%0 Journal Article %T Methods and software tools for agro-ecological evaluation at farm level: the livestock component within the SIPEAA project %A M. Speroni %A A. Annunziata %A E. Basile %A G. Pirlo %J Italian Journal of Animal Science %D 2010 %I PAGEPress Publications %R 10.4081/ijas.2005.2s.187 %X Livestock farms need to adapt to social and economics changes. Often, farmers must take decision in order to: - remain competitive, meanwhile market and public aids change; - reduce impact on environment. Improvement of efficiency seems to be the only way to conciliate these two different needs. Livestock farm are very complex systems involving physical and biologic components. %K software %K models %K dairy cows %K nitrogen excretion %U http://www.aspajournal.it/index.php/ijas/article/view/685