Quesungual slash mulch agroforestry systems (QSMAS): improving crop water productivity, food security and resource quality in the sub-humid tropics - Castro, A.; Rivera Peña, Mariela; Ferreira, Oscar; Pavon, Jellin; Valladares, D.; García, E.; Amézquita Collazos, Edgar; Ayarza, Miguel Angel; Barrios, E.; Rondón, Marco Antonio; Welchez, L.A.; Rao, Idupulapati M. (International Center for Tropical Agriculture, 2007)