Report on the ccta/FAO symposium on savannah zone cereals - Dakar, Senegal, 29 Aug - 4 Sep 1962.

agricultura agriculture cereales cereals control de enfermedades cooperation cultural methods disease control economic distribution economic situation graine mais maize mijos millet millets mode de culture plant production production de semences recherche rendement rendimiento research sabanas savane seed production seeds selection semilla sorghum yields