Effects of diet protein level and forage source on energy and nitrogen balance and methane and nitrogen excretion in lactating dairy cows.
C.K. Reynolds, L.A. Crompton, J.A.N. Mills, D.J. Humphries, P. Kirton, Alejandro Enrique Relling, Tom H. Misselbrook, D. R. Chadwick, D. Ian Givens
Abstract