Crop residue based densified total mixed ration a user-friendly approach to utilise food crop by-products for ruminant production / Walli, T. K Garg, M. R Makkar, Harinder P. S Food and Agriculture Organization of the United Nations Ruminants Crop residues as feed 636 FOO 2012 Rome : Food and Agriculture Organization of the United Nations, 2012 2012 Text 1 online resource (vi, 33 p.) : http://www.fao.org/docrep/015/i2728e/i2728e00.htm FAO animal production and health paper,