This trial was made up of 32 provenances of the species Acacia albida, A. nilotica, A. senegal, Prosopis chilensis, P. cineraria and P. pallida. The provenances represented a mixture of exotic and autochthonous origins, being from India, Pakistan, Chile and Peru. The trial was established with a spacing of 3 x 3 metres in 1985 and assessed after 6 years in 1991. Different growth parameters were measured and subjected to analyses of variance and multivariate analyses.
Survival of most provenances was poor, especially for A. albida and P. cineraria, where only one tree survived despite the fact that P. cineraria is native to the area. P. pallida had the highest survival with values varying between 30 and 90 %. This was also reflected in the dry weight production, where P. pallida took the lead. The best provenance of this species had produced 10 t ha-1 at the assessment, corresponding to 1.7 t ha-1 y-1. Overall the results indicate that the most promising species is P. pallida, with some provenances of A. nilotica and A. senegal having a slower but still satisfactory growth.
Within the species there were few significant differences. However, for A. nilotica and A. senegal results indicated that the most productive provenances in terms of biomass were the local provenances. For P. pallida, two groups of provenances were included, one from northern and one from southern Peru. There was more variation in the northern than in the southern group.