Stepwise Reduction of Dietary Phosphorus in Diets for Piglets and Fattening Pigs of Different Genetic Origin Housed under Various Station Environments—A Ringtest gan Jochen Krieg, Gerhard Stalljohann, Michael Oster, Ralf Pfuhl, Bernd Reckels, Wolfgang Preissinger, Manfred Weber, Andrea Meyer, Dieter Feuerstein, Stephan Schneider

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