CARDI/IDRC Milk production system (Guyana) project: Phase III - second annual report

abonos nitrogenados balle de riz bovin cardi carga ganadera cascarilla de arroz cattle conservation contenido de materia seca contenido proteico digestibilidad digestibility dry matter content feed grasses feeding systems ganado bovino germoplasma germplasm guyana milk production modele modelos models nitrogen fertilizers pastizales pastures pests of plants petite exploitation agricole plagas de plantas production de semences protein content ravageur des plantes rice husks seed production small farms stocking density taux de charge technique d'alimentation