Abstract

Variations in wood density, fibre length and percentage of bark and heartwood were determined in samples cut at b.h. from 5 trees each of (a) Eucalyptus grandis, (b) E. pellita, (c) E. camaldulensis and (d) E. tereticornis. Wood density and percentage of bark were highest in (c) and lowest in (b)wood density of (d) was n.s.d. from that of (c) . Fibres were longer in (a) and (b) than in the other 2 speciesshortest fibres were in (d) . In each species, fibre length increased from pith to bark by about 27-37. Percentage of heartwood was highest in (a) and lowest in (d) . Analysis of variance showed that, with the exception of percentage of bark, between-species variation was significant but between-tree variation within species was n.s.d. Tree ht. was related to wood properties to a greater extent than was d.b.h., although no consistent relation was found