The gap between: present farm yield and the potential

agricultural development agronomic characters behaviour breeding cereales cereals comportamiento comportement constraints contrainte control de enfermedades control de plagas cropping systems crops cultivos cultivos de grano decision making disease control economic plants economic sectors extension extension activities fertilization fisiologia fitomejoramiento fonction physiologique grain crops irrigation mechanization methode methods motivation pest control physiological functions physiologie physiology plant breeding plant production plantas plante plante de culture plants production productividad productivity professional services profitability rendement rendimiento rentabilidad reproduction riego secteur tertiaire sector terciario service service professionnel services servicios servicios profesionales sistemas de cultivo technologie technology technology transfer tecnologia tertiary sector toma de decisiones transfert de technologie vulgarisation agricole yields