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Tillage And Fertilizer Influences On Corn And Legume Cover, J. E. Gilley, J. F. Power, P. J. Reznicek, S. C. Finkner

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

The use of legumes in a cropping system may provide a variety of benefits. In this study, the effectiveness of selected legume species in providing surface cover was examined. The legumes were interseeded into either conventional or no-till corn, with or without N fertilizer. Both maximum legume cover and maximum cover furnished by corn plus legumes were examined. Mean cover provided during the study period by both the cover crop, and corn plus cover crop was also determined.

The Prairie Naturalist Volume 21, No.4 December 1989

The Prairie Naturalist

SMALL MAMMALS IN TALL-GRASS PRAIRIE: PATTERNS ASSOCIATED WITH GRAZING AND BURNING ▪ E. K. Clark, D. W. Kaufman, E. J. Finck, and G. A. Kaufman

BURROW DISTRIBUTION OF THIRTEEN-LINED GROUND SQUIRRELS IN RELATION TO TREE CANOPIES ▪ J. L. Koprowski 185

SPRING AND SUMMER PREY REMAINS COLLECTED FROM MALE MINK DENS IN SOUTHWESTERN MANITOBA ▪ . T. W. Arnold and E. K. Fritzell

BREEDING CANVASBACKS: A TEST OF A HABITAT MODEL ▪ D. H. Johnson, M. C. Hammond, T. L. McDonald, C. L. Nustad, and M. D. Schwartz

A CHECKLIST OF THE ANTS OF OKLAHOMA ▪ G. C. Wheeler and …

Can Genetically Engineered Crops Become Weeds?, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

There are significant differences if the distribution of weedy characteristics among weeds, normal plants, and crops. The world’s most serious weeds possess on the average 10 or 11 of these characters, a random collection of British plants have an average seven of the traits, and crop plants only five. For the average crop to become as “weedy” as the average weed, it would need to acquire five weedy traits. Even using the unlikely assumption that those traits are single loci in which a dominant mutation would provide the weedy character, this would require the simultaneous acquisition of five gene substitutions. …

Soil Disturbance-Residue Management Effect On Winter Wheat Growth And Yield, Wallace Wilhelm, H. Bouzerzour, J. F. Power

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

The need to reduce soil erosion, maximize soil water conservation, and optimize grain production in dryland cropping systems in the Central Great Plains has culminated in development of nontilled fallow systems. These systems have greatly reduced the degree of soil disturbance, and the amount and degree of residue incorporation. The objectives of this study were to evaluate the influence of soil disturbance and residue management on soil temperature, soil water, and winter wheat (Triticum aestivum L.) growth. Two field studies were established in 1981 and 1982 on an Alliance silt loam (Fine-silty, mixed, mesic Aridic Argiustoll) with treatments consisting …

The Prairie Naturalist Volume 21, No.3 September 1989

The Prairie Naturalist

SEED DISPERSAL CHARACTERISTICS OF PLAINS SILVER SAGEBRUSH ▪ C. L. Wambolt, T. Walton, and R. S. White

ON THE TRAIL OF THE ANT, VEROMESSOR LOBOGNATHUS . ▪ G. C. Wheeler and J. Wheeler

LAND USE RELATIONSHIPS TO AVIAN CHOLERA OUTBREAKS IN THE NEBRASKA RAINWATER BASIN AREA ▪ B. J. Smith, K. F. Higgins, and C. F. Gritzner

INCIDENCE OF LEAD SHOT IN THE RAINWATER BASINS OF SOUTH CENTRAL NEBRASKA ▪ . D. W. Oates

REPRODUCTION, RECRUITMENT, AND SURVIVAL OF BROWN AND RAINBOW TROUT IN A PRAIRIE COTEAU STREAM ▪ C. L. Milewski and D. W. Willis

SIZE STRUCTURE AND CATCH …

Seedbed Effects On Grass Establishment On Abandoned Nebraska Sandhills Cropland, Milton King, Steven S. Waller, Lowell E. Moser, James L. Stubbendieck

Department of Agronomy and Horticulture: Faculty Publications

Perennial grass establishment on abandoned cropland in the Nebraska Sandhills difficult due to low soil fertility, organic matter, and water holding capacity and high potential erodibility. Establishment is further complicated by unpredictable precipitation and weed competition. Two warm-season grasses: sand bluestem [Andropogon gerardii var. paucipilus (Nash) Fern.] and switchgrass (Panicam virgatum L.); and 2 cool-season grasses: smooth brome (Bromus inermis Leyss.) and intermediate wheat-grass [Thinopyrum intermedium (Host) Barkw. & D.R. Dewey subsp. were evaluated with spring-seeded field trials. Seedbed preparation [untilled, disced, and dead oat (Avena sativa L.) cover (DOC)] effect on seeded grass and …

The Prairie Naturalist Volume 21, No.2 June 1989

The Prairie Naturalist

THE MISSISSIPPI KITE IN THE ENVIRONMENTAL HISTORY OF THE SOUTHERN GREAT PLAINS ▪ E. G. Bolen and D. L. Flores

TAPE-RECORDED CHICK CALLS TO LOCATE GRAY PARTRIDGE NESTS ▪ J. P. Carroll

BORROW DISTRIBUTION OF THE THIRTEEN-LINED GROUND SQUIRREL IN GRAZED MIXED-GRASS PRAIRIE: EFFECT OF ARTIFICIAL HABITAT STRUCTURE ▪ D. W. Kaufman and G. A. Kaufman

PIPING PLOVERS NESTING AT NELSON RESERVOIR, MONTANA ▪ D. W. Prellwitz, T. A. Prellwitz, K. L. Stutzman, and J. W. Stutzman

CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA - 1988 ▪ R. N. Randall

CHANGING HABITATS IN THE PLATTE RIVER VALLEY OF NEBRASKA ▪ J. …

Atrazine And Fertilizer Effects On Sandhills Sub- Irrigated Meadow, John J. Brejda, Lowell E. Moser, Steven S. Waller, Stephen R. Lowry, Patrick E. Reece, James T. Nichols

Department of Agronomy and Horticulture: Faculty Publications

Many Nebraska Sandhills sub irrigated meadows have shifted to predominantly cool-season grasses. Meadows are often cut in July when forage quality of cool-season is lower than that of warm season species. The objective of this research was to evaluate a one-time application of atrazine [6-chloro-N-ethyl-N’-(l-methylethyl)- 1,3,5-triazine-2,4-diamine] in restoring dominance of warm-season grasses and to determine lf nitrogen (N) with and without phosphorus (P) would enhance or prolong the atrazine effect on specks composition, yield, crude protein, and in vitro dry matter digestibility (IVDMD). Atrazine WM applied once at 0,2.2, and 3.3 kg/ha In spring or fall 1983 and 1984 to …

Bradyrhizobium Japonicum Survival In And Soybean Inoculation With Fluid Gels, Michael D. Jawson, Alan J. Franzluebbers, Robert K. Berg

Department of Agronomy and Horticulture: Faculty Publications

The utilization of gels, which are used for fluid drilling of seeds, as carriers of Bradyrhizobium japonicum for soybean (Glycine max (L.) Merr.) inoculation was studied. Gels of various chemical composition (magnesium silicate, potassium acrylate-acrylamide, grafted starch, and hydroxyethyl cellulose) were used, although the hydroxyethyl cellulose gels were more extensively investigated. Gel inocula were prepared by mixing gel powder with liquid cultures of B. japonicum (2% [wt/vol]). The population of B. japonicum USDA 110 did not change in each gel type during 8 days of incubation at 28°C. These fluid gels were prepared with late-exponential-growth-phase cells that were washed …

The Prairie Naturalist Volume 21, No.1 March 1989

The Prairie Naturalist

WINTER RAPTOR USE OF THE PLATTE AND NORTH PLATTE RIVER VALLEYS IN SOUTH CENTRAL NEBRASKA ▪ G. R. Lingle

CHARACTERISTICS OF RUFFED GROUSE DRUMMING SITES IN THE TURTLE MOUNTAINS, NORTH DAKOTA ▪ J. W. Schulz, E. L. Bakke, and J. F. Gulke

USE OF A TRIBUTARY BY FISHES IN A GREAT PLAINS RIVER SYSTEM ▪ J. B. Smith and W. A. Hubert

PLANT AND ANIMAL COMMUNITY RESPONSES TO RESTORED IOW A WETLANDS ▪ T. G. LaGrange and J. J. Dinsmore

COLEOPTERA SPECIES INHABITING PRAIRIE WETLANDS OF THE COTTONWOOD LAKE AREA, STUTSMAN COUNTY, NORTH DAKOTA ▪ B. A. Hanson and G. …

Genetic Variability For Seedling Atrazine Tolerance In Indiangrass, J. G. Kube, Kenneth P. Vogel, Lowell E. Moser

Department of Agronomy and Horticulture: Faculty Publications

Indiangrass [Sorghustrum nutans (L.) Nash] lacks sufficient seedling atrazine [6-chloro-N-ethyl-N’-(l-methylethyl)-1,3,5-triazine-2,4-diamine] tolerance to permit the use of atrazine as a pre-emergence herbicide. The principle objective of this study was to estimate the genetic variability for seedling atrazine tolerance in two indiangrass populations, 'Nebraska 54' and 'Holt', using seed harvested from replicated clones. Seedling survival in soil containing 3 mg kg^-1 atrazine was determined in the greenhouse. There was significant genetic variability among half-sib families of both populations for seedling atrazine tolerance. Heritability estimates were greater than 0.50. There was also significant genetic variability among the …

Soil Science Research Report - 1989

Soil Science Research Reports

Tillage Experiments

Increasing Nitrogen Use Efficiency by Dryland Sorghum Under Conventional and No-tillage Systems ............ 1

The Effect of Phosphorus Rate, Method of Application, and Tillage on Soybean Yield in Nebraska ............ 6

Tillage, Rotation and N Rate Effects on Dryland Com Production and Nitrogen Uptake in Northeastern Nebraska ............ 15

Fertilizer

Effect of Lime Application on Soil pH and Com Yield in Holt County ............ 22

Evaluation of the Influence of Starter Fertilizer on Com and Grain Sorghum, 1989 ............ 24

Fertilizer P Distribution and Wheat Yield ............ 26

Field Evaluation to Determine Best Fluid Starter Fertilizer for Com …

Distribution Of Soybean Cyst Nematode In Nebraska, Thomas O. Powers, L. J. Sandall, D. S Wysong

Department of Plant Pathology: Faculty Publications

A survey of 552 soybean fields in 20 counties in Nebraska in 1986-88 revealed 35 fields infested with the soybean cyst nematode (SCN), Heterodera glycines. Identification was confirmed with a greenhouse bioassay, using 'Lee 74' soybean, and by the application of a DNA hybridization probe derived from SCN mitochondrial DNA. Most of the SCN-infested fields were located on the Missouri River floodplain and in the southeastern corner of the state.

Immune, Growth And Carcass Responses Of Ram Lambs To Active Immunization Against Desulfated Cholecystokinin (Cck-8), W. E. Trout, J. C. Pekas, B. D. Schanbacher

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

This study explored feed intake and carcass responses to active immunization against desulfated cholecystokinin-octapeptide (CCK-8) in ram lambs. Antibody titers 8 wk following primary immunization and booster immunizations given at 4 and 6 wk averaged greater than 1:1,000. Titers increased to greater than 1:10,000 by 16 wk following a final booster immunization at 11 wk. The antibodies developed against desulfated CCK-8 exhibited 29% and 13% cross-reactivities for sulfated CCK-8 and gastrin-17, respectively. Immunization against desulfated CCK-8 had no effect on feed intake, ADG, carcass weight or carcass quality grade. Backfat thickness and carcass yield grade were reduced (P < .05) by immunization. Organ weights at slaughter, including those of the pancreas and small intestines, were not affected by CCK-8 immunization, with the exception of the lungs, which were 16% lighter (P < .01) in immunized lambs. In conclusion, active immunization against desulfated CCK-8 resulted in development of high antibody titers against desulfated and sulfated CCK-8. Immunization against CCK-8 decreased fat content of the carcass but failed to affect feed intake, carcass weight or ADG.

Farming Systems Research/Extension And The Concepts Of Sustainability, Charles A. Francis, Peter E. Hildebrand

Department of Agronomy and Horticulture: Faculty Publications

Farming Systems Research and Extension (FSR/E) has strongly influenced the direction of agricultural development over the past two decades. Involving farmers, change agents and researchers, this participatory approach to technological improvement has evolved as an efficient means to develop individual components and more integrated systems that are uniquely suited to specific biophysical and socioeconomic conditions. Farmers with similar conditions and for whom specific recommendations are appropriate are grouped, in FSR/E, into identifiable Recommendation Domains. The technologies recommended conform with the biophysical and socioeconomic constraints that create environments within the domains, based on the philosophy that new technologies must conform with …

Teaching Weed Identification At Twenty U.S. Universities, John L. Lindquist, Peter Fay, James Nelson

Department of Agronomy and Horticulture: Faculty Publications

The methods used to teach weed identification at 20 U.S. universities were obtained for comparison through a telephone survey in December, 1986, and January, 1987. Weed identification is taught as a portion (30%) of the laboratory section in introductory weed science courses. Only five have a separate weed identification course. Field trips frequently are used to teach weed identification. Students must learn from 50 to 125 weed species with some seedling identification. Pressed plant collections of approximately 50 weed species normally are required. Most instructors strongly suggest using live plants and repetition for long-term learning.

Concetta Tm (Papconc) C.V. (Rose Plant), Ellen T. Paparozzi

Department of Agronomy and Horticulture: Faculty Publications

A new and distinct variety of rose plant of the hybrid tea rose class, which was originated as a sport of the rose Gabriella; characterized by its bright orange red, well-formed hybrid tea type blooms with dark velvet overtones on the outer edges of the open flower; disease resistant with everblooming habit and outstanding pot forcing characteristics.

The Status Of Erythronium Albidum And E. Mesochoreum (Liliaceae) In Nebraska, Robert B. Kaul

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Two species of Erythronium grow in the eastern quarter of Nebraska, but there are none elsewhere in the State. Erythronium albidum is locally abundant, mostly in upland bur oak forests, and has been collected in 18 counties since 1864. Erythronium mesochoreum is becoming rare because its habitat--virgin tall-grass prairie--is disappearing. It is known to grow now in six east-central counties, but it probably could be found in some remnant prairies in all counties south and east of the Platte and Big Blue rivers, respectively. Distributional data about these species is herein brought up to date relative to earlier published reports. …