468 Forestry Quarterly. 



Norings plant holder, which insures the proper depth of setting, 

 and a firming tool. (See Illustration on page 483.) 



Der Zangenbohrer von Splettsiosser. Centralblatt f. d. g. Forstwesen. 

 June, 1909. Pp. 283-286. 



I 



A very interesting investigation has been 



Seed made by Prof. Toboleff reported in the 



Yield. Journal of the Imperial Forest Institute for 



1908, to ascertain the seed yield of spruce 



stands by means of sample plots, each containing 100 trees, which 



were under observation four years. The amount produced was 



not ascertained by direct count, but by gathering the cones from 



about ten per cent, of the tree number in seven to ten tree classes. 



The dominant trees, class I, II, III, and the two sub-classes of 



the last two, produced 98% of the total yield, class IV, although 



represented with 17% gave the other 2%, class V representing 



20% of the number yielded nothing. The contribution of each 



class per tree was in the proportion of 3, 2, 1, -J, o, for the five 



classes from I down. That is to say, a tree of class I would yield 



three times, of class II, twice that of a tree of class III. 



The seed yield of the single tree depends on development of 

 crown, size of cone, number of seeds in cone, size of seed, germi- 

 nation per cent, and age of tree. The largest yield of single trees 

 in each of the four classes were 2.3, .83, .167, .107 pounds of 

 germinative seed. 



A calculation showed in good years around one million seeds 

 per acre and 40,000 to the tree. 



Ueber den Samenbetrag der Fichtenbest'dnde. Zeitschrift fur Forst- u. 

 Jagdwesen. July, 1909. Pp. 477-479. 



The experiences in Germany with our own 

 Silvics species are accumulating, and naturally of 



of interest to us. In the Palatinate, this ex- 



White Pine. perience with White Pine in forest condi- 



tions is over a century old. Forstrat 

 Neblich reports: The natural reproduction of White Pine offers 

 no difficulties if begun at the proper time. In stands over no 

 years old, its regenerative power begins to decline. As regards 

 light requirements in the red sandstone district it is to be classed 

 with the tolerant species and its biologic characteristics place it 



