io8 Forestry Quarterly. 



promote slips while deforestation frequently does." The re- 

 viewer, however, has noticed an interesting exception to this 

 rule in the French Alps where in a certain instance the forest 

 acts as a sponge and tends to promote land slips by concen- 

 trating a large weight of water upon a thin subsoil which slides 

 upon the rock foundation. Here, one of the means of attack 

 to prevent a land slide is to cut the forest. This is, of course, 

 an extreme measure. 



T. S. W., Jr. 



Indian Forester, November, 1913, p. 551. 



SILVICULTURE, PROTECTION AND EXTENSION. 



Frombling contends that the uneven de- 

 Root velopment of individuals in a dense crop 



Competition is not, as modern silviculturists claim, a 



vs. matter of root competition rather than of 



Predisposition. individual predisposition. For, he says, 

 since the raw humus, which in time nor- 

 mally is transformed into assimilable substance, accumulates in 

 the dense stand under the protective shade, it furnishes ample 

 food, and root competition can only be for food. Competition 

 for room can also not be the cause of uneven development or 

 thinning out of stands, for just the species with characteristic 

 tap roots, oak and pine, which get their water supplies from 

 the depths, thin out most surely, while on the other hand the 

 species' with shallow roots, spruce, fir, beech, thrive and keep 

 dense in close crown cover, although here root competition 

 would be expected. He calls root competition a most dangerous 

 term. 



Welche Rollc spielt die Wurzelkonkurrens im Haushalte des Waldes. 

 Forstwissenschaftliches Centralblatt, April, 1913, pp. 170-175. 



Now that there is a definite revolt broken 

 Extensive out in German forest circles against the 



and old clear cutting method with artificial re- 



Intensive generation, practised so extensively, espe- 



Management. cially with pine. Dr. Endres' summary of 

 the advantages and disadvantages of in- 

 tensive and extensive management is very timely. 



