Khampa, S. and Wanapat, M. 2006. Supplementation of Urea Level and Malate in Concentrate Containing High Cassava Chip on Rumen Ecology and Milk Production in Lactating Cows. Pakistan Journal of Nutrition. 5, 6 (Oct. 2006), 530–535. DOI:https://doi.org/10.3923/pjn.2006.530.535.