tiOTANlCAl 



JOURNAL OF FORESTRY 



Vol. XV NOVEMBER, 1917 ^o. 7 



SOME FACTORS INFLUENCING THE REPRODUCTION OF 

 RED SPRUCE, BALSAM FIR, AND WHITE PINE 



By Barrington Moore 

 contents 



Page Page 



Purpose of investigation 827 The vegetation — Continued. 



Locality 827 Minor associations 838 



Location 827 Succession 838 



Climate 828 Experiments 839 



Geology 828 Soils 840 



Soil , 830 Physical properties of soils 840 



The vegetation 830 Chemical properties of soils 841 



General 830 Results 843 



Spruce association 831 Observations 8.si 



WTiite-pine association 833 Root systems 8s i 



Cedar association 835 Interception of precipitation by spruce 



Pitch-pine association 836 crowns Ss i- 



Gray birch-aspen association 837 Reproduction Ss-^ 



PURPOSE OE INVESTIGATION 



The purpose of the present investigation was to learn something 

 concerning the factors governing the reproduction of the more impor- 

 tant coniferous trees of northern New England. The study was. con- 

 fined to a single locality, because detailed investigations of small areas 

 will yield fundamental knowledge of forests more quickly than general 

 studies of large areas. 



LOCALITY 

 Location 



The study was carried out on the island of Mt. Desert, the largest of 

 the many islands off the southern coast of Maine. This island, on ac- 

 count of its location and unusual topography, offers more of interest 

 to ecologists and foresters than almost any other area of the same size 

 in eastern United States. Mt. Desert is roughly oval in shape and 

 almost cut in two by a long, narrow inlet. It is approximately 12 miles 

 wide by 16 miles long. 



827 



