Sánchez-Duarte, Juan I., and Álvaro García. “Ammonia-N Concentration in Alfalfa Silage and Its Effects on Dairy Cow Performance: A Meta-Analysis”. Revista Colombiana de Ciencias Pecuarias 30, no. 3 (July 24, 2017): 175–184. Accessed January 23, 2025. https://revistas.udea.edu.co/index.php/rccp/article/view/327487.