This trial was made up of 40 provenances of species from the dry tropics, including Acacia aneura, A. cowleana, A. holosericea, A. nilotica, A. senegal, A. tortilis, Prosopis chilensis, P. cineraria and P. juliflora originating from Australia, Asia and Africa. The trial was established with a spacing of 4.5 x 4.5 metres in 1984 and assessed after 10 years in 1994. Different growth parameters were measured and subjected to analyses of variance and multivariate analyses.
The fastest growing provenance (P. juliflora) had an increment rate of 1.1 m2 ha-1 y-1, corresponding to a dry weight production of 5.6 t ha-1 y-1. Analyses of species differences demonstrated that the species were different in several aspects. A. aneura had a poor survival and problems with the stability. Within species, convincing evidence of differences were found in Acacia aneura, A. nilotica, A. tortilis and P. cineraria. In particular, a large variation was found in A. tortilis.