[The market for eggs from alternative husbandry: More illusion than reality?]

agricultura alternativa agriculture alternative alemania allemagne alternative agriculture battery husbandry consommation consumer prices consumo consumption crianza en el suelo crianza libre demand demanda demande effectif du cheptel egg production eggs floor husbandry free range husbandry gallina ponedora germany huevos layer chickens livestock numbers marche markets mercados oeuf poule pondeuse precio al consumidor production d'oeufs