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Hui Kiew Law

Document Type

Thesis - University Access Only

Award Date


Degree Name

Master of Science (MS)

Department / School


First Advisor

Wayne Ellingson


Although studies have been conducted to analyze the effects of delaying cull cow sales, this research aims to update the recent studies, namely studies by Yager, and Shane and Ellingson. The objectives of this project were: 1.) To derive least cost rations for selected rates of gain by investigating the feed energy to live weight gain relationships for mature cows. 2.) To provide analysis as to the length of time cows should be held to maximize profit potential. A relationship of feed energy to live weight gain for cull cows as derived in Chapter 3 is; NEg = 0.075 W0.9653 g1.0314 where NEg is the net energy available for gain in megacalories, W is cow weight in kilograms and g is daily gain in kilogram per day.

Library of Congress Subject Headings

Beef cattle -- Marketing
Beef cattle -- South Dakota -- Marketing




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