| a three year field study of preconditioning native illinois beef calves sold through a cooperative marketing association--1969 to 1971. | during the fall of 1969, 1970 and 1971, central illinois practitioners preconditioned (pc) 1,576 beef calves at a cost range of $3.02 to $4.72. the pc program included weaning calves 30 days before sale, having calves eating grain from a bunk and drinking from a tank, vaccinated against blackleg, malignant edema, infectious bovine rhinotracheitis (ibr) and bovine parainfluenza virus (pi3). calves were tagged in the right ear with the green certified preconditioned for health (cph) tag of the ame ... | 1973 | 4270429 |