[Twenty-fourth laying test: 1. Influence of pullet rearing conditions and of laying-hen environment on egg quality. 2. Variations in hen weight and in the lipid content of their livers in function of their place in the cage]

battery husbandry calidad crianza en el suelo egg characters floor husbandry foie fresh eggs gallina ponedora huevos frescos layer chickens laying performance lipid content liver oeuf frais performance de ponte peso poids poule pondeuse quality rendimiento en la postura teneur en lipides weight