Pinus halepensis: an alternative for reforesting marginal fields in the Sierra Madre Oriental of northeastern Mexico.
A trial was established in 1986 at the Universidad Autonoma de Nuevo Leon, in the Sierra Madre Oriental of northeastern Mexico, with 5 provenances of Pinus halepensis and P. brutia, both Mediterranean species, and one provenance of each of P. eldarica (a Transcaucasian species) and P. pseudostrobus, a native species. Survival, total height and basal diameter were measured annually for 8 years. Survival was higher in the Mediterranean species than the native species. Of the introduced species, P. halepensis showed the greatest total height at all times, and had greatest diameter growth after 1988. Provenances of P. halepensis did not show statistical differences. The best provenance of P. brutia did not perform better than any provenances of P. halepensis, which is recommended for reforesting marginal, semiarid sites in the Sierra Madre Oriental.