1Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural (IRNAD), Sede Andina, Universidad Nacional de Río Negro (UNRN) and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Mitre 630, CP 8400 San Carlos de Bariloche, Río Negro, Argentina
2Centre for Agri-Environmental Research, School of Agriculture, Policy and Development, University of Reading, Reading, UK
3World Agroforestry Centre, Nairobi, Kenya
4Department of Agronomy, Iowa State University, Ames, IA, USA
5School of Biological Sciences, University of East Anglia, Norwich, UK