This trial was made up of five provenances of the genus Prosopis. The trial was established with a spacing of 4 x 4 metres in 1988, and was measured after 5 years in 1993. One provenance was from Chile (P. chilensis), and the rest (one provenance of P. glandulosa and three provenances with unknown species identity) were from Mexico.
The survival in the trial was below 10%, and there were no significant differences between the provenances in the analysed variables (survival, height and crown area). The largest provenance had attained an average height of 1.9 m. Based on the trial none of the provenances are recommended at Gonsé.