Author： Kaufman C. M.
Publisher： Society of American Foresters
ISSN： 0015-749X
Source： Forest Science, Vol.23, Iss.2, 1977-06, pp. : 217-226
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Abstract
The growth of horizontal root tips, diameters, and leaders of four half-sib families and a random seedlot of planted slash pine was studied relative to environment for the second and third years in the field. Environmental parameters current with growth and 1 and 2 weeks previous were used. All factors showed importance in varying degree; but soil moisture, minimum air temperature, minimum relative humidity, and radiation predominated in the equations. The effect of one or the other varied among the plant parts and from season to season. The growth-environment relationships varied among families. Within families, seasonal growth relationships of roots and diameters were linear. There were close exponential relationships between leaders and diameters; relationships between leaders and roots were also exponential but much less pronounced. Forest Sci. 23:217-226.
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