-5- It should be noted that these calculations are only approximations based on comparisons of results of this one trial. The estimates are based only on feed costs and do not include non-feed costs (estimated $0.10 per head daily). It should also be pointed out that results of Lot 22 (moderate grain) were not included in these comparisons because of poor performance by the group in Phase II which would have made feed replacement estimates unreliable in com- parison with that of other groups. Finally, it might be generally stated that corn was worth from 3.48 to 4.91 times as much as corn silage on a wet weight basis, and 1.71 to 2.37 times as much as corn silage on a dry matter basis, depending on which groups were compared. A further study will be conducted in 1973-1974. ACKNOTLEDGEEIIT Appreciation is expressed to A. Duda & Sons for furnishing calves for this study. 400 copies