[Analysis of the working environment by grass and silage handling in cattle houses]

aliment pour animaux alimentos para animales alojamiento de animales analisis analyse analysis animal housing buildings cattle sheds cobertizos para el ganado condiciones de trabajo condition de travail construcciones crops cultivos economic plants ensilaje ergonomia ergonomics ergonomie escandinavia europa europe feed crops feed grasses feeds gramineas graminee grasses handling housing logement logement des animaux manutention methode methods noruega norway plantas plantas forrajeras plante plante de culture plants safety scandinavia scandinavie seguridad silage vivienda working conditions zootechnie zootechny zootecnia