Seven-year results from a species and provenance trial at Meegahakiula in the mid-country intermediate zone.
Six acacia species (Acacia mangium, A. auriculiformis. A. crassicarpa, A. leptocarpa, A. polystachya, A. oraria), seven eucalypt species (Eucalyptus melanophloia, E. camaldulensis, E. torelliana, E. microtheca, E. crebra, and E. tereticornis and E. alba each represented by two provenances), and six other species (Casuarina cunninghamiana, Calliandra calothyrsus, Leucaena leucocephala, Tamarindus indica, Terminalia arjuna and Azadirachta indica) were included in the trial. Eleven other species failed either in the nursery or soon after planting. All the species/provenances were Australian except for some local representatives. The species were classified into three types, and the best performers in each identified, as follows. Trees of coarse form, suitable for fuelwood and occasionally for poles and timber were A. mangium, A. crassicarpa (with some qualifications) and A. auriculiformis. Trees of good form were mainly eucalypts, suitable for poles and low to high-grade timber. Eucalyptus camaldulensis showed some potential, but because of a general failure to protect the eucalypts from termite attacks, this result is inconclusive. Indigenous trees with good timber and non-timber values were Azadirachta indica and Terminalia arjuna.