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2002

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Federally Owned Rangelands: Are There New Grounds For Common Ground?, Mark Rey Jan 2002

Federally Owned Rangelands: Are There New Grounds For Common Ground?, Mark Rey

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Today, we have recreated the range wars, using less violent, twentyfirst century means, but involving equally passionate views and similarly implacable foes. While some advocates vigorously defend a historic land use, others argue with increasing vehemence for sharp reductions-or even a complete cessation-of such uses, dismissing an entire lifestyle as nihilistic. In the face of such apparently intractable antagonism, some have predicted, with unseemly enthusiasm, the eventual sunset of federal land grazing. Others have advanced the seemingly enlightened idea of buying federal grazing leases as a better approach to improving publicly-owned range habitats.

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Cypress Spurge, H. Faubert, R. A. Casagrande Jan 2002

Cypress Spurge, H. Faubert, R. A. Casagrande

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Cypress spurge (Euphorbia cyparissias L.) is a herbaceous European perennial introduced into North America as an ornamental plant in the 1860s (Croizat, 1945). It was widely planted in graveyards and often is called graveyard weed (Muenscher, 1936). The plant escaped cultivation and became established on open ground, particularly in pastures (Stuckey and Pearson, 1973).

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Leafy Spurge, R. M. Nowiersky, R. W. Pemberton Jan 2002

Leafy Spurge, R. M. Nowiersky, R. W. Pemberton

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

Leafy spurge, Euphorbia esula L., is an invasive, deep-rooted perennial herb that is native to Eurasia. The plant spreads through explosive seed release and vigorous lateral root growth, forming large, coalescing patches that can dominate rangeland, pastures, prairies and other non-crop areas in the Great Plains region of North America.

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Swallow-Worts, L. Tewksbury, R. Casagrande, A. Gassmann Jan 2002

Swallow-Worts, L. Tewksbury, R. Casagrande, A. Gassmann

United States Department of Agriculture, Forest Service / University of Nebraska-Lincoln: Faculty Publications

There are three European species of swallow-worts found in North America: Vincetoxicum nigrum (L.) Moench (black swallow-wort), Vincetoxicum rossicum (Kleo.) Barb. (pale swallow-wort or dog strangling-vine), and Vincetoxicum hirundinaria Medik. (white swallow-wort) (Sheeley and Raynal, 1996). Swallow-worts are in the family Asclepiadaceae. Vincetoxicum nigrum and V. rossicum now are naturalized in northeastern North America, and both are invasive in natural areas and abandoned pastures (Lawlor, 2000). Swallow-worts are found in gardens and fields, along fencerows, roadways, grassy slopes, wooded edges, and streambanks. Tangled masses of swallow-wort vines shade and suppress native plants (Sheeley and Raynal, 1996). In Rhode Island, heavy …

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Efficient Infection Of Nicotiana Benthamiana By Tomato Bushy Stunt Virus Is Facilitated By The Coat Protein And Maintained By P19 Through Suppression Of Gene Silencing, Feng Qu, Thomas Jack Morris Jan 2002

Efficient Infection Of Nicotiana Benthamiana By Tomato Bushy Stunt Virus Is Facilitated By The Coat Protein And Maintained By P19 Through Suppression Of Gene Silencing, Feng Qu, Thomas Jack Morris

Nebraska Center for Virology: Faculty Publications

Tomato bushy stunt virus (TBSV) is one of few RNA plant viruses capable of moving systemically in some hosts in the absence of coat protein (CP). TBSV also encodes another protein (p19) that is not required for systemic movement but functions as a symptom determinant in Nicotiana benthamiana. Here, the role of both CP and p19 in the systemic spread has been reevaluated by utilizing transgenic N. benthamiana plants expressing the movement protein (MP) of Red clover necrotic mosaic virus and chimeric TBSV mutants that express CP of Turnip crinkle virus. Through careful examination of the infection phenotype …

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Diet Of Shovelnose Sturgeon Downstream From Gavins Point Dam: Final Report, Charles R. Berry Jr. Jan 2002

Diet Of Shovelnose Sturgeon Downstream From Gavins Point Dam: Final Report, Charles R. Berry Jr.

United States Army Corps of Engineers, Omaha District

The diet of shovelnose sturgeon (Scaphirhynchus platorhynchus) in the Missouri River downstream from Gavins Point Dam was characterized in 1993 (N=100 fish) and 1994 (N=103 fish) for comparison with similar data collected in 1971-72 (N=130 fish) by Modde and Schmulbach (1977, hereafter Modde). The primary difference among years in the South Dakota studies was river discharge, which was low in 1993 (9-22 kcfs; kcfs=thousand cubic feet per second), moderate in 1994 (18-31 kcfs), and high in 1971-72 (26-49 kcfs). We compared sturgeon diet weight and the weight of benthic and drifting invertebrates among years, among monthly discharges in …

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Does Increasing Daylength Control Seasonal Changes In Clutch Sizes Of Northern Pintails (Ana Acuta)?, Gary Krapu, Glen Sergeant, Alison Perkins Jan 2002

Does Increasing Daylength Control Seasonal Changes In Clutch Sizes Of Northern Pintails (Ana Acuta)?, Gary Krapu, Glen Sergeant, Alison Perkins

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

We evaluated spatiotemporal variation in clutch sizes of Northern Pintails (pintails; Anas acuta) nesting in California (1985 to 1996), North Dakota (1982 to 1985), Saskatchewan (1982 to 1985) and Alaska (1991 to 1993) to determine whether seasonal declines in clutch size varied in ways that were consistent with a controlling influence of increasing day length. Pintails began nesting in mid-March in California, mid-April in North Dakota and Saskatchewan, and mid-May in Alaska. Observed durations of nesting were 70 ± 2.6 days (SE) in California, 60 ± 6.3 days in North Dakota, 66 ± 1.3 days in Saskatchewan, and 42 …

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Effects Of Management Practices On Grassland Birds: Dickcissel, Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Amy L. Zimmerman, Betty R. Euliss Jan 2002

Effects Of Management Practices On Grassland Birds: Dickcissel, Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Amy L. Zimmerman, Betty R. Euliss

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Dickcissel (Spiza americana):
Breeding range
Suitable habitat
Area requirements
Brown-headed Cowbird brood parasitism
Breeding-season phenology and site fidelity
Species’ response to management
Management Recommendations
Habitat Characteristics

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Effects Of Management Practices On Grassland Birds: Western Meadowlark, Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Amy L. Zimmerman, Betty R. Euliss Jan 2002

Effects Of Management Practices On Grassland Birds: Western Meadowlark, Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Amy L. Zimmerman, Betty R. Euliss

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Western Meadowlark (Sturnella neglecta):
Breeding range
Suitable habitat
Area requirements
Brown-headed Cowbird brood parasitism
Breeding-season phenology and site fidelity
Species’ response to management
Management Recommendations
Habitat Characteristics

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Effects Of Management Practices On Grassland Birds: Vesper Sparrow, Jill A. Dechant, Meghan F. Dinkins, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Betty R. Euliss Jan 2002

Effects Of Management Practices On Grassland Birds: Vesper Sparrow, Jill A. Dechant, Meghan F. Dinkins, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Betty R. Euliss

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Upland Sandpiper (Pooecetes gramineus):
Breeding range
Suitable habitat
Area requirements
Brown-headed Cowbird brood parasitism
Breeding-season phenology and site fidelity
Species’ response to management
Management Recommendations
Habitat Characteristics

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Effects Of Management Practices On Grassland Birds: Upland Sandpiper, Jill A. Dechant, Meghan F. Dinkins, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Barry D. Parkin, Betty R. Euliss Jan 2002

Effects Of Management Practices On Grassland Birds: Upland Sandpiper, Jill A. Dechant, Meghan F. Dinkins, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Barry D. Parkin, Betty R. Euliss

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Upland Sandpiper (Bartramia longicauda):
Breeding range
Suitable habitat
Area requirements
Brown-headed Cowbird brood parasitism
Breeding-season phenology and site fidelity
Species’ response to management
Management Recommendations
Habitat Characteristics

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A Procedural Evaluation Of An Analytic-Deliberative Process: The Columbia River Comprehensive Impact Assessment, Aimee Guglielmo Kinney, Thomas M. Leschine Jan 2002

A Procedural Evaluation Of An Analytic-Deliberative Process: The Columbia River Comprehensive Impact Assessment, Aimee Guglielmo Kinney, Thomas M. Leschine

United States Army Corps of Engineers, Omaha District

The U.S. Department of Energy's Columbia River Comprehensive Impact Assessment (CRCIA) was an ambitious attempt to direct its cleanup of the Hanford Nuclear Reservation toward the most significant risks to the Columbia River resulting from past plutonium production. DOE's approach was uncommonly open, including tribal, regulatory agency, and other Hanford interest group representatives on the board that was to develop the assessment approach. The CRCIA process had attributes of the ``analytic-deliberative'' process for risk assessment recommended by the National Research Council. Nevertheless, differences between the DOE and other participants over what was meant by the term ``comprehensive'' in the group's …

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Immobilization Of Swift Foxes With Ketamine Hydrochloride-Xylazine Hydrochloride, Rebecca L. Telesco, Marsha A. Sovada Jan 2002

Immobilization Of Swift Foxes With Ketamine Hydrochloride-Xylazine Hydrochloride, Rebecca L. Telesco, Marsha A. Sovada

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

There is an increasing need to develop field immobilization techniques that allow researchers to handle safely swift foxes (Vulpes velox) with minimal risk of stress or injury. We immobilized captive swift foxes to determine the safety and effectiveness of ketamine hydrochloride and xylazine hydrochloride at different dosages. We attempted to determine appropriate dosages to immobilize swift foxes for an adequate field-handling period based on three anesthesia intervals (induction period, immobilization period, and recovery period) and physiologic responses (rectal temperature, respiration rate, and heart rate). Between October 1998–July 1999, we conducted four trials, evaluating three different dosage ratios of …

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Effects Of Management Practices On Grassland Birds: Sedge Wren, Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Barry D. Parkin, Betty R. Euliss Jan 2002

Effects Of Management Practices On Grassland Birds: Sedge Wren, Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Barry D. Parkin, Betty R. Euliss

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Sedge Wren (Cistothorus platensis):
Breeding range
Suitable habitat
Area requirements
Brown-headed Cowbird brood parasitism
Breeding-season phenology and site fidelity
Species’ response to management
Management Recommendations
Habitat Characteristics

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Effects Of Management Practices On Grassland Birds: Mountain Plover, Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Melvin P. Nenneman, Betty R. Euliss Jan 2002

Effects Of Management Practices On Grassland Birds: Mountain Plover, Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Melvin P. Nenneman, Betty R. Euliss

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Mountain Plover (Charadrius montanus):
Breeding range
Suitable habitat
Area requirements
Brown-headed Cowbird brood parasitism
Breeding-season phenology and site fidelity
Species’ response to management
Management Recommendations
Habitat Characteristics

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Effects Of Management Practices On Grassland Birds: Long-Billed Curlew, Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Paul A. Rabie, Betty R. Euliss Jan 2002

Effects Of Management Practices On Grassland Birds: Long-Billed Curlew, Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Paul A. Rabie, Betty R. Euliss

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Long-Billed Curlew (Numenius americanus):
Breeding range
Suitable habitat
Area requirements
Brown-headed Cowbird brood parasitism
Breeding-season phenology and site fidelity
Species’ response to management
Management Recommendations
Habitat Characteristics

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Effects Of Management Practices On Grassland Birds: Grasshopper Sparrow, Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Melvin P. Nenneman, Betty R. Euliss Jan 2002

Effects Of Management Practices On Grassland Birds: Grasshopper Sparrow, Jill A. Dechant, Marriah L. Sondreal, Douglas H. Johnson, Lawrence D. Igl, Christopher M. Goldade, Melvin P. Nenneman, Betty R. Euliss

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Grasshopper Sparrow (Ammodramus savannarum):
Breeding range
Suitable habitat
Area requirements
Brown-headed Cowbird brood parasitism
Breeding-season phenology and site fidelity
Species’ response to management
Management Recommendations
Habitat Characteristics

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"Introduction" To The Shape Of Change: Essays In Early Modern Literature And La Fontaine In Honor Of David Lee Rubin, Anne L. Birberick, Russell J. Ganim Jan 2002

"Introduction" To The Shape Of Change: Essays In Early Modern Literature And La Fontaine In Honor Of David Lee Rubin, Anne L. Birberick, Russell J. Ganim

Department of Modern Languages and Literatures: Faculty Publications

Since Michel Foucault’s The Archeology of Knowledge gained widespread critical recognition in the late 1960s, the concept of change has held a privileged position in the discourse of literary and cultural studies. Concerned with disruptions, transformations, and upheavals, scholars have focused on those moments of rupture when the present breaks with the past, when originality displaces convention, when inventio repudiates imitatio. This emphasis on aesthetic and epistemic shifts has all too often resulted in the neglect of more traditional issues having to do with problems of cultural development, evolution, and influence. It has also overlooked the idea of reading and …

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Genomewide Identification Of Proteins Secreted By The Hrp Type Iii Protein Secretion System Of Pseudomonas Syringae Pv. Tomato Dc3000, Tanja Petnicki-Ocwieja, David J. Schneider, Vincent C. Tam, Scott T. Chancey, Libo Shan, Yashitola Jamir, Lisa M. Schechter, Misty Janes, C. Robin Buell, Xiaoyan Tang, Alan Collmer, James R. Alfano Jan 2002

Genomewide Identification Of Proteins Secreted By The Hrp Type Iii Protein Secretion System Of Pseudomonas Syringae Pv. Tomato Dc3000, Tanja Petnicki-Ocwieja, David J. Schneider, Vincent C. Tam, Scott T. Chancey, Libo Shan, Yashitola Jamir, Lisa M. Schechter, Misty Janes, C. Robin Buell, Xiaoyan Tang, Alan Collmer, James R. Alfano

Department of Plant Pathology: Faculty Publications

The ability of Pseudomonas syringae pv. tomato DC3000 to be pathogenic on plants depends on the Hrp (hypersensitive response and pathogenicity) type III protein secretion system and the effector proteins it translocates into plant cells. Through iterative application of experimental and computational techniques, the DC3000 effector inventory has been substantially enlarged. Five homologs of known avirulence (Avr) proteins and five effector candidates, encoded by genes with putative Hrp promoters and signatures of horizontal acquisition, were demonstrated to be secreted in culture and/or translocated into Arabidopsis in a Hrp-dependent manner. These 10 Hrp-dependent outer proteins (Hops) were designated HopPtoC (Avr- PpiC2 …

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The P23 Protein Of Citrus Tristeza Virus Controls Asymmetrical Rna Accumulation, Satyanarayana Tatineni, Siddarame Gowda, Maria A. Ayllon, Maria R. Albiach-Marti, Shailaja Rabindran, William O. Dawson Jan 2002

The P23 Protein Of Citrus Tristeza Virus Controls Asymmetrical Rna Accumulation, Satyanarayana Tatineni, Siddarame Gowda, Maria A. Ayllon, Maria R. Albiach-Marti, Shailaja Rabindran, William O. Dawson

Department of Plant Pathology: Faculty Publications

Citrus tristeza virus (CTV), a member of the Closteroviridae, has a 19.3-kb positive-stranded RNA genome that is organized into 12 open reading frames (ORFs) with the 10 3' genes expressed via a nested set of nine or ten 3'-coterminal subgenomic mRNAs (sgRNAs). Relatively large amounts of negative-stranded RNAs complementary to both genomic and sgRNAs accumulate in infected cells. As is characteristic of RNA viruses, wild-type CTV produced more positive than negative strands, with the plus-to-minus ratios of genomic and sgRNAs estimated at 10 to 20:1 and 40 to 50:1, respectively. However, a mutant with all of the 3' genes …

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Discounting And Reciprocity In An Iterated Prisoner’S Dilemma, David W. Stephens, Colleen M. Mclinn, Jeffrey R. Stevens Jan 2002

Discounting And Reciprocity In An Iterated Prisoner’S Dilemma, David W. Stephens, Colleen M. Mclinn, Jeffrey R. Stevens

Jeffrey Stevens Publications

The Iterated Prisoner’s Dilemma (IPD) is a central paradigm in the study of animal cooperation. According to the IPD framework, repeated play (repetition) and reciprocity combine to maintain a cooperative equilibrium. However, experimental studies with animals suggest that cooperative behavior in IPDs is unstable, and some have suggested that strong preferences for immediate benefits (that is, temporal discounting) might explain the fragility of cooperative equilibria. We studied the effects of discounting and strategic reciprocity on cooperation in captive blue jays. Our results demonstrate an interaction between discounting and reciprocity. Blue jays show high stable levels of cooperation in treatments with …

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Methods And Compositions For Protection Against Bovine Viral Diseases, Subramaniam Srikumaran Jan 2002

Methods And Compositions For Protection Against Bovine Viral Diseases, Subramaniam Srikumaran

School of Veterinary and Biomedical Sciences: Faculty Publications

The present invention relates to methods and compositions for eliciting an immune response against bovine viral epitopes. The methods comprise combining at least one heat shock protein with at least one bovine viral epitope to form a purified epitope/heat shock protein complex and administration of an immune system stimulating amount of the purified epitope/heat shock protein complex. The compositions comprise, a purified epitope/heat shock protein complex comprising at least one bovine viral epitope complexed with at least one heat shock protein, and a pharmaceutically acceptable carrier, diluent or excipient.

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Parelaphostrongylus Tenuis In Captive Pronghorn Antelope (Antilocapra Americana) In Nebraska, Heather A. Simmons, David J. Steffen, Douglas L. Armstrong, Douglas G. Rogers Jan 2002

Parelaphostrongylus Tenuis In Captive Pronghorn Antelope (Antilocapra Americana) In Nebraska, Heather A. Simmons, David J. Steffen, Douglas L. Armstrong, Douglas G. Rogers

School of Veterinary and Biomedical Sciences: Faculty Publications

Lesions in four captive pronghorn antelope (Antilocapra americana) naturally infected with Parelaphostrongylus tenuis in eastern Nebraska (USA) are described in this report. Animals were bright and alert with hind limb ataxia that progressed to sternal or lateral recumbency between July 28 and October 17, 1998. Animals were euthanized due to disease progression despite therapy. Multifocal decubital ulcers over bony prominences occurred in two animals and chronic unilateral otitis media was present in one animal. Histopathologic examination revealed severe Wallerian degeneration randomly scattered throughout the spinal cords of all four animals. Spinal cord sections from two animals contained adult …

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Segregation Of Spermatozoa Within Sperm Storage Tubules Of Fowl And Turkey Hens, L. M. King, J. P. Brillard, M. R. Bakst, A. M. Donoghue Jan 2002

Segregation Of Spermatozoa Within Sperm Storage Tubules Of Fowl And Turkey Hens, L. M. King, J. P. Brillard, M. R. Bakst, A. M. Donoghue

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

In avian species, spermatozoa reside in the oviduct for prolonged periods in specialized structures known as sperm storage tubules, but little is known about the relative distribution of spermatozoa in these tubules after successive inseminations by different males. The staining efficacies of various fluorescent dyes for fowl and turkey spermatozoa were evaluated to investigate one proposed mechanism of sperm competition. Hens were then inseminated at different intervals with stained and unstained spermatozoa to observe the spatial distribution of spermatozoa within the storage tubules. Several novel fluorescent lipophilic tracers that successfully stain mammalian spermatozoa either did not stain fowl or turkey …

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Probability Of Nitrate Contamination Of Recently Recharged Groundwaters In The Conterminous United States, Bernard Nolan, Kerie Hitt, Barbara Ruddy Jan 2002

Probability Of Nitrate Contamination Of Recently Recharged Groundwaters In The Conterminous United States, Bernard Nolan, Kerie Hitt, Barbara Ruddy

United States Geological Survey: Staff Publications

A new logistic regression (LR) model was used to predict the probability of nitrate contamination exceeding 4 mg/L in predominantly shallow, recently recharged groundwaters of the United States. The new model contains variables representing (1) N fertilizer loading (p < 0.001), (2) percent cropland-pasture (p < 0.001), (3) natural log of human population density (p < 0.001), (4) percent well-drained soils (p < 0.001), (5) depth to the seasonally high water table (p < 0.001), and (6) presence or absence of unconsolidated sand and gravel aquifers (p =0.002). Observed and average predicted probabilities associated with deciles of risk are well correlated (r2 = 0.875), indicating that the LR model fits the data well. The likelihood of nitrate contamination is greater in areas with high N loading and well-drained surficial soils over unconsolidated sand and gravels. The LR model correctly predicted the status of nitrate contamination in 75% of wells in a validation data set. Considering all wells used in both calibration and …

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Safety Of Brucella Abortus Strain Rb51 Vaccine In Non-Target Ungulates And Coyotes, Terry J. Kreeger, Thomas J. Deliberto, Steven C. Olsen, William H. Edwards, Walter E. Cook Jan 2002

Safety Of Brucella Abortus Strain Rb51 Vaccine In Non-Target Ungulates And Coyotes, Terry J. Kreeger, Thomas J. Deliberto, Steven C. Olsen, William H. Edwards, Walter E. Cook

United States Department of Agriculture Wildlife Services: Staff Publications

Brucellosis is endemic in free-ranging elk (Cervus elaphus) and bison (Bison bison) in the Greater Yellowstone Area (GYA; USA). It is possible that an oral brucellosis vaccine could be developed and disseminated in the GYA to reduce disease transmission. Should this occur, non-target species other than elk and bison may come in contact with the vaccine resulting in morbidity or mortality. To assess biosafety, bighorn sheep (Ovis canadensis; n=10), pronghorn (Antilocapra americana; n=9), mule deer (Odocoileus hemionus; n=11), moose (Alces alces shirasi; n=10), and …

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Wildlife Diseases: Crying Wolf Or Crying Shame?, Robert G. Mclean Jan 2002

Wildlife Diseases: Crying Wolf Or Crying Shame?, Robert G. Mclean

United States Geological Survey: Staff Publications

Diseases of North American wildlife are causing serious problems for wildlife, and some wildlife diseases pose health threats to humans and domestic animals. Information will be presented at this wildlife disease session to alert resource managers enough to consider disease as an important issue when managing wildlife populations. It will be a crying shame if appropriate actions are not taken to monitor diseases adequately and to prevent or control them to protect our wildlife resources.

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Corn Yield Potential And Optimal Soil Productivity In Irrigated Corn/Soybean Systems, Achim R. Dobermann, Timothy J. Arkebauer, Kenneth G. Cassman, Rhae A. Drijber, J. Lindquist, S. Madhaven, John P. Markwell, Lenis Alton Nelson, James E. Specht, Daniel T. Walters, Haishun Yang, Brigid Amos, Darren L. Binder, C. Murphy, Gregory J. Teichmeier Jan 2002

Corn Yield Potential And Optimal Soil Productivity In Irrigated Corn/Soybean Systems, Achim R. Dobermann, Timothy J. Arkebauer, Kenneth G. Cassman, Rhae A. Drijber, J. Lindquist, S. Madhaven, John P. Markwell, Lenis Alton Nelson, James E. Specht, Daniel T. Walters, Haishun Yang, Brigid Amos, Darren L. Binder, C. Murphy, Gregory J. Teichmeier

Department of Agronomy and Horticulture: Faculty Publications

In 1999, an interdisciplinary research team at the University of Nebraska established a field experiment to (1) quantify and understand the yield potential of corn and soybean under irrigated conditions, (2) identify efficient crop management practices to achieve yields that approach potential levels, and (3) determine the energy use efficiency, global warming and soil C-sequestration potential of intensively managed corn systems. The experiment compares systems that represent different levels of management intensity expressed as combinations of crop rotation (continuous corn, corn-soybean), plant density (low, medium, high) and nutrient management (recommended best management vs. intensive management). Detailed measurements include soil nutrient …

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Genetic Analysis Of Feed Quality And Seed Weight Of Sorghum Inbred Lines And Hybrids Using Analytical Methods And Nirs, C. Hicks, M. R. Tuinstra, Jeffrey F. Pedersen, F. E. Dowell, K. D. Kofoid Jan 2002

Genetic Analysis Of Feed Quality And Seed Weight Of Sorghum Inbred Lines And Hybrids Using Analytical Methods And Nirs, C. Hicks, M. R. Tuinstra, Jeffrey F. Pedersen, F. E. Dowell, K. D. Kofoid

Department of Agronomy and Horticulture: Faculty Publications

Eight lines of grain sorghum and their F1 hybrids were evaluated for contents of crude protein (CP), fat (FAT), and starch (STA); protein digestibility (PD); and in vitro dry matter disappearance (IVDMD). The effect of seed weight (SW) on these traits and the potential use of near infrared reflectance spectroscopy (NIRS) to predict them also were investigated. The male lines included three normal-seeded lines (TX2737, TX435, and P954063) and two largeseeded lines (PL-1 and Eastin1). The female lines included commonU.S. seed parent lines (Wheatland, Redlan, and SA3042). The lines and their hybrids were grown under dryland conditions at Kansas State …

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Impact Of Manure Application On Phosphorus Runoff And Soil Erosion, Daniel T. Walters, C. Gossin, Gregory J. Teichmeier, Galen E. Erickson Jan 2002

Impact Of Manure Application On Phosphorus Runoff And Soil Erosion, Daniel T. Walters, C. Gossin, Gregory J. Teichmeier, Galen E. Erickson

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Phosphorus (P) losses from agricultural land is a serious environmental issue because of the impact of P on freshwater eutrophication (McDowell, et al., 2001). The movement of P from soil to surface water is impacted by P input to soil and manure management practices that impact P transport processes. Twenty-one natural runoff plots were established to monitor the effect of time and method of composted beef feedlot manure application and feed P input on net losses of bio-available P and sediment in surface runoff. Reducing feed P inputs resulted in a 33% reduction in manure P content. Runoff losses of …

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