[Agronomic and zootechnic research and the actual situation of the general technical services in the Economic Community of the Great Lakes Countries [Burundi, Rwanda, Zaire]]

agronomia agronomie agronomy animal health arroz de secano arroz irrigado breeding burundi caprin caprinos ciencias forestales cultivos alimenticios feed crops fitopatologia food crops foresterie forestry froment goats haricot commun ipomoea batatas irrigated rice kidney beans mais manihot esculenta manioc ovin ovinos papa patate douce pennisetum purpureum plant pathology plantas forrajeras plante alimentaire pomme de terre potatoes recherche research riz pluvial rwanda sanidad animal selection setaria (graminea) setaria (graminee) setaria (grass) sheep soja sorgho soybeans trigo tripsacum laxum triticale upland rice variedades varieties wheats zaire zea mays zootechnie zootechny zootecnia