Found inside – Page 60Other lichens were much more abundant , but their height seemed considerably restricted when compared with the lichens of black spruce forests . Annual growth rates of “ reindeer lichens ” have been of great interest for several years .
Found inside – Page 44Considerable variation in growth rate is evident in half-sib families of black spruce within restricted geographic areas. Morgenstern (1974) examined 20 seedling families through age 9, and found that family height varied from 88% to 112% of ...
Found inside – Page 208O 200 an 0 0.000 0.100 0.600 0.700 0.200 0.300 0.400 0.500 GROWTH RATE ( DBH / AGE ) Fig . 2 . REFERENCES CITED Stemwood Density As A Function of Growth Rate in Black and white Spruce ( B.C. ) 1 . 1000 • BLACK SPRUCE ...
Found inside – Page 27GROWTH AND YIELD Black spruce is a small and slow - growing but moderately long - lived tree ( fig . 19 ) . A height of 85 feet is exceptionally tall for ...
Found inside – Page 307Dense stands of second - growth spruce may produce cones when 35 years old ... Red spruce seed falls at the rate of 3.9 feet per second in still air ( 26 ) ...
Found inside – Page 868Stem volume of white spruce seedlings over time for weedfree ( WEED ) , site preparation ( SIPR ) , and untreated ( UNTR ) ... For 15 - year - old black spruce in Ontario , Hoepting et al . ... Some studies have indicated that spruce height growth will decline with less than 40 % light transmission ( Lieffers and Stadt 1994 ; Man ...
Found inside – Page 182Changes in radial growth rate for black spruce ( Picea mariana ) and concurrent changes in climatic conditions from 1910 to 1979 , Red Lake peatland ...
Found inside – Page 26Black Spruce north - central region , old - growth stands have various ... On both lakebed and filled - lake sites , the growth rate of black spruce is ...