Wood Density and Growth Rate of <i>Pinus elliottii</i> and <i>Pinus taeda</i> Clones Planted on Two Sites in the Eastern Transvaal / HOUTDIGTHEID EN GROEITEMPO VAN PINUS ELLIOTTI- EN PINUS TAEDA-KLONE OP TWEE GROEIPLEKKE IN OOS-TRANSVAAL GEPLANT
Annotatsiya
ABSTRACT Eleven years old clonal plantings of Pinus elliottii and P. taeda established on two different sites were sampled to study the variation in wood density. For both species clonal differences were highly significant. Wood density at the high altitude site was consistently lower than that of the same clone at the lower altitude site. Wood density was not correlated with growth rate per site. It was further found that site x clone interaction with regard to wood density was absent, but two P. elliottii clones showed a definite site x clone interaction in respect of diameter growth rate. Density gradient differed largely between the two sites and this difference could not be explained.