Inthapanya S, Preston T R and Leng R A 2016: Ensiled brewers’ grains increased feed intake, digestibility and N retention in cattle fed ensiled cassava root, urea and rice straw with fresh cassava foliage or water spinach as main source of protein. Livestock Research for Rural Development. Volume 28, Article #20. Retrieved , from http://www.lrrd.org/lrrd28/2/sang28020.htm