Regional Symposium on wheat and triticale

africa africa central africa south of sahara afrique afrique au sud du sahara afrique centrale agronomic characters breeding breeding methods central africa cereales cereals clima climat climate condiciones ambientales condition de milieu crops cultivos cultivos de grano disease resistance economic plants environment environmental conditions environnement essai fertilidad del suelo grain crops medio ambiente methode methods multiplication des plantes pepiniere plant nurseries plant production plant propagation plantas plante plante de culture plants production productividad productivity profitability propagation materials pruebas recherche rendement rendimiento rentabilidad research resistance to injurious factors resistencia a la enfermedad seed selection semence semillas site factors soil fertility taxa taxon taxonomia taxonomie taxonomy trials trigo triticale variedades varieties viveros wheats yields