The simplest and most convenient method of measuring the nutritive value of proteins is by an assessment of the protein efficiency ratio (P.E.R.) (gain in weight in g/g protein eaten). This measurement has been frequently criticized and, in fact, Mitchell (1924) stated that simplicity was its only recommendation. There are two main drawbacks to the method. Firstly, P.E.R., as measured on any pa...

nutritive value of rumen epithelial scraping (rep) was assessed using in sacco and in vivo procedures. concentrates were so formulated that 0% (a), 35% (b), 70% (c), and 100% (d) of soybean meal (sbm), were replaced (weight for weight) with rep. in a completely randomized design, 16 west african dwarf (wad) goats were randomly allocated to the experimental diets to assess feed intake and digest...