“…In some countries, the introduction of fast growing exotic species has been promoted by governmentsupported agricultural extension workers who expect exotic species to be more efficient than native species in improving farm productivity and reducing poverty (Dunn, 1991;Dewees, 1995;Schneider et al, 2014). In addition, the exotic tree species themselves often possess (or may be perceived to possess) more useful attributes than native species, such as faster growth rates, higher economic value, fewer pests, and reduced competition with the main crop (Kalinganire, 1996;Tavares et al, 1999;Lott et al, 2000;Takaoka, 2008b;Anglaaere et al, 2011;Tefera et al, 2014). Finally, the local legal frameworks may also play a role in promoting exotic species by withholding farmers' rights of ownership over native trees, thus making the latter trees less attractive to propagate for the future (Van Noordwijk et al, 2003;Ruf, 2011;Schroth et al, 2011).…”