804 JOURNAL OF FORESTRY 



deeper green, but apparently no healthier than that of the others. 

 Transplanting reduced the height growth of both fertilized and unfer- 

 tilized plants. The conclusion is that fertilization of young spruce with 

 nitrates alone is not profitable, but that complete fertilization with 

 nitrates and the other fertiHzers is advantageous in cases where tall 

 planting stock is desired at an early age. The author does not entirely 

 agree with results obtained by Moller and Albert. W. N. S. 



Helbig, Maximilian. Zusammengcfdsste Ergebnisse der Karlsruher Sticks- 

 toffilngnnsversuchc mit Fichtcn, Hire Beicertung und Stellung su fremden Ver- 

 suchsergebnissen. Forstwiss. Centralbl., 42:262-267, 1920. 



While coppice under standards is undoubtedly 

 A Trial of the most widely used method of treatment in 



Broadleaf France, it has long been recognized that it falls 



Selection Forest far short of producing the maximum amount of 

 timber. The classic method of converting such 

 stands into high forest is too slow, too complicated, and involves too 

 great a sacrifice of present returns to be practicable. A more feasible 

 method, which is already virtually in use in many places, is to establish 

 by relatively frequent improvement cuttings a selection high forest in 

 which the number of trees is inversely proportional to their diameter. 

 This method, with cuttings about every fifteen years, makes it pos- 

 sible to favor the most promising seedlings and saplings, to remove 

 mature trees most advantageously, and to establish a high forest with 

 a good yield of timber without sacrifice of present revenue. Condi- 

 tions vary so widely that no set rules for applying it can be laid down, 

 and a thorough knowledge of silviculture is necessary to use it to ad- 

 vantage. S. T. D. 



Schaeffer. Un essai de futaie jardinee feuillve. Bull. Trimest. Soc. Forest, 

 Franche-Comte et Belfort, 13 :239-247, 1920. 



The Colorado blue spruce plantations in Nor- 



Suitability of way show promise that this tree will help solve 



Piscea Pnngens the problem of extending timberline northward 



in Forestry and upward where the native trees do not thrive. 



It may also be used to advantage on the poorer 



wind-swept cities near the coast. The plantations are now from 12 to 



20 years old and are everywhere on precarious sites superior to the 



other species. J. A. L. 



Ruden, Ivar. Picea pungens. Dens anvendelighet i vort skogbruk. Tidsskrift 

 for Skogbruk, 29:39-47, 1921. 



