Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)

Department / School

Animal Science


The economy of much of our Great Plains region depends upon the efficiency with which we use its most important crop--grass. Since over 75 percent of the feed of all beef cattle and sheep is grass, anything that can be done to increase its value as feed for livestock is of tremendous importance to the wealth and economy of the nation. In addition to the importance of grass to the Great Plains regions, it is playing an ever more important role in the economy of the southeastern states and even in the corn belt. With higher prices for livestock and the increased cost of grain farming, many farmers in the corn belt are converting more and more of their land to grassland for the production of livestock. Recent educational work to encourage planting of grass mixtures and grass and legume mixtures for building the soil, as well as getting cash return from the land as pasture or hay, has also been added considerable importance ti the grass and hay crop of the nation. The study reported herein was conducted to determine the digestibility of good quality and poor quality prairie hay when supplemented with varying levels of protein. Soybean mean and urea were used to determine their comparative value at various levels with the two qualities of hay. Both cattle and sheep were used in the experiments to obtain information on their comparative ability in utilization of these hays if different quality and in the use of the various levels of the two supplements tested.

Library of Congress Subject Headings

Cattle -- Feed utilization efficiency
Sheep -- Feed utilization efficiency


Includes bibliographical references



Number of Pages



South Dakota State College


No Copyright - Non-Commercial Use Only