Abstract

Saw timber output (STO), ratio of sawnwood volume to roundwood volume, from 7-year-old straight-boled trees of Acacia auriculiformis was determined. The diameter at breast height (DBH) varied widely and the larger diameter (0. 20 m) trees had sawnwood volume nearly four times that of smaller diameter (0. 10-0. 15 m) trees and twice that of medium diameter (0. 15-0. 20 m) trees. The sawnwood outputs from small, medium and large diameter trees were 36. 4, 43. 3 and 48. 1, respectively. Regression analyses indicated that there was a highly significant relation between DBH and sawnwood output, with a high r2 value of 0. 996. However, only 51. 4 of the variation in STO could be explained by DBH