Production efficiency of nitrogen components of Czechoslovak provenance in intensive fattened bulls

absorption de substances nutritives bulls costos costs crude protein engorde engraissement faba beans farine pour animaux fattening feed conversion efficiency feed intake feed meals gain de poids ganancia de peso guisante haba harina de colza harina para piensos melasse melaza molasses nutrient uptake nutritive value peas peso poids pois prise alimentaire (animaux) proteina bruta raciones rapeseed meal ration rations soybean meal taureau toro tortas de soja tourteau de colza tourteau de soja urea uree valeur nutritive valor nutritivo weight weight gain