470 Forestry Quarterly. 



the management, it must not become the master and demand 

 forms, because they are easier to obtain or to judge. 



Ueber naturliche Verjungung. Forstwissenschaftliches Centralblatt. 

 Apr., 1914, pp. 181-195. 



Forstmeister Bauer (Bavaria), beUeving 

 Natural that the spruce is one of the species which 



Regeneration is adapted to natural regeneration and has 



of large areas under such management comes 



Spruce. to the conclusion that only on I and II 



site is this method of regeneration tech- 

 nically and financially successful. On 

 poorer sites, natural regeneration remains poor, so that, if no 

 thinning is done (which is expensive) in 50 years only bean and 

 hop poles are found, and at 30 years stands are hardly over man- 

 height, while 10 year old plantations side by side have 

 reached that height. He recites the disadvantages of natural re- 

 generation on poor and medium sites ; enormous loss in incre- 

 ment ; loss through poorer values of the wood product ; great 

 cost of cultural measures to remedy these defects ; more punky 

 wood due to injuries received in gradual removal of timber and 

 reduction of workwood per cent; execssive cost in moving ma- 

 terial from seeding area which alone would pay for planting. 



Technisches und Hnanzidles Vcrsagen der Natur vrjiingung in reinen 

 Pichtenbestdnden auf Boden mittlerer. Bonitat. Forstwissenschaftliches 

 Centralblatt, Oct., Nov., 1914, pp. 520-522. 



Dr. Wimmenauer compares the produc- 



Production tion of mixed stands of beech and pine, 



of beech and oak, beech and larch by ascer- 



Mixed taining the cross section area per cent in 



Stands. which each participates in the composition 



and compares their volume proportionately 



to what the normal yield tables for the 



single species calls for. He finds beech and oak produce more in 



pure stands if the participation of oak exceeds 2 per cent. In 



the mixture of pine and beech similarly an admixture of 50 per 



