CARDI/IDRC Milk production systems (Guyana) project: Phase III - First Annual Report

acid soils animal performance bovin laitier brachiaria humidicola cardi carga ganadera dairy cattle desmodium ovalifolium echinochloa pyramidalis feed grasses feed legumes feeding systems fertilisation fertilizer application ganado de leche gestion de projet guyana leguminosas forrajeras metabolism metabolisme metabolismo milk production modele modelos models nutritive value pastizales pastures petite exploitation agricole profitability project management rentabilidad saline soils small farms sol acide sol salin stocking density suelo salino taux de charge technique d'alimentation valeur nutritive valor nutritivo