The development and evaluation of a self instructional programme in the theory of herd improvement : With particular reference to growth rate in beef cattle : A thesis submitted in partial fulfilment of the requirements for the degree of Master of Agricultural Science in the University of Canterbury [Lincoln College]

Abstract

In recent years, the National beef herd has expanded rapidly* as graziers capitalize on investments made in land clearing and pasture improvement. But, while production per acre may have been raised, little progress has been made in herd improvement. Investigations of the genetic and economic properties of the characteristic "growth rate (rate of gain) in beef cattle" indicate that profitable gains may be expected in many commercial herds through simple mass selection. A brief review of research into these properties follows.