@inproceedings{orgprints6461,
           title = {How should a hen run be structured so that it is used evenly by laying hens ?},
          author = {Esther Zeltner and Helen Hirt},
            year = {2004},
        keywords = {poultry, hen run, structuring elements, Biogefl?gelhaltung, Gr?nauslauf, Strukturierung},
             url = {http://orgprints.org/6461/},
        abstract = {The aim of this study was to obtain an even use of the hen run with structures as an uneven use leads to a nutrient and heavy metal overload on the frequently used areas. In particular, we looked at the preference of hens for a certain kind and amount of structuring elements.}
}