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Vascular Flora Of The Allison Prairie, Lawrence County, Illinois, Brian R. Garrard

Masters Theses

Allison Prairie in Lawrence County, Illinois is a five acre recreation of a gravel prairie. The Allison Prairie Restoration is the largest and best remaining example of a sand and gravel prairie in the Wabash Border Natural Division of Illinois. A total of 112 species of vascular plants representing 35 families are known to exist at the Allison Prairie Restoration (Table 1). Heterotheca camporum (Greene) Shinners (golden aster), Melilotus alba Medic. (white sweet clover), and Sporobolus asper (Michx.) Kunth (dropseed) are dominants (Table 2 and 3). There is 1 gymnosperm species, Juniperus virginiana L. (red cedar), 30 monocot species and …

Francis Harper Papers, Zach S. Henderson Library Special Collections

Finding Aids

This collection consists of the professional and personal papers of Cornell-trained naturalist Dr. Francis Harper. Materials span 1904-1972 and include field notebooks, correspondence, photographs, and audiovisual materials documenting the plant and animal life as well as human ecology of the Okefenokee Swamp area of South Georgia. The photographs within Series 1 show the flora, fauna, and people of the Okefenokee swamp. The photographs were taken by the Harpers while on their trips to the swamp. Photographs are all in black and white and range in size. The Field Journals chronicle his travels in the okefenokee, Canada, and New England. Materials …

Runoff And Erosion From Interrill Areas As Affected By The Application Of Manure, John E. Gilley, Bahman Eghball, Jurg M. Blumenthal, David D. Baltensperger

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

This study was conducted to measure runoff and erosion from interrill areas as affected by the long-term application of manure and fertilizer to a Tripp sandy loam soil located near Mitchell, Nebraska. Soil which had been removed from the top 0.1 m of the soil profile was placed in a 1 m² soil pan. Rainfall was then applied to the soil pan during initial and wet simulation events. Total runoff was similar on the manure and no-manure treatments. The long-term application of manure (55 years) at a rate of 27 Mg ha^-1 (wet basis) per year did not …

Effects Of Competition On Resource Availability And Growth Of A California Bunchgrass, Andrew R. Dyer, Kevin J. Rice

Faculty Publications

In California, little is known about the sensitivity of native bunchgrasses to competition or to changes in resource availability. We investigated the effect of nonnative annual vegetation on resource availability and growth of a native bunchgrass, Nassella pulchra, in a pair of factorial field experiments that incorporated effects of both interspecific and intraspecific competition as well as variation in soil depth. Plots of differing target densities and neighborhoods were used to assess changes in aboveground (light) and belowground (water) resource availability over multiple seasons in two sites with differing soil depth. N. pulchra grown without interspecific competitors grew larger …

Nebline, January 1999

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

This year I resolve...
Ten steps to good gardening
Lilac renewal
Protect trees from animal damage
Winter care of houseplants
Dispersal of blackbirds, crows and starlings from urban roosts
Environmental book review for kids
Beginning beekeeping training
Treasures in the trash
Tips to enhance the art of using snap-traps for mice
Attention land owners and renters
1999 integrated crop management winter programs
Grain stubble rental rates
Learn about soil fertility/crop nutrient needs in your spare time
Farm tractor, combine fires cost millions annually
Controlling eastern redcedar
Tractor safety tips (part 1)
Acreage reply
Rural living clinics scheduled
Use information at …

Influence Of Prairie Dogs On Vegetation In Kansas Shortgrass Prairie, Stephen L. Winter, Jack F. Cully Jr., Jeffrey S. Pontius

United States Fish and Wildlife Service: Publications

We quantified plant species richness, frequency, percent cover and percent bare ground on black-tailed prairie dog colonies and non-colonized areas in southwest Kansas in 1996 and 1997. In 1996 field sampling occurred after 12 months of below-average precipitation, while field sampling in 1997 occurred after 10 months of above-average precipitation. In 1996 prairie dog colonies were characterized by lower percentages of grass cover and higher percentages of forb cover than non-colonized sites, but there was no difference in percent bare ground. In 1997 percent grass cover, forb cover and bare ground was similar for prairie dog colonies and non-colonized areas. …

Isolates Of Uromyces Appendiculatus With Specific Virulence To Landraces Of Phaseolus Vulgaris Of Andean Origin, Craig M. Sandlin, James R. Steadman, Carlos M. Araya, Dermot P. Coyne

Department of Plant Pathology: Faculty Publications

Five isolates of the bean rust fungus Uromyces appendiculatus were shown to be specifically virulent on bean genotypes of Andean origin. This specificity was demonstrated by the virulence of five pairs of isolates on a differential set of 30 Phaseolus vulgaris landraces. Each isolate pair was from a different country in the Americas and consisted of one Andean-specific isolate and one nonspecific isolate. Of the differential P. vulgaris landraces, 15 were of Middle American origin and 15 were of Andean origin. The Andean-specific rust isolates were highly virulent on Andean landraces but not on landraces of Middle American origin. …

Effect Of Leaf Phosphorus And Potassium Concentration On Chlorophyll Meter Reading In Rice, Shaobing Peng, Arnel L. Sanico, Felipe V. Garcia, Rebecca C. Laza, Romeo M. Visperas, Josue P. Descalsota, Kenneth G. Cassman

Department of Agronomy and Horticulture: Faculty Publications

Chlorophyll meter (SPAD) is a convenient tool to estimate leaf nitrogen (N) concentration of rice plants. There is no information on the effects of leaf phosphorus (P) and potassium (K) concentration on SP AD readings and on the relationship between SPAD values and leaf N concentration in the literature. In 1996 dry season, cv IR72 was grown at the International Rice Research Institute (IRRI) and the Philippine Rice Research Institute (PhilRice) under various N, P and K fertilizer combinations. SPAD measurements were made on the topmost fully expanded leaves at mid-tillering and panicle initiation. The leaves were then detached, dried …

Loci Controlling Resistance To High Plains Virus And Wheat Streak Mosaic Virus In A B73 × Mo17 Population Of Maize, A. Marçon, S. M. Kaeppler, S. G. Jensen, L. Senior, C. Stuber

Department of Agronomy and Horticulture: Faculty Publications

High Plains disease has the potential to cause significant yield loss in susceptible corn (Zea mays L.) and wheat (Triticum aestivum L.) genotypes, especially in the central and western USA. The primary causal agent, High Plains virus (HPV), is vectored by wheat curl mite (WCM; Aceria tossicheila Keifer), which is also the vector of wheat streak mosaic virus (WSMV). In general, the two diseases occur together as a mixed infection in the field. The objective of this research was to characterize the inheritance of HPV and WSMV resistance using B73 (resistant to HPV and WSMV) × Mo17 (moderately …

Effects Of Sludge Application On Prairie Establishment, Brenda Joan Durbahn

Dissertations and Theses @ UNI

Native prairie in Iowa has all but disappeared since the development of agricultural land by European settlers over the past 165 years. Reconstructing prairie is one way to replace some of the acreage that was lost. A byproduct of settling an area is the generation of garbage and other wastes. Currently there is a surplus of sludge, the waste product of waste water treatment facilities. This material is usually disposed of in landfills, used on agricultural land or reclamation projects.

A small area of prairie was reconstructed on the top of a closed portion of the Black Hawk County Solid …

New Floristic Records For The Grid Squares (A4, B4), Bi̇lgi̇n Gökcüoğlu, Fatma Özdemi̇r, Mustafa Aydoğdu

Turkish Journal of Botany

No abstract provided.

Variations In Sphaerocarpos (Marcantiopsida) In Arkansas, Timothy A. Golden, Daniel L. Marsh

Journal of the Arkansas Academy of Science

No abstract provided.

Occurrences Of Petalphyllum (Fossombroniaceae) In The Interior Highlands Of Arkansas, Jared W. Kyzer, Daniel L. Marsh

Journal of the Arkansas Academy of Science

No abstract provided.

The Use Of Bauxite Residue As A Soil Amendment In The Peel -Harvey Coastal Plain Catchment - Environmental Monitoring Report August 1999, Mark Rivers

Natural resources published reports

The Peel-Harvey Coastal Plain Catchment is located immediately south of Perth in Western Australia and covers approximately 190,000 ha. It extends from Forrestdale in the north to Harvey in the south, and west from the Darling Scarp to Mandurah on the coast. The boundary of the catchment, as illustrated in Figure 1, represents the area which has been approved by the DEP for the broadscale application of Alkaloam as a soil amendment. (This figure also indicates features and regions of importance in this project).

The region experiences a Mediterranean climate with hot, dry summers and mild, wet winters with most …

Bulletin 4397 - Stone Fruit From Western Australia - At A Glance, Glynn Ward, Geraldine Pasqual, Eleanor Melvin-Carter

Bulletins 4000 -

Western Australia produces a range of horticultural commodities including fruit, vegetables, flowers, nursery products and wine as part of its fast growing $400 million horticultural industry. Natural advantages such as climate and clean environment, soils and water make Western Australia an ideal place to supply a variety of high quality produce to domestic and international markets.

The stone fruit industry in Western Australia is booming with large production increases predicted. Production from well established plum, peach and nectarine orchards in 1996/97 is estimated at $17 million and exports have doubled in the past five years to $10 million in 1998/99. …

New Floristic Records For The Squares B3 And B4 (Ilgın-Konya, Turkey), Memduh Seri̇n, Kuddisi Ertuğrul

Turkish Journal of Botany

No abstract provided.

Effects On Commercial Broiler Chicks Of Constant Exposure To Ultraviolet Light From Insect Traps, Jerome Hogsette, Henry Wilson

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

Constant exposure of newly hatched Avian x Avian broilers to ultraviolet light from insect traps for 42 d resulted in no significant differences in mortality, weight gain, feed consumption, or feed conversion. Birds were exposed to greater intensities of ultraviolet light for longer periods than could be expected under commercial conditions. Although house flies are rarely a problem in broiler houses, our results indicate that insect traps with ultraviolet light as an attractant would not be detrimental to production of broilers. The need for additional testing of light traps for nuisance fly control in commercial broiler houses is discussed.

The Reproductive Biology And Effective Pollinators Of The Endangered Beardtongue Penstemon Penlandii (Scrophulariaceae), Vincent J. Tepedino, Sedonia D. Sipes, Terry L. Griswold

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

Penland's beardtongue, a rare endemic plant of the Colorado Plateau, displays a mixed breeding system. Plants are partially self-compatible but set more fruits when cross-pollinated than when self-pollinated. Fruit production is significantly increased by pollinators. However, in two years of study there was no indication that fruit set was being limited by inadequate pollinator visitation. Pollinator effectiveness was judged by correlating bee behavior at the flowers with analysis of the pollen carried on bee bodies. The most important pollinators were native megachilid bees, particularly in the genus Osmia. The bees that pollinate Penland's beardtongue are essential to its reproduction …

Report Of The Brassica Crops Working Group, Chris Neeser

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

The Brassicaceae family comprises about 3000 species, the majority of which are found in the Northern Hemisphere. Many common agricultural weeds, such as Brassica nigra (L.) Koch, Brassica rapa L., Cardaria draba (L.) Desv., Raphanus raphanistrum L., and Sinapis arvensis L., belong to this family. The most important crop species from this family are the oilseed Brassicas; Brassica napus L., B rapa L., and B juncea Coss., which are generally referred to as rapeseed, oilseed rape, or canola. Other widely cultivated species in this family are: B. oleracea L. (cabbage, kale, kohlrabi, Brussels sprouts, cauliflower, and broccoli), B. chinensis L. …

Report Of The Grains Working Group (Rice, Sorghum And Wheat), Donna Mitten

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

The grains working group identified three crops which have sexually compatible weedy relatives likely to be subject to gene flow in US agricultural systems (Table 1). The ease of cross pollination and the successful production of a fertile hybrid vary with each case. If the selective advantage of an introduced trait is positive, however, introgression of the new trait into an existing weed population is possible. The risk of ecological harm is then dependent upon the habitat of the weed. In the crop-weed complexes considered here, in which the habitat of the weedy relative is limited to agricultural systems, the …

The Response Of Muskmelon Growth And Development To Microclimate Modification By Shelterbelts, Dongsheng Zheng, James R. Brandle, Laurie Hodges, Entin Daningsih, Kenneth G. Hubbard

Department of Agronomy and Horticulture: Faculty Publications

The relationships between shelterbelt (tree windbreak)-induced microclimate and muskmelon (Cucumis melo L.) growth and development were investigated at the Univ. of Nebraska-Lincoln Agricultural Research and Development Center near Mead, Nebr., during the 1992 and 1993 growing seasons. Wind speed, wind direction, air and soil temperatures, relative humidity, and soil moisture were monitored in both sheltered and nonsheltered areas. Plant growth parameters (plant height, vine length, plant dry weight, and leaf area) were measured at various stages of development. Shelterbelts provided improved growing conditions for muskmelon transplants. Direct wind damage and duration of higher wind speeds were reduced 47% to …

Stability Of Corn (Zea Mays)- Foxtail (Setaria Spp.) Interference Relationships, John L. Lindquist, David A. Mortensen, Philip Westra, W. J. Lambert, Thomas T. Bauman, Jason Fausey, James Kells, Steven Langton, R. Gordon Harvey, Brett H. Bussler, Kevin Banken, Sharon Clay, Frank Forcella

Department of Agronomy and Horticulture: Faculty Publications

Variation in interference relationships have been shown for a number of crop-weed associations and may have an important effect on the implementation of decision support systems for weed management. Multiyear field experiments were conducted at eight locations to determine the stability of corn-foxtail interference relationships across years and locations. Two coefficients (I and A) of a rectangular hyperbola equation were estimated for each data set using nonlinear regression procedures. The I and A coefficients represent percent corn yield loss as foxtail density approaches zero and maximum percent corn yield loss, respectively. The coefficient I was stable across years …

Native Wildflower Establishment With Imidazolinone Herbicides, Daniel D. Beran, Roch E. Gaussoin, Robert A. Masters

Department of Agronomy and Horticulture: Faculty Publications

Native wildflowers are important components of grassland communities and low-maintenance wildflower seed mixtures. Weed interference limits successful establishment of native wildflowers from seed. Experiments were conducted to determine the influence of the imidazolinone herbicides imazethapyr, imazapic, and imazaquin on the establishment of blackeyed susan (Rudbeckia hirta L.), upright prairieconeflower [Ratibida columnifera (Nutt) Woot. and Standl.], spiked liatris [Liatris spicata (L.) Willd.], blanket flower (Gaillardia aristata Pursh.), purple coneflower [Echinacea purpurea (L.) Moench.], and spotted beebalm (Monarda punctata L.). Wildflower response to the herbicide treatments was variable and appeared to be influenced by the level …

A Review Of Issues Pertaining To Transgenic Turfgrasses, Paul G. Johnson, Terrance P. Riordan

Department of Agronomy and Horticulture: Faculty Publications

Recombinant DNA technology is a rapidly growing field in plant and animal breeding. This technology involves the transfer of pieces of DNA, or genes, regardless of the organisms involved or how they are related. Transformation procedures in plants were first developed for important crop and model plant systems. Although turfgrass management and production is one of the fastest growing areas of agriculture, genetic transformation of turfgrasses lags behind that of many other important crop plants. Turfgrasses are becoming more important primarily because of their association with the ever-increasing urban population. The size of the turfgrass seed market is second only …

Measurement Of Sorghum Stalk Strength Using The Missouri-Modified Electronic Rind Penetrometer, Jeffrey F. Pedersen, J. J. Toy

Department of Agronomy and Horticulture: Faculty Publications

Resistance to lodging is critical in sorghum [Sorghum bicolor (L.) Moench] grown for grain, yet adequate tools for plant breeders to assess this character at or before anthesis have not been developed. The objective of this study was to evaluate whether an electronic penetrometer previously shown to be an effective tool for measuring stalk strength in maize (Zea mays L.) could be usedd to differentiate among grain sorghum hybrids. Entries in three commercial grain sorghum hybrid trials were evaluated for rind penetrometer resistance (RPR) of the peduncle, the lower stalk anthesis and the lower stalk at maturity. Actual …

Comparison Of Common Cytotypes Of Andropogon Gerardii (Andropogoneae, Poaceae), Kathleen H. Keeler, Geoffrey A. Davis

School of Biological Sciences: Faculty Publications

Many plant species contain populations with more than one polyploid cytotype, but little is known of the mechanisms maintaining several cytotypes in a population. Andropogon gerardii cytotypes were compared to evaluate different models of autopolyploid cytotype coexistence. The enneaploid (90 chromosome, 9x) cytotype was found to be larger and taller than the hexaploid (60 chromosome, 6x) cytotype. Seed production is significantly more efficient in hexaploids, but seed production per area was not significantly different. The two cytotypes are not exomorphologically separable in the field because of great plasticity in response to environmental variation and wide variation …

Plant Hybrid Zones And Insect Host Range Expansion, Diana Pilson

Diana Pilson Publications

The hybrid bridge hypothesis suggests that plant hybrids ‘‘bridge’’ the genetic gap between actual and potential host species, and that, for this reason, herbivorous insects are more likely to evolve an expanded host range in the presence of hybrids. While intuitively appealing, the hypothesis has two implicit assumptions: that phenotypic gaps between potential hosts limit host range, and that characters controlling host use are additively inherited in plant hybrids. Evaluation of these assumptions suggests that operation of the hybrid bridge hypothesis is relatively uncommon. In addition, the hypothesis has not been well integrated into existing theoretical and empirical work on …

The Concept Of Familiarity And Pest Resistant Plants, Karen Hokanson, David Heron, Subhash Gupta, Susan Koehler, Craig Roseland, Shanthu Shantharam, John Turner, James White, Michael Schechtman, Sally Mccammon, Rebecca Bech

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

Meetings such as this workshop provide an all too rare opportunity for scientists from different disciplines to share their perspectives on a topic of common interest. In this case we examine the use of pest resistant plants in managed ecosystems. USDA-APHIS has a clear interest in this subject because it is involved in regulating transgenic plants, many of which have been engineered with some sort of pest resistance, within its broad authority to protect plants under the Federal Plant Pest Act and the Plant Quarantine Act. Since 1992, when APHIS received its first request to determine non-regulated status for a …

Report Of The Cucurbit Working Group, James D. Mccreight, Jack Staub

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

Cucumber (Cucumis sativus L.) originated in India, melon (C. melo L.) and watermelon (Citrullus lanatus) in Africa, and squash, pumpkin, and gourd (Cucurbita spp.) in the Americas. Thus, cucumber, melon, and watermelon (including citron) are relatively recent introductions to the New World. Most domesticated species of Cucurbita were introduced from Mexico, Central America, and South America with the migration of native Americans centuries earlier. Wax gourd (Benincasa hispida (Thunb.) Logr.) is from Southeast Asia. Bottle gourd (Lagenaria siceraria (Molina) Stand.) is of African origin. South Asia is the probable center of …

Analysis Of Human Skin Emanations By Gas Chromatography/Mass Spectrometry. 1. Thermal Desorption Of Attractants For The Yellow Fever Mosquito (Aedes Aegypti) From Handled Glass Beads, Ulrich R. Bernier, Matthew M. Booth, Richard A. Yost

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

Handled glass has the ability to collect and concentrate nonaqueous human skin emanations while minimizing the collection of aqueous perspiration. Compounds originating from the skin and collected on glass have previously been found to attract the Aedes aegypti species of mosquito. Therefore, glass beads were used as the medium to collect skin emanations from humans for subsequent chemical analysis. This process consisted of a 5-15-min collection of sample on glass beads, followed by loading the beads into a gas chromatograph (GC) injector insert for subsequent desorption of the collected compounds onto the GC column. After cryofocusing by liquid nitrogen at …