[Use of different mathematical models and effect of milling and sieving on in situ rumen degradability of dry matter and nitrogen]

analisi statistica analyse statistique biodegradation biodegradazione comminution contenido de materia seca desmenuzamiento digestible nitrogen dry matter content ensilado ensilage (produit) fragmentation frammentazione insilato mathematical models modelli matematici rumination ruminazione setacciatura sieving silage statistical analysis tamisage tamizado