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Ec89-219 1989 Nebraska Swine Report, M.A. Giesemann, E.R. Peo, A. J. Lewis, Duane Reese, J.D. Hancock, Murray Danielson, Marvin Rhodes, Merwin L. Frey, Alan R. Doster, Homer E. Connell, Donald G. Levis, Cindy Marolf, Edgar T. Clemens, Michael C. Brumm, Donald L. Ferguson, William Ahlschwede, Dwane R. Zimmerman, J.D. Kopf, Rodger K. Johnson, Thomas Socha, John Keele, Larry Young, Chris R. Calkins

University of Nebraska-Lincoln Extension: Historical Materials

This 1989 Nebraska Swine Report was prepared by the staff in Animal Science and cooperating departments for use in the Extension and Teaching programs at the University of Nebraska-Lincoln. Authors from the following areas contributed to this publication: Swine Nutrition, swine diseases, pathology, economics, engineering, swine breeding, meats, agronomy, and diagnostic laboratory. It covers the following areas: breeding, disease control, feeding, nutrition, economics, housing and meats.

G89-899 Weed Control In No-Till Corn, Grain Sorghum And Soybean Production, R.S. Moomaw, Alex Martin, R.N. Stougaard, Fred Roeth, G.A. Wicks, Robert N. Klein, Paul J. Jasa

University of Nebraska-Lincoln Extension: Historical Materials

Tips for successful no-till weed control, weed control principles for no-till row crop production, and no-till row crops planted into legume or small grain residues are covered here. Soil erosion by wind and water is a strong societal concern in our state and nation. Current estimates are that more than 100 million tons of topsoil are eroded annually in Nebraska, with 75 percent of that coming from row crop areas. Nebraska farmers have been implementing changes in their crop production practices to reduce soil erosion.

Ec89-119 Hail Damage Assessment And Replant Decisions, Charles A. Shapiro, Timothy A. Powell

University of Nebraska-Lincoln Extension: Historical Materials

Hail is one of the many hazards that can damage a growing crop. Early in the growing season a producer has the option to replant a field seriously damaged by hail. The question is, how do you decide if it is worthwhile to replant, and what information do you need to make an informed decision? Factors to consider when deciding to replant are the expected yield reduction due to hail, the cost of replanting, and the yield potential of the replanted crop. Other information needed to make a rational decision is included in this publication, and several examples are given.

G89-906 Barley Yellow Dwarf Disease Of Barley, Oats, And Wheat, John E. Watkins, Leslie C. Lane

University of Nebraska-Lincoln Extension: Historical Materials

The symptoms of barley yellow dwarf are covered here, as are disease occurrence and spread, and control.

Barley yellow dwarf (BYD) is distributed worldwide. It is the most economically important disease of barley and oats in North America. Barley yellow dwarf, wheat streak mosaic (WSM) and soil-borne wheat mosaic (SBWM), are three virus diseases that caused serious cereal grain yield losses in Nebraska during the last decade.

Since the mid-1980s barley yellow dwarf has become increasingly widespread in Nebraska, and now is a serious concern to oat and wheat producers. Outbreaks occasionally reach epidemic proportions as occurred in wheat in …

Estimates Of Genetic Variability In F2 Maize Populations, Geng-Chen Han, A. R. Hallauer

Journal of the Iowa Academy of Science: JIAS

Maize (Zea mays L.) breeders emphasize selection within F₂ populations derived from crosses of inbred lines: Studies of the inheritance of quantitative traits in maize have been conducted primarily for generically broad-based populations. Objectives of our study were to estimate the generic variability in F₂ populations developed from crosses of related and unrelated lines and to determine the effects of five generations of random intermating of plants within F₂ populations on the estimates of genetic variability. Estimates of additive genetic variability were greater in the unrelated line crosses, but the estimates were not significantly different before and …