AMERICAN SYLVICULTURE 



C. Advantages: 



I. Xo exponso required for ri'j^'oncration (unless weeds, leaves 

 or moss are removed). 



II. Advanee growth is readily saved, where the logs are removed 

 through the adjoining woods. 



III. A road system touching the lower edge of the strips is 

 sufficient. 



IV. Soil is never laid bare. 



V. Little damage from windfall. 



D. Disadvantages: 



I. Scattering operations. 



II. Type is not applicable to light demanders. 



III. Hypermature trees must be left in the woods until the 

 strips, after many years, may approach them. 



IV. Points of attack from which cutting may proceed are apt 

 to be lacking, unless the forester, helped by th.^ configuration of 

 the ground, is able to maintain a large number of narrow cutting- 

 series. 



Paragraph LV. The advance growth ^roup type 

 of natural seed regeneration. 



A. In nature, advance growth, usually appears in small 



bunches or in groups, for the reason that there is always a chance- 

 for many seedlings to sprout and develop on a spot where light, 

 humidity and soil allow a single individual to make a start alone. 

 In the primeval Avoods, groups of advance growth formed by shade 

 bearing species are almost invariably at hand. Even light de- 

 manders may form small groups of advance growth in spite of a 

 superstructure overhead, provided that the soil is strong enough to 

 support them. 



Such groups, freed from the trees superstructing them, will 

 develop one or a number of saplings which in turn and in course 

 of time may yield one or a few poles promising to grow into trees- 

 of a loggable size. 



Very frequently the groups are formed not under tlie leaf 

 canopy of the parent species, but imderneath another species acting 

 as a step-parent. 



Indeed, step-parents of a rather selfish kind, inimical to the 

 children, are frequently encountered in tree life, handicapping and 

 killing the young progeny thirsting at their feet for light and rain. 



The endurance of advance growth living under adverse condi- 

 138 



