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Characteristics Of Successful Competitors: An Evaluation Of Potential Growth Rate In Two Cold Desert Tussock Grasses, Eissenstat D. M., Caldwell M. M.

Aspen Bibliography

Within the first few weeks after seedling emergence, Agropyron desertorum, a more competitive tussock grass, had a much higher mean relative growth rate (RGR) than Agropyron spicatum, a very similar, but less competitive species. However, beyond the early seedling stage, the two grasses had a remarkably similar whole-plant RGR in hydroponic culture and aboveground RGR in glasshouse soil, if root temperatures were above approximately 12° C. At soil temperatures between 5 and 12° C, A. desertorum exhibited a 66% greater aboveground RGR than A. spicatum (P < 0.05). Both species responded similarly to warming soil temperatures. In the field, however, tiller growth rates were generally similar. Neither species showed marked tiller elongation until a couple of weeks after snowmelt, by which time soil temperatures, at least to a depth of 10 cm, were above 12° C for a significant portion of the day. Above-ground biomass accumulation over a three-year period indicated that both grasses had similar potential growth rates whereas Artemisia tridentata ssp. vaseyana, a common neighbor planted in the same plots, had a much greater potential growth rate. The greater competitive ability of adult A. desertorum, as compared to A. spicatum, cannot be attributed to appreciable differences in potential growth rates.

Comprehensive Review: Self-Study - Recommendations 1987, Southeast Research & Extension Center

Southeast Research and Extension Center: Reports and Administration

Foreword
    Introduction ....................................................... 1
    What Makes a Comprehensive Review Most Effective ................... 4
    Members of the Review Team ......................................... 5
    Review Schedule .................................................... 6

Southeast Nebraska Information ......................................... 10

Southeast Research and Extension Center
    History of the Organization ....................................... 11
    Organizational Structure of the University of Nebraska-Lincoln .... 12
    Organizational Structure of the Institute of Agriculture and Natural Resources .. 13
    Internal Relationships of the Institute of Agriculture and Natural Resources ..... 14
    Staff of Southeast Research and Extension Center and the Southeast
           Extension District ....... 15

Southeast Research and Extension Center Programs ....................... 17
    Cooperative Extension Service ..................................... 18 …

Biotechnology: Altering Agriculture And The Nature Of Food, Susan K. Harlander

Journal of the Minnesota Academy of Science

Fundamental discoveries in molecular biology within the past 30 years have initiated a biological revolution, which will have a profound effect on industry, government, and academic institutions. To date, the major industrial focus of this technology has been its use in the development of human healthcare-related products, such as human growth hormone, insulin, interferons, and interleukins, which can now be mass produced by genetically engineered microorganisms. However, the potential for genetically engineering plant, animal, and microbial cells with desirable structural, functional or chemical properties, offers an exciting new dimension for biotechnological input into the production and processing of foods. This …

Barley Agronomy., K. J. Young

Experimental Summaries - Plant Research

Trial 87E6, 87MT45, 87SG11, 87ES8

Locations: Esperance Downs Research Station, Mount Barker Research Station, Salmon Gums Research Station, Melijinup Field Station,

Barley variety x time of planting

To study phenological development and its effect on yield in a range of barley cultivars at four planting dates.

Trial 87E42

Aphicide toxicology x barley variety.

Location: EDRS

To measure the effect of disulfoton (Disyston *R) applied as granules at seeding on barley, to determine if there is any phytotoxicity.

Trial 87ES40, 87E32

Barley variety x cereal aphids.

Location: Malijinup Field Station, Esperance Downs Research Station

To study the development of cereal aphids …

Virus Disease Of Small Fruits, R. H. Converse

School of Biological Sciences: Faculty Publications

This illustrated handbook was compiled by international authorities on virus and viruslike diseases of small fruits. Crops covered are in the plant genera Fragaria (strawberry), Vaccinium (blueberry and cranberry), Ribes (currant and gooseberry), and Rubus (blackberry and raspberry). The history, geographic distribution, importance, symptoms, transmission, cause, detection, and control of virus and viruslike diseases attacking these crops are discussed.

The Edible Oil Scene Problem And Opportunity, Shymal Roy

IIMB Management Review

No abstract provided.

Louisiana Agriculture Magazine, Summer 1986, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Agricultural Research Division 100th Annual Report, July 1, 1985, To June 30, 1986

Agricultural Research Division: News and Annual Reports

This 100th Annual Report contains lists of current faculty, active projects, refereed journal publications, brief descriptions of research in selected areas, and the financial report for the period July 1, 1985, through June 30, 1986. Research programs in agriculture, home economics, and natural resources at the University of Nebraska have changed greatly since the U.S. Congress approved the establishment of an Agricultural Experiment Station in each state with the passage of the Hatch Act on March 2, 1887. Although Hatch funds account for a smaller proportion of the total research expenditures in the program today, this legislation continues to be …

Resistance Of Wild Rices, Oryza Spp., To The Brown Planthopper, Nilaparvata Lugensi (Homoptera: Delphacidae), Wu Jung-Tsung, E. A. Heinrichs, F. G. Medrano

Department of Entomology: Faculty Publications

Of 36 wild rices screened, 19 accessions were resistant or moderately resistant to three biotypes of the brown planthopper, Nilaparvata lugens (Stål), and 9 were resistant or moderately resistant to at least one biotype. Resistant accessions were nonpreferred and N. lugens caged on resistant accessions had low food ingestion rates, slow nymphal development, reduced longevity, low fecundity, and consequently low populations. Two wild rice species decreased the percent hatchability of N. lugens eggs. Some moderately resistant accessions have tolerance to N. lugens, as indicated by low plant damage ratings and plant loss and high percentage N. lugens survival and …

South Dakota Farm And Home Research, South Dakota State University

South Dakota Farm and Home Research: 1949 -1998

Director’s Comment: Thirteen citizen’s-your neighbors-will set our goals. Help them out [p] 2
Keep oats clean: No racehorse premium, dockage, even refusal at the elevator if oats carry live insects [p] 3
McCrory Gardens facelift: Added attractions coming to garden that has already attracted worldwide acclaim [p] 6
Shared goals: Seedsmen and SDSU are partners in research and education acreage east of Brookings [p] 10
New: a chloride test: SDSU is first land=grant lab to make the recs; chloride mat boost your wheat yields [p] 12
More sheep, more disease: Scientists have become sleuths, tracking down elusive ‘villain’ in sheep …

1986 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University

Little International "Little I" Agricultural Exposition Catalogs

No abstract provided.

G86-783 Complete Rations -- Should You Feed Them?, Foster G. Owen

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses the advantages and disadvantages of feeding complete rations to dairy herds.

Using the complete ration system for feeding dairy cows has become increasingly popular. Nutritionists generally consider it the ideal method of feeding dairy cattle. Milk production per cow can be maximized, and feed and labor costs minimized, with this system. However, the necessary equipment is expensive and may be excessive for loose-housed herds of less than 100 cows.

G86-797 Causes Of Vaccination-Immunization Failures In Livestock, Duane Rice, E. Denis Erickson, Dale Grotelueschen

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses reasons why vaccinations fail to provide immunity against disease, and how to prevent this from happening.

To comprehend the many reasons for vaccine failure, it is important to understand how animals and humans have the ability to resist infectious diseases. It is also important to know what a disease is and how it affects the animal.

According to Stedman's Dictionary, disease is an interruption, cessation or disorder of body functions, systems or organs. Diseases may be obvious even to the untrained eye, or detectable only by sophisticated testing procedures (subclinical disease). Serious irreversible damage may be …

Ec86-113 A Guide For Planning And Analyzing A Year-Round Forage Program, Steven S. Waller, Lowell E. Moser, Bruce Anderson

University of Nebraska-Lincoln Extension: Historical Materials

Efficient grazing management programs cannot succeed without proper stocing rates. However, proper stocking rate alone will not insure a successful grazing program. Successful grazing management only occurs when all factors affecting production are manipulated properly: season of use; kind, class, and/or combination of animals; grazing distribution; grazing program; fertilization; pest control; and water management as well as stocking rate. The following suggestions in this circular are a guide to initial planning of new pastures and the modification of existing grazing programs.

Mp51 Distillers Grains, Glen Aines, Terry Klopfenstein, Rick Stock

University of Nebraska-Lincoln Extension: Historical Materials

In the conventional production of alcohol from grain for fuel, byproducts are produced with excellent feeding value for ruminants. Appropriate use of these byproducts aids the efficient production of animals and enhances the economics of alcohol production. In the fermentation of corn to produce alcohol, the starch in the corn is converted to alcohol and carbon dioxide. The nutrients in the corn other than starch are concentrated about three times because corn is about two-thirds starch. Even though starch is high in energy, the one-third of the corn remaining in the byproduct after fermentation contains as much energy per pound …

G86-814 Using Ram Lambs For Breeding, Ted Doane

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide explains how ram lambs can be most efficiently used in a breeding program and provides management suggestions for a successful program.

Are you planning to use a ram lamb this breeding season? If so, you should consider the capabilities and limitations of ram lambs.

It may be true that some well-grown, aggressive, vigorous, highly fertile ram lambs can settle 50 ewes and maybe more. However, these rams are exceptions. A good rule to follow for practical ram management is 15 to 20 ewes for a ram lamb and 35 to 50 ewes for a mature ram.

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.

G86-821 Weaned Pig Management And Nutrition (Revised August 1992), Duane Reese, Mike Brumm

University of Nebraska-Lincoln Extension: Historical Materials

Temperature, space, health considerations, dietary nutrient allowances, feeding management and more are covered here. The weaning age of pigs farrowed in Nebraska is variable. While the average age at weaning is about four weeks, the range is from two to eight weeks. However, industry surveys indicate that more than 50 percent of the pigs in the United States are weaned at 28 days of age or earlier, with the majority weaned between three and four weeks of age. This trend towards earlier weaning is expected to continue with advances in management, housing, health and nutrition. Earlier weaning (under 28 days) …

G86-794 Enterotoxemia In Lambs, Dale M. Grotelueschen, Duane N. Rice

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses the causes, clinical signs, diagnosis, treatment, and prevention methods of this potentially fatal disease.

Enterotoxemia, which is also known as "overeating" or "pulpy kidney" disease, is a highly significant and costly disease problem for the sheep industry. Proper preventive practices are strongly recommended to sheep producers in order to avoid death loss from this disease.

The word "enterotoxemia" can be broken down into three parts that can be an aid in understanding the disease. The term "entero" refers to intestine; "tox" refers to toxin or poison; and "emia" refers to blood. Thus, from "intestinal toxin in the …

Illustrated Guide To Integrated Pest Management In Rice In Tropical Asia, W. H. Reissig, Elvis A. Heinrichs, J. A. Litsinger, K. Moody, L. Fieldler, T. W. Mew, A. T. Barrion

Entomology Papers from Other Sources

In the past, farmers in tropical Asia grew traditional rice cultivars and either relied primarily on cultural, mechanical, and physical methods of pest control or practiced no pest control. Pesticide application was limited because the yield potential of traditional varieties was too low to justify additional investments. Although pests destroyed part of each crop, severe outbreaks or epidemics were rare.

The widespread introduction of high-yielding rice cultivars in Asia in the last two decades and the associated changes in production practices have improved conditions for insects, diseases, weeds, and rodents. The higher yield potential of the new rices also made …

G86-819 At What Weight Should Holstein Heifers Freshen?, Jeffrey F. Keown

University of Nebraska-Lincoln Extension: Historical Materials

This guide offers research findings on the appro-priate weights for Holstein heifer freshening and sug-gests producers be aware of economic considerations involved in heifer freshening.

Most producers realize that the weight of a heifer at freshening affects the amount of milk produced during the first lactation. Heifers not fed balanced nutritional diets before freshening will not produce at an optimum level since they do not have the body reserves to maintain peak produc-tion. Likewise, a heifer that freshens very heavy will not pro-duce as much as she should because she is too heavy. There must be a break-even point at …

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.

Growth And Magnesium Uptake Of Tall Fescue Lines At High And Low Potassium Levels, J. H. Edwards, Jeffrey F. Pedersen

Department of Agronomy and Horticulture: Faculty Publications

Five tall fescue (Festuca arundinacea Schreb.) clonal lines with diverse root and xylem diameters were grown in nutrient solutions with magnesium (Mg) concentrations of 42, 125 and 250 µm and potassium K concentrations of 133 and 333 µm. Leaf Mg concentrations increased with increasing Mg rates at both low and high K concentrations. The tall fescue line with the largest root and xylem diameters had low leaf Mg concentrations, indicating a possible increased Mg tetany potential when consumed by cattle. The response of the K/(Mg+Ca) ratio in the plant, an indicator of tetany potential, to varying solution Mg at low …

Mathematical Programming Model Of Western Australian Dairy Farms, G R. Olney, D A. Falconer

Animal production and livestock research reports

A profit maximising mathematical programming dairy farm model has been developed which determines the most profitable management strategies for the full year. This model was initially an extension of the one used in the Western Australian Dairy Feed Management Service (DFMS) which determines the most profitable ration to feed for a specific period, the milk yield per cow and the number of cows to milk. The DFMS is useful for formulating a ration for a specific period, particularly during summer on non-irrigated farms in Western Australia when complete hand feeding is required, but it cannot be used to determine optimum …

South Dakota Farm And Home Research (Fall 1985), South Dakota State University

South Dakota Farm and Home Research: 1949 -1998

This issue contains the 98th South Dakota Agricultural Experiment Station Annual Report. This report covers July 1, 1984 - June 30, 1985.

Director’s comments: If you ran our Station budget, how would you spend the money? [p] 2
Spray spurge: Leafy spurge is no hit-and –run enemy; it digs in. Counterattack cannot be hit-and-run either [p] 3
The benefits of variety: For special meats, benefits are economic and nutritional. But you may have to lie a little [p] 5
Crossbreeding: the new look: Mixing genes isn’t all there is to it. You may have to adjust carrying capacity [p] 8 …

Effect Of Rations On Some Selected Blood Constituents Of Dairy Heifers, Kamil Akanbi

Masters Theses & Specialist Projects

The study was conducted using nine Holstein heifers with weights ranging from 700 to 990 pounds (lb). The design was a 3 X 3 Latin Square. The three rations consisted of 26.5 lb of corn silage supplemented with 3 ounces of sodium bicarbonate, 26.5 lb of corn silage, and 26.5 lb of soybean and milo haylage per head per day. The rations were offered on a rotational basis for three experimental periods consisting of three weeks each. Blood samples were taken at weekly intervals during each period; plasma concentrations of glucose, ammonia, beta-hydroxybutyrate and volatile fatty acids were determined.

There …

South Dakota Farm And Home Research, South Dakota State University

South Dakota Farm and Home Research: 1949 -1998

Director’s Comment: When you count up the organizations to which you belong, do you forget one? [p] 2
The mouse connection:Heredity, diet, habit are intertwined with obesity. Its secret is starting to unravel [p] 3
The ‘Norbeck experience: after 20 years Norbeck Station closes interseeded pastures still going strong [p] 6
‘South’ doesn’t apply: South Dakota is far north when it comes to large mouth stocking recs; we need our own [p] 9
Trees in trouble: First year of survey shows windbreaks in sad shape. We can’t afford to lose them [p] 11
The gee-whiz crop: Is it a wonder …

Louisiana Agriculture Magazine, Spring 1985, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Documentation Of Whole-Farm Model For The Eastern Wheatbelt Of Western Australia, Ross S. Kingwell, David J. Pannell, David. A. Morrison

Grain and other field crops published reports

The Eastern Wheatbelt Model (EwM) is a hypothetical farm model, intended to be representative of farms in the eastern wheatbelt region. It is a model of an 'average' farm in an 'average' season. Nevertheless it is possible to substitute the resource mix of a 'real' farm for the •average' and to substitute various types of season for the 'average'.

Assumptions of 'average' farm resources and •average' season are based on opinions by WADA researchers and advisers. For the EWM, researchers and advisers at Merredin prescribed average resources for an eastern wheatbelt farm receiving a 300 mm average rainfall including 210 …

G85-742 Dollar Spot Disease Of Turfgrass, John E. Watkins, Terrance P. Riordan

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide describes the symptoms and disease cycle of dollar spot, and provides recommendations for controlling this turfgrass disease.

Dollar spot of turfgrass is one of the most persistent diseases on golf courses in North America. All commonly grown turfgrasses in Nebraska may be attacked, but differences in susceptibility exist within cultivars of the various turf species. Presence of dollar spot in a well-managed lawn affects its aesthetic appearance and value, but usually does not threaten its survival. Lawns recover from dollar spot injury when conditions are favorable for vigorous, healthy growth.