Performance of exotic breeds in the tropical environment: a case study of Agege Dairy Farm [dairy cattle, Nigeria]

africa africa south of sahara afrique afrique anglophone afrique au sud du sahara afrique occidentale agentes nocivos agotamiento por el calor agricultura agriculture anglophone africa animal animal domestique animal pour cuirs et peaux animal production animales animales de carne animals artiodactyla artiodactyle biometria biometrie biometry bovidae bovide bovin bovin laitier bovine bovines cattle chemicophysical properties clima clima tropical climat climat tropical climate condiciones ambientales condition de milieu coup de chaleur dairy cattle dimension dimensions diseases domestic animals environment environmental conditions environnement facteur nuisible ganado ganado bovino ganado de leche heat exhaustion injurious factors livestock mammals measurement meat animals medio ambiente mesure methode methods milk production production production animale rumiante ruminant ruminants site factors systemic diseases tropical climate vertebrados vertebrates vertebre west africa