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1986 South Dakota Beef Report, Department Of Animal And Range Sciences, South Dakota State University, Agricultural Experiment Station, South Dakota State University, Cooperative Extention Service, South Dakota State University

South Dakota Beef Report, 1986

We are pleased to present this, our first annual SDSU BEEF REPORT. It is a compilation of research reports and applied information relating especially to the beef cattle industry. The papers included in this report have been prepared by SDSU research and extension scientists, not only in the Department of Animal and Range Sciences, but also in Chemistry, Economics, Dairy Science, Plant Science and Veterinary Science. Since some of the projects from which results are reported are still in progress, the preliminary nature of the results should be recognized. For the reader's convenience, the articles included are grouped by specific …

G86-815 Reproductive Problems In Rams, Alan R. Doster, Dale M. Grotelueschen

University of Nebraska-Lincoln Extension: Historical Materials

Systematic examination of all males to be used for breeding can prevent reproductive failure, minimize nonpregnant ewes, and increase numbers of lambs born early during lambing season.

The importance of using only highly fertile, healthy rams in breeding programs cannot be overemphasized. This is especially true in the case of small producers where only one ram is required. The ram represents an often neglected part of sheep production.

G86-818 How To Use The Milk Progesterone Tests, Larry L. Larson

University of Nebraska-Lincoln Extension: Historical Materials

This guide discusses the basis for milk progesterone tests, using the test to confirm estrus, as an early indicator of pregnancy, and the availability and costs of kits. Milk progesterone test kits are now commercially available for on-farm use. Correct interpretation of the test results requires accurate estrous detection and good records. Properly used, these tests can help determine (1) if a cow is near estrus and potentially could conceive if bred, or (2) as an early indicator of pregnancy.

G86-820 How To Maximize Income By Managing Days Dry, Jeffrey F. Keown

University of Nebraska-Lincoln Extension: Historical Materials

This guide discusses the benefits of maintaining the optimum calving interval and offers suggestions for accomplishing this reproductive management technique.

Most dairy producers are aware that an optimum calving interval is 365 days. This is a normal lactation length of 305 days with a dry period of 60 days. This interval is often looked at as a goal to strive toward rather than a goal that must be reached to maximize income from the sale of milk.

G86-822 How To Estimate A Dairy Herd's Reproductive Losses, Jeffrey F. Keown

University of Nebraska-Lincoln Extension: Historical Materials

Remedies for herd losses caused by calving interval, dry periods, A.I. performance, and age at first freshening.

One of the major areas of lost income to the dairy producer is in the reproductive performance of the dairy herd. These losses are often overlooked because they are indirect costs. If producers could be given a monthly bill indicating the amount of money that improper reproductive management has cost them, then drastic changes would occur.

The majority of reproductive losses occur in the following areas:

1. Calving interval too long or too short.

2. Dry period too long or too short.

3. …