruning of mother trees: Low branches which oversliadow 

 the young growth heavily should be cut. 



k. Transportation of wood: All wood and timber should be 

 moved to the nearest roads as soon as possible after the trees are 

 cut. Speedy removal is especially necessary in coniferous forests, 

 the young growth having little reproductive power. A snow cover 

 might be used to remove the wood on sleds; high-wheeled trucks 

 will answer splendidly on level ground. The method of " roping " 

 used in the Black Forest also saves the young growth. All wood 

 and timber must be removed from the regeneration area •previous 

 to tlie opening of the buds. 



I. Pasturage: There is no need to say that the young growth 

 should be protected against pasture. 



m. Reinforcing: Blanks should be filled only when the mother 

 trees have been entirely removed. Tlie plants may be taken from 

 dense places where the natural regeneration is complete or, better, 

 from nurseries. 



Paragraph XLIX. The shelterwood strip type 

 of natural seed regeneration. 



a A. This type bears the same ratio to the shelterwood com- 

 partment type of regeneration which the cleared strip type bears 

 to the cleared compartment type. 



In the shelterwood strip type, as in the cleared strip type, 

 fellings and regeneration begin at the leeward side of a compart- 

 ment (cove, slope) and proceed gradually against the direction of 

 the prevailing storms, or else from the North to the South. 



Heavy-seeded species as well as light-seeded species allow of 

 the strip type. Distinct light demanders, however, defy it on the 

 poorer grades of soil. 



The nuclei are laid out geometrically in the shape of strips 

 crossing the prevailing wind-direction at right angles. The most 

 leeward strip is in the final stage; the most windward strip is in 

 the preparatory stage; the middle strip is in the seeding stage, 

 provided that the conditions are normal. 



The breadth of a strip depends on species, frequency of seed 

 years, configuration of ground and so on. At a breadth of over 

 500 feet, the strip type bastardizes with the compartment type. 

 130 



