Proposal to use time spent chewing as an index of the extent to which diets for ruminants possess the physical property of ... in cows receiving complete diets containing straw and concentrates in different proportions . proportions .

The data presented herein are taken in part from the junior author's thesis presented to the Graduate School of IICA as a partial fulfillment for the Master of Science degree . ** Berrios ' present address is : Escuela Nacional de ...