464 JOURNAL OF" PORESTRV 



The author, in concluding his discussion of this species for planting 

 in Pennsylvania, does well to state that "there seems to be no special 

 need for planting it (Scotch pine) extensively in Pennsylvania for for- 

 estry purposes. It may, however, be advisable to continue the planting 

 of it until we understand the silvical requirements and preferences of 

 the native pines better, especially upon sites with adverse growth con- 

 ditions." 



The article is well illustrated with photographs from American and 

 European sources. 



J. W. T. 



Forest Leaves, Vol. XVI, December, 1917, pp. 87-90. 



Many instances of apparent success up to the 

 . Reforestation pole stage have failed later, for reasons which 

 of cannot be explained. The author (Forstmeister 



Waste Lands Krause) concludes that the first planting on 

 waste lands is only a preparation which in a few 

 decades must be followed by final reforestation. Nature aflforests 

 gradually by different successions, and we must follow the same pro- 

 cedure. He therefore recommends a great reduction in the cost of first 

 planting or sowing, not aiming to establish a full stand. 



Aufforstung von Oedldndereien. Zeitschrift fiir Forst und Jadgwesen, January, 

 1915, pp. 29-46. Reviewed in Forestry Quarterly, Vol. XIII, pp. 29-46. 



Experiments with spruce in Wermdorf, Sax- 

 Spacing ony, begun 50 years ago. show a great superiority 



of of planted plots over those sown. The number 



Spruce of stems and total basal area were greatest on 



broadcast sowing, but here the superiority ceased. 

 Of different spacings, the greatest total volume was reached at 2^ feet, 

 but the greatest timber-wood production at y/^ feet. The value pro- 

 duced, however, found by multiplying diameter with "stout-wood" 

 production, is greatest for 4}4 feet. The writer adds : "Who can 

 doubt the superiority of planting over natural regeneration?" Height 

 growth as well as diameter is favored by open position. The form 

 factors indicate that shaft form also is not best developed in close 

 stands, but in a more or less open position. 



One scientific fact of note resulting from the experiment is the unre- 

 liability of basal area as a basis of judgment of production. 



Forstliche Tagesfragen. Tharandter Forstliches Jahrbuch, 1915. Vol. 66, pp. 

 129-215. Reviewed in Forestry Quarter!}-, Vol. XIII, No. 3, pp. 387-389. 



