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Thesis (M.S.)—University of Nebraska—Lincoln, 1967. Department of Animal Science.


Copyright 1967, the author. Used by permission.


Efficiency of feed conversion can be defined as the ratio of output of animal product to the input of feed. A common definition expresses feed efficiency in beef cattle in terms of the number of feed units consumed per unit of live gain or its reciprocal.

A major share of energy consumed is directed toward the maintenance of normal body functions and the activity of the animal. Energy in excess of maintenance can be utilized in productive processes. The efficiency with which the maintenance requirement and the productive processes are met depends upon several factors such as body surface area, environment, age, sex, type of ration, and genetic characteristics for tissue growth.

The essence of this study is the evaluation of differences in energy utilization between bulls and steers. In addition, an attempt was made to evaluate feed use separately for maintenance and the various components of live weight gain.

Advisor: Robert M. Koch