[A model 6 hectare farm producing feed crops and bullocks for fattening [Portugal]]

aliment pour animaux boeuf buey bullocks cash flow costos costs crop yield effectif du cheptel feed crops feeds ferme pilote fincas experimentales heifers income ingreso en efectivo livestock numbers novilla piensos pilot farms plantas forrajeras portugal rendement des cultures rendimiento de cultivos renta revenu subsidies subsidios subvention