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Weekly Height Growth of Cottonwood

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During the second summer after planting, average weekly height growth of 72 sample trees of intensively cultured Populus deltoides Bartr. in southern Illinois ranged from zero in mid-April and early October to nearly 10 inches during the last half of July. The curve of current growth was bell-shaped and followed closely the curve of minimum air temperature. The cumulative growth curve was sigmoid. Soil moisture was plentiful in the deeper layers of alluvial soils, and the relatively low soil moisture in the shallow layers at the end of July corresponded with maximum height growth. Current growth was also related to weekly average and maximum air temperature but not to relative humidity, vapor pressure deficit, or tree height at the beginning of the summer. Most trees started height growth the last week in April, but the time when growth ceased ranged from the week ending August 17 to the one ending October 5. Half of the trees were still growing after September 14. Growth cessation was apparently under strong genetic control.
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Document Type: Journal Article

Affiliations: Staff Specialist, Pecos Ranger District, Santa Fe National Forest, Pecos, N. M.

Publication date: 1968-06-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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