Dairy cattle (3) protéine (2) azote (2) modèle (2) lait (2) méthane (2) nutrition animale (2) analyse (2) gaz à effet de serre (2) émission (2) Animal feeding (2) Urine (2) Paper (2) Nitrous oxide (2) Nitrogen excretion (2) Nitrogen (2) Milk (2) Methane (2) Forage (2) Feces (2) Example (2) Conversion (2) Climatic changes (2) Animal nutrition (2) Analysis of variance (2) Feces (2) Analysis (2) Time (1) Social sciences (1) Matter (1)