Beef production from forage based diets. Results from a field experiment [indoor feeding, ley forage, mariginal costing]

alimentos concentrados beef cattle bovin de boucherie bulls climatic change concentrates consommation alimentaire (animaux) consumo de piensos contaminantes crecimiento croissance economic analysis ensilage (produit) ensilaje exploitation agricole familiale family farms feed consumption feed conversion efficiency foin ganado de carne growth hay heno meat production peso poids polluant pollutants production costs production de viande silage taureau toro weight