Growth in Trees
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Jour. Forestry, 16: 677-689. 1918. Boerker, R. H. Rela- tion between height-growth of larch seedlings and weather conditions. Jour. Forestry, 16:861- 870. Dec. 1918.
30 GROWTH IN TREES.
variations. The effects of humidity and temperature will be presented in a later section. A core, taken from this tree by Dr. A. E. Douglass, showed 74 layers or rings which varied from 1 to 5 mm. In thickness, that for 1918 and for 1919 being about the same thickness as the measurement for 1920 just given.
MEAS...UREMENTS OF A SPRUCE AND A FIR.
The Douglas fir (Pseudotsuga taxifolid), at the Alpine Labora- tory on the slopes of Pikes Peak to which the dendrograph was attached, was nearly 36 cm. In diameter and the instrument had an amplification of nearly 16 times. The buds were developing rapidly when observations were begun on June 17, at which time in- crease of the diameter of the trunk was visible in the daily variations. Growth was already in progress. The increase continued at a low rate until July 21, at which time a total gain of 2 mm.
What to read after Growth in Trees?
You can find similar books in the "Read Also" column, or choose other free books by Daniel Trembly Macdougal to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Jour. Forestry, 16: 677-689. 1918. Boerker, R. H. Rela- tion between height-growth of larch seedlings and weather conditions. Jour. Forestry, 16:861- 870. Dec. 1918.
30 GROWTH IN TREES.
variations. The effects of humidity and temperature will be presented in a later section. A core, taken from this tree by Dr. A. E. Douglass, showed 74 layers or rings which varied from 1 to 5 mm. In thickness, that for 1918 and for 1919 being about the same thickness as the measurement for 1920 just given.
MEAS...UREMENTS OF A SPRUCE AND A FIR.
The Douglas fir (Pseudotsuga taxifolid), at the Alpine Labora- tory on the slopes of Pikes Peak to which the dendrograph was attached, was nearly 36 cm. In diameter and the instrument had an amplification of nearly 16 times. The buds were developing rapidly when observations were begun on June 17, at which time in- crease of the diameter of the trunk was visible in the daily variations. Growth was already in progress. The increase continued at a low rate until July 21, at which time a total gain of 2 mm.
What to read after Growth in Trees?
You can find similar books in the "Read Also" column, or choose other free books by Daniel Trembly Macdougal to read onlineMoreLess
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