Models of sorghum and pearl millet to predict forage dry matter production in semi-arid Mexico. 2. Regression models

agua del suelo aliment pour animaux analyse statistique biomasa biomass biomasse cantidad de semilla requerida contenido de materia seca dry matter content eau du sol feeds forage modele modelos models pennisetum glaucum pennisetum typhoides piensos precipitation regression analysis soil water sorghum sowing rates statistical analysis