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    Author(s): Steven A. Knowe; G. Sam Foster; Randall J. Rousseau; Warren L Nance
    Date: 1998
    Source: Forest Ecology and Management. 106: 115-123.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (391 B)


    Data from an eastern cottonwood clonal mixing study in Mississippi and Kentucky, USA, were used to test the effects of planting locations and genetics (clonal proportions) on height-age and height-d.b.h. functions. Planting locations, which accounted for 5.6 percent of the variation in observed dominant height growth (p = 0.0001), were more important than clonal proportions, which accounted for only 1.0 percent of the variation (p = 0.0077). Interactions between clones in mixtures were not significant ( p = 0.9178), but three cases of overcompensation and undercompensation paralleled those observed for basal area. Planting locations were associated with differences in maximum height in the height-d.b.h. function and clonal proportions were associated with differences in height of trees with smaller than average d.b.h. Although statistically significant, the effects of planting locations and clonal proportions were not important enough to incorporate into the final height-d.b.h. model.

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    Knowe, Steven A.; Foster, G. Sam; Rousseau, Randall J.; Nance, Warren L. 1998. Height-age and height-diameter relationships for monocultures and mixtures of eastern cottonwood clones. Forest Ecology and Management. 106: 115-123.

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