Life Sciences Commons^™

Intensifying A Crop–Fallow System: Impacts On Soil Properties, Crop Yields, And Economics, S. J. Ruis, S. Stepanovic, Humberto Blanco-Canqui

Department of Agronomy and Horticulture: Faculty Publications

Intensifying crop–fallow systems could address increased weed control costs, increased land or rental costs, reduced crop diversity, and degraded soil properties in water-limited environments. One strategy to intensify such systems could be the insertion of a short-season crop during fallow. But, how this strategy affects soils, crop production, and farm economics needs further research. Thus, we studied the impacts of replacing fallow in a winter wheat (Triticum aestivum L)–corn (Zea mays L.)–fallow system with a short-season spring crop [field pea (Pisum sativum L.)] on crop yields and economics from 2015 to 2019 and 5-yr cumulative effects on …

Winter Wheat Grain Yield Response To Fungicide Application Is Influenced By Cultivar And Rainfall, Emmanuel Byamukama, Shaukat Ali, Jonathan Kleinjan, Dalitso N. Yabwalo, Christopher Graham, Melanie Caffe-Treml, Nathan D. Mueller, John Rickertsen, William A. Berzonsky

Department of Agronomy and Horticulture: Faculty Publications

Winter wheat is susceptible to several fungal pathogens throughout the growing season and foliar fungicide application is one of the strategies used in the management of fungal diseases in winter wheat. However, for fungicides to be profitable, weather conditions conducive to fungal disease development should be present. To determine if winter wheat yield response to fungicide application at the flowering growth stage (Feekes 10.5.1) was related to the growing season precipitation, grain yield from fungicide treated plots was compared to non-treated plots for 19 to 30 hard red winter wheat cultivars planted at 8 site years from 2011 through 2015. …

Long-Term Winter Wheat (Triticum Aestivum L.) Seasonal Irrigation Amount, Evapotranspiration, Yield, And Water Productivity Under Semiarid Climate, Koffi Djaman, Michael O'Neill, Curtis K. Owen, Daniel Smeal, Margaret West, Dallen Begay, Samuel Allen, Komlan Koudahe, Suat Irmak, Kevin Lombard

Department of Agronomy and Horticulture: Faculty Publications

A long-term field experiment was conducted from 2002 to 2014 for the evaluation of yield and water productivity of three winter wheat varieties—Kharkof, Scout 66, and TAM107—under sprinkler irrigation at New Mexico State University Agricultural Science Center at Farmington, NM. Winter wheat daily evapotranspiration was estimated following the United Nations Food and Agriculture Organization FAO crop coefficient approach (ETc = Kc ETo), and crop water use efficiency (CWUE), evapotranspiration water use efficiency (ETWUE), and irrigation water use efficiency (IWUE) were estimated for each growing season. There was inter-annual variation in seasonal precipitation and irrigation amounts. Seasonal irrigation amounts varied from …

Crop Residue Harvest Impacts Wind Erodibility And Simulated Soil Loss In The Central Great Plains, Yuxin He, Deann R. Presley, John Tatarko, Humberto Blanco-Canqui

Department of Agronomy and Horticulture: Faculty Publications

Crop residue removal can affect the susceptibility to soil wind erosion in climates such as those of the Central Great Plains, United States. Six on-farm trials were conducted in Kansas from 2011 to 2013 to determine the effects of winter wheat (Triticum aestivum L.), corn (Zea mays L.), and grain sorghum (Sorghum bicolor (L.) Moench), residue removal at 0, 25, 50, 75, and 100% of initial height on soil wind erosion parameters. Those parameters include soil surface random roughness (RR), and wind erodible fraction (EF; aggregates -¹ for three hours. Threshold wind velocity required to initiate …

Population Dynamics Of The Wheat Curl Mite (Acari: Eriophyidae) During The Heading Stages Of Winter Wheat, Anthony J. Mcmechan, Gary Hein

Department of Entomology: Faculty Publications

The wheat curl mite (Aceria tosichella Keifer) is the only known vector of three viruses in wheat—Wheat streak mosaic virus, Wheat mosaic virus, and Triticum mosaic virus. The economic impact of this disease complex is linked to the presence of suitable hosts prior to winter wheat maturing in early summer and the movement of wheat curl mite from wheat to oversummering hosts prior to wheat harvest. Previous research has documented the prevalence and density of mite populations on maturing wheat heads; however, these studies were limited to a few late stages of wheat. A study was conducted …

U.S. Drought Monitor, May 26, 2015, Brad Rippey

United States Agricultural Commodities in Drought Archive

Drought map of U.S. for May 26, 2015 (5/26/15) plus: U.S. crop areas experiencing drought (map), Approximate percentage of crop located in drought, by state (bar graph), Percent of crop area located in drought, past 52 weeks (line graph) for: Corn, Soybeans, Hay, Cattle, Winter wheat.

Planting Date And Variety Selection For Management Of Viruses Transmitted By The Wheat Curl Mite (Acari: Eriophyidae), Anthony J. Mcmechan, Gary Hein

Department of Entomology: Faculty Publications

Wheat is an important food grain worldwide, and it is the primary dryland crop in the western Great Plains. A complex of three viruses (Wheat streak mosaic, Wheat mosaic, and Triticum mosaic viruses) is a common cause of loss in winter wheat production in the Great Plains. All these viruses are transmitted by the wheat curl mite (Aceria tosichella Keifer). Once these viruses are established, there are no curative actions; therefore, prevention is the key to successful management. A study was designed to evaluate preventative management tactics (planting date, resistant varieties) for reducing the impact from this virus complex. …

Studies Of Drought Tolerance Of Hard Red Winter Wheat (Triticum Aestivum L.) Cultivars In Nebraska, Sumardi Bin Abdul Hamid

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

In Nebraska, about 75% of the wheat production is in the western half of the state, and about 92% of the winter wheat acreage is in dryland production, where productivity is limited by low and/or uncertain rainfall. We have investigated the effects of water stress on few established winter wheat (Triticum aestivumL.) cultivars, which are known for their superior adaptation to either rainfed or irrigated wheat production systems in western Nebraska. We also began a study to investigate the variation in the root system architecture to confer drought tolerance in winter wheat. The objectives of this study were …

Economic Returns From Fungicide Application To Control Foliar Fungal Diseases In Winter Wheat, Stephen N. Wegulo, Michael V. Zwingman, Julie A. Breathnach, P. Stephen Baenziger

Department of Plant Pathology: Faculty Publications

Fungicides are commonly applied to control foliar fungal diseases of winter wheat in the central Great Plains of the United States and often are routinely recommended. However, economic benefits from fungicide application in winter wheat have rarely been quantified in this region. A total of eight field experiments were conducted in 2006 and 2007 in Nebraska, USA to quantify yield increases from fungicide applications to control foliar fungal diseases in winter wheat. Experiments were conducted at the same four locations (Mead, Clay Center, North Platte and Sidney) in both years. The fungicides used were azoxystrobin + propiconazole, pyraclostrobin, propiconazole, azoxystrobin …

Ec07-103 2007 Fall Seed Guide, Lenis Alton Nelson, David D. Baltensperger, Robert N. Klein, Bruce Anderson, Jerry D. Volesky, P. Stephen Baenziger, James Krall

University of Nebraska-Lincoln Extension: Historical Materials

The 2006 wheat crop has faced more than the usual number of challenges. Western Nebraska was again faced with shortages of rainfall as well as wheat streak mosaic. Eastern Nebraska fared better, but some places had soil borne mosaic problems. Overall, the state yield was down but becasue of similar problems throughout the Great Plains, the price of wheat has remained strong. This circular is a progress report of variety trials conducted by personnel of the Agronomy Department, West Central and Panhandle Research and Extension Centers and their associated agricultural laboratories and the South Central Ag Lab. Conduct of experiments …

Ec06-103 Fall Seed Guide, 2007, Lenis Alton Nelson, Robert N. Klein, Bruce Anderson, P. Stephen Baenziger, Jerry Nachtman

University of Nebraska-Lincoln Extension: Historical Materials

This circular is a progress report of variety trials conducted by personnel of the Agronomy Department, West Central and Panhandle Research and Extension Centers and their associated agricultural laboratories and the South Central Ag Laboratory. Conduct of experiments and publications of results is a joint effort of the Agricultural Research Division and the Cooperative Extension Service.

Ec06-155 Nutrient Management For Agronomic Crops In Nebraska, Richard B. Ferguson

University of Nebraska-Lincoln Extension: Historical Materials

Nebraska is blessed with fertile soil and vast supplies of groundwater which combine to create an environment well-suited to the production of corn, wheat, grain sorghum, alfalfa, edible beans, and other agronomic crops used for human or animal consumption.

This manual is a guide to nutrient use from all sources for the production of Nebraska's major agronomic crops: corn, winter wheat, grain sorghum, oats, alfalfa, dry edible beans, soybean, sugar beets, popcorn, sunflower, millet, potatoes, and cool and warm season grasses for hay and pasture. Part I of the manual contains information focusing on basic principles of soil fertility for …

Ec05-185 Grazing Winter Wheat In Nebraska, Tom Holman, Drew J. Lyon, David D. Baltensperger, Ivan G. Rush, Ray Weed

University of Nebraska-Lincoln Extension: Historical Materials

Grazing cattle on winter wheat, often prior to grain harvest, is common throughout the southern Great Plains. Grazing generates about $50 million in income for Texas wheat producers and reduces the risk of growing wheat by providing a substantial income source other than grain. Benefits can be realized by grazing prior to the primary environmental risk period for drought, heat stress, and hail, all of which frequently reduce grain yield while having limited impact on forage production. Cattle also are grazed on winter wheat fields in western Nebraska and the surrounding region. Typically in Nebraska, fall forage would be used …

Effects Of Choline, Betaine, And Wheat Floral Extracts On Growth Of Fusarium Graminearum, Jessica S. Engle, Patrick E. Lipps, Terry L. Graham, Michael J. Boehm

Department of Plant Pathology: Faculty Publications

Fusarium head blight has been more severe when infection occurs during anthesis, indicating that floral organs may be important infection courts. Choline acetate and glycinebetaine have been extracted from wheat and reported to be growth stimulants of Fusarium graminearum. They are hypothesized to enhance infection and tissue colonization. Growth of F. graminearum was examined on media amended with extracts from floral parts of nine wheat genotypes with various Fusarium head blight resistance levels. Results indicated no significant effect of anther, palea, or lemma extracts on radial growth when compared with unamended controls. Effects on spore germination and hyphal growth …

Nf04-616 Managing Foliar Diseases Of Winter Wheat With Fungicides Treatment Criteria, Profitability And Products, John E. Watkins

University of Nebraska-Lincoln Extension: Historical Materials

The leaf rust, stripe rust, powdery mildew, tan spot, Septoria leaf blotch and occasionally stem rust comprise the primary foliar disease of wheat in the central Great Plains. In southeast and south central Nebraska, leaf and stripe rusts, powdery mildew and Septoria leaf blotch are the most common and important foliar diseases. Tan spot predominates in the dryland wheat-fallow-wheat or ecofallow cropping systems found in the west central, southwest and Panhandle areas of Nebraska.

This NebFact discusses the treatment criteria, profitability of treatment, and the treatment products and timing of managing foliar diseases of winter wheat with fungicides.

Ec04-103 Fall Seed Guide, 2004, Lenis Alton Nelson, David D. Baltensperger, Robert N. Klein, Roger Wesley Elmore, P. Stephen Baenziger, James Krall

University of Nebraska-Lincoln Extension: Historical Materials

This circular is a progress report of variety trials conducted by personnel of the Agronomy Department and the South Central, West Central and Panhandle Research and Extension Centers and their associated agricultural laboratories. Conduct of experiments and publications of results is a joint effort of the Agricultural Research Division and the Cooperative Extension Service.

Ec02-103 Nebraska Fall-Sown Small Grain Variety Tests, 2002, Lenis Alton Nelson, David P. Baltensperger, Robert N. Klein, Roger Wesley Elmore, P. Stephen Baenziger, Todd Campbell

University of Nebraska-Lincoln Extension: Historical Materials

This circular is a progress report of variety trials conducted by personnel of the Agronomy Department and the South Central, West Central and Panhandle Research and Extension Centers and their associated agricultural laboratories. Conduct of experiments and publication of results is a joint effort of the Agricultural Research Division and the Cooperative Extension Service. Tests were supported in part by fees paid by commercial seed companies and the Nebraska Wheat Board. The 2002 estimated winter wheat yield for Nebraska was a 32 bushels per acre from 1,450,000 harvested acres. The total production of winter wheat for the state was 46,400,000 …

Nf562 Wheat Disease Fact Sheet No. 4: Management Program For Soil-Borne Wheat Mosaic And Wheat Yellow Mosaic (Wheat Spindle Streak), John E. Watkins

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact addresses management programs for soil-borne wheat mosaic and wheat yellow mosaic.

Soil-borne wheat mosaic occurs from early April to mid-May. It is characterized by yellow to pale green mosaic mottling and streaking of leaves, stunted plants and irregular patches of yellow or pale green wheat. Wheat yellow mosaic occurs from mid-March to early May. Characteristics include distinct light green to yellow spindle-shaped dashes on leaves. Infected plants are yellow and stunted.

Management practices including growing resistent or tolerant varieties. Winter wheat should be planted at the recommended date for your geographical area.

G02-1451 Climate Change And Winter Wheat: What Can We Expect In The Future?, Albert Weiss, Cynthia J. Hays

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide will explain how climate changes at the end of this century will affect winter wheat production. Although it doesn't make daily headlines, global warming that results from climate changes will present challenges for current and future generations. While scientists may disagree about what causes current climate change, there is general agreement that a change is happening now and will continue for some time. As humans, it doesn't matter much whether the air temperature is 92 degrees or 97 degrees - either way we tend to be uncomfortable. However, a 5 degree temperature change can have dramatic implications for …

G02-1460 Fertilizing Winter Wheat I: Nitrogen, Potassium, And Micronutrients, Jurg M. Blumenthal, Donald H. Sander

University of Nebraska-Lincoln Extension: Historical Materials

Soil testing, recommended rates, and timing for fertilizing winter wheat with nitrogen, potassium, and micronutrients.

Management practices which provide an adequate, but not excessive, supply of plant nutrients are essential for top yields of high quality winter wheat in the High Plains.

A Field Test Of The Wind Erosion Prediction System, Simon Van Donk, Edward L. Skidmore

West Central Research and Extension Center, North Platte

Field data need to be collected to test wind erosion models under a broad range of climate, soil, and management conditions. The objective of this study was to test the USDA- ARS Wind Erosion Prediction System (WEPS) for a field with winter wheat plants in a modest amount of flat residue. A 600 m by 415 m field was selected near Burlington, CO, USA. Big Spring Number Eight (BSNE) samplers were used to measure wind blown sediment flux and automated devices (Sensits) for continuous detection of saltation. A weather station recorded relevant meteorological data. Detailed measurements of the field surface …

Ec01-103 Nebraska Fall-Sown Small Grain Variety Tests 2001, Lenis Alton Nelson, David D. Baltensperger, Robert N. Klein, Roger Wesley Elmore, Todd Campbell, James Krall

University of Nebraska-Lincoln Extension: Historical Materials

This circular is a progress report of variety trials conducted by personnel of the Agronomy Department and the South Central, West Central and Panhandle Research and Extension Centers and their associated agricultural laboratories. Conduct of experiments and publication of results is a joint effort of the Agricultural Research Division and the Cooperative Extension Sersvice.

Ec98-103 Nebraska Fall-Sown Small Grain Variety Tests, 1998, Lenis Alton Nelson, David D. Baltensperger, Roger Wesley Elmore, P. Stephen Baenziger, Robert N. Klein, Kyung-Moon Kim

University of Nebraska-Lincoln Extension: Historical Materials

This circular is a progress report of variety trials conducted by personnel of the Agronomy Department and the South Central, West Central and Panhandle Research and Extension Centers and their associated agricultural laboratories. Conduct of experiments and publication of results is a joint effort of the Agricultural Research Division and the Cooperative Extension Service.

Ec98-898 Wheat Basis Patterns From Selected Sites In Nebraska

University of Nebraska-Lincoln Extension: Historical Materials

The following publication contains wheat basis patterns for several towns in Nebraska. The basic price information was collected through surveys, newspaper, electronic media, etc. The listing includes towns that are representative of different geographic locations in Nebraska. The amount of data varies among locations. This publication will be updated each year by adding a year's data to each location which will allow the user to observe the changes in the basis patterns over time.

Nf97-328 A Guide To Grasshopper Control In Cropland (Revised May 2004), Gary L. Hein, John B. Campbell

University of Nebraska-Lincoln Extension: Historical Materials

Grasshoppers have been a major concern to farmers and ranchers since Nebraska was first settled. The potential for devastation, while still serious, is not as great as it was 100 years ago because many of the prime grasshopper breeding areas along the eastern slopes of the Rocky Mountains are now under tillage. Statewide, grasshopper populations fluctuate in cycles with large numbers occurring for two to four years, followed by moderate numbers for several years.

This NebFact discusses grasshopper damage to cropland, how to determine when control is required and methods of control.

Nf97-321 Converting Crp To Cropland In The Nebraska Panhandle, Drew J. Lyon, Tom Holman

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact discusses techniques for converting CRP ground to cropland, including minimum tillage and crop rotations.

Nf96-307 Managing The Russian Wheat Aphid With Resistant Wheat Varieties, John Thomas, Gary Hein, David D. Baltensperger, Lenis Alton Nelson, Scott Haley

University of Nebraska-Lincoln Extension: Historical Materials

This NebFact has information on using resistant wheat varieties to control Russian wheat aphids.

G95-1272 Blue Mustard Control, Gail A. Wicks, Drew J. Lyon, Robert N. Klein

University of Nebraska-Lincoln Extension: Historical Materials

Blue mustard is a serious weed in winter wheat and alfalfa in central and western Nebraska. This NebGuide discusses methods of control.

Blue mustard [Chorispora tenella (Pallas) D.C.] was introduced into the U.S. from Siberia in 1929 and was first reported in Lewiston, Idaho. It was identified in Keith County Nebraska in 1953.

G95-1241 Annual Broadleaf Weed Control In Winter Wheat (Revised January 1999), Gail` A. Wicks, Robert N. Klein, Alex Martin, Drew J. Lyon

University of Nebraska-Lincoln Extension: Historical Materials

This guide discusses preventive, cultural, and chemical weed control in winter wheat. The best weed control is obtained by using a combination of these methods. Winter and summer annual broadleaf weeds have an important economic impact on Nebraska winter wheat. They compete with winter wheat for water, light, space, and nutrients, reducing Nebraska winter wheat yields by an estimated 10 percent each year. The dollar loss, with wheat at $2.50 per bushel, is over $2.1 million per year. Weeds also slow harvest and increase combine repair costs. Producers may be docked at the elevator for excessive grain moisture and/or weed …

Rp94-217 No. 18 Use Of Crop Futures And Options By The Nontrader, George Flaskerud, Richard Shane

University of Nebraska-Lincoln Extension: Historical Materials

Crop producers make a number of decisions that are market related. They may be categorized as financial decisions, production decisions, or marketing decisions. All three decisions depend on what prices are likely to be at some specific time in the future.

The marketing decisions is complex. This research publication discusses the number of alternatives that are available even for the producer who does not directly buy or sell futures or options contracts.