Effects of spacing on yield and some wood properties of Cupressus lusitanica at Rongai, Northern Tanzania
1992
Malimbwi, R.E. | Persson, A. | Iddi, S. | Chamshama, S.A.O. | Mwihomeke, S.T.
A Cupressus lusitanica spacing experiment located at Rongai, Northern Tanzania was assessed at the age of 19 years. The experiment was planted at square spacings of 1.13 m, 1.46 m, 1.88 m, 2.43 m, and 3.14 m. Other than pruning to 1.8-2.0 m at the age of 3 years and routine weeding, the experiment did not receive any other treatment. Assessment was made of survival, branch diameter, height, basal area, volume production, heartwood content, basic density and wood strength. Height, basal area, merchantable volume, basic density, heartwood content, modulus of elasticity, modulus of rupture and compression parallel to grain were not significantly affected by spacing. All other variables were significantly affected. Mortality decreased with increasing spacing while branch diameter and breast height diameter increased. Total volume decreased with increased spacing. The implications of these results on future management of C. lusitanica in Tanzania are discussed.
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