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1992

University of Arkansas, Fayetteville

Articles 1 - 24 of 24

Full-Text Articles in Life Sciences

Arkansas Rice Research Studies 1991, B. R. Wells Jun 1992

Arkansas Rice Research Studies 1991, B. R. Wells

Arkansas Agricultural Experiment Station Research Series

The research reports in this publication represent one year of results; therefore, these results should not be used as a basis for longterm recommendations. Several research reports in this publication dealing with soil fertility also appear in Arkansas Soil Fertility Studies 1991, Arkansas Agricultural Experiment Station Research Series 421. This duplication is the result of the overlap in research coverage between the two series and our effort to inform Arkansas rice producers of all the research being conducted with funds from the rice check-off.

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Arkansas Soil Fertility Studies 1991, Wayne E. Sabbe May 1992

Arkansas Soil Fertility Studies 1991, Wayne E. Sabbe

Arkansas Agricultural Experiment Station Research Series

Contained within this publication are progress reports on the specific aspects of the soil fertility program at the University of Arkansas in 1991. In most instances, the reports are not final reports, but they may contain data from several years. Further details on each report can be obtained from the respective project leaders.

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Herbicide Trials On Field Crops 1991, Robert Frans, Marilyn Mcclelland, David Jordan Mar 1992

Herbicide Trials On Field Crops 1991, Robert Frans, Marilyn Mcclelland, David Jordan

Arkansas Agricultural Experiment Station Research Series

Herbicidal weed control is economically important for production of field crops. Field experiments are conducted annually in Arkansas to evaluate the activity of developmental ancommercial herbicides for selective control of weeds in several important crops. These experiments serve both industry and Arkansas agriculture by providing information on the selectivity of herbicides still in the developmental stage and by comparing the activity of these new herbicides with that of recommended herbicides.

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Arkansas Cotton Variety And Strain Tests 1991, F. M. Bourland, J. S. Dacus Feb 1992

Arkansas Cotton Variety And Strain Tests 1991, F. M. Bourland, J. S. Dacus

Arkansas Agricultural Experiment Station Research Series

Varieties and advanced strains of cotton were evaluated in 1991 by the Arkansas Agricultural Experiment Station. Varieties and some advanced breeding lines were evaluated in the 1991 Arkansas Cotton Variety Test. Entries in the 1991 Commercial Cotton Strain Test included both released varieties that have not been evaluated in Arkansas and advanced breeding lines that may soon be available to producers.

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Forage Variety Performance Test 1990-1991, Herbert Honeycutt Feb 1992

Forage Variety Performance Test 1990-1991, Herbert Honeycutt

Arkansas Agricultural Experiment Station Research Series

This report summarizes the results of forage variety tests that were conducted at the Main Agricultural Experiment Station at Fayetteville, Arkansas; the Strawberry Substation near Bald Knob, Arkansas; and the Livestock and Forestry Branch Station near Batesville, Arkansas.

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Using Physical, Chemical And Biological Indicators To Assess Water Quality On The Ouachita National Forest Utilizing Basin Area Stream Survey Methods, J. Alan Clingenpeel, Betty G. Cochran Jan 1992

Using Physical, Chemical And Biological Indicators To Assess Water Quality On The Ouachita National Forest Utilizing Basin Area Stream Survey Methods, J. Alan Clingenpeel, Betty G. Cochran

Journal of the Arkansas Academy of Science

The Ouachita National Forest (ONF) has developed a series of Best Management Practices (BMP's) designed to protect water quality and associated beneficial uses (fisheries, municipal water supplies, etc.). A monitoring program is necessary to document the effectiveness of that protection. The Basin Area Stream Survey (BASS) methodology provides a monitoring link from BMP's to the aquatic ecosystems. The goal of BASS is to identify the physical, chemical and biological characteristics of a stream in a format that will allow comparisons with other streams, and indicate when a stream is being impacted. Six index streams within two ecoregions were selected and …

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The 1991 Field Evaluation Of Herbicides On Small Fruit, Vegetables And Ornamental Crops, R. E. Talbert, R. A. Wichert, V. F. Carey Iii, D. H. Johnson, D. F. Ruff, J. A. Kendig Jan 1992

The 1991 Field Evaluation Of Herbicides On Small Fruit, Vegetables And Ornamental Crops, R. E. Talbert, R. A. Wichert, V. F. Carey Iii, D. H. Johnson, D. F. Ruff, J. A. Kendig

Arkansas Agricultural Experiment Station Research Series

The establishment of this field-testing procedure provides the chemical industry, through its partial support, and the Arkansas Experiment Station the opportunity to evaluate herbicide performance on small fruit, vegetable and ornamental crops grown under Arkansas conditions. This report also provides a means for disseminating information to interested people and public-service weed scientists.

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Zooplankton Community Abundance And Diversity In Dardanelle Reservoir, Arkansas, 1981-1990, John D. Rickett, Robert L. Watson Jan 1992

Zooplankton Community Abundance And Diversity In Dardanelle Reservoir, Arkansas, 1981-1990, John D. Rickett, Robert L. Watson

Journal of the Arkansas Academy of Science

Zooplankton samples were collected quarterly from five stations representing the discharge bay and four "control" or "dispersing impact" stations. Rotifers dominated all samples numerically and by the number of taxa. All major groups (Rotifera, Cladocera, Copepoda, and Protozoa) exhibited greatest abundances during the summer. Quarterly variations in abundance and number of taxa were documented. Except for an increase in taxonomic analysis detail between 1981 and 1984 resulting in several more taxa added to the list, no long-term increases, declines or repeating cycles were apparent. Margalef's Richness Index reflected this change and showed a long-term increase with evidence of a 5- …

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Distributional Survey Of The Bird-Voiced Treefrog, Hyla Avivoca (Anura: Hylidae), In Arkansas, Stanley E. Trauth Jan 1992

Distributional Survey Of The Bird-Voiced Treefrog, Hyla Avivoca (Anura: Hylidae), In Arkansas, Stanley E. Trauth

Journal of the Arkansas Academy of Science

A field study of the bird-voiced treefrog, Hyla avivoca, was conducted in Arkansas during the summer of 1991. A total of 75 separate sites in 23 counties was visited. Males with their distinctive whistle-like calls were listened for at night at each site. Breeding colonies of Hyla avivoca were found in four of the six major river basins; the study established three new county records. Currently, this species has been documented at 14 sites in 10 counties; in very few situations were the treefrogs locally abundant (voucher specimens deposited in the Arkansas State University Museum of Zoology). Habitat perturbation and …

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Synopsis Of The Genus Tropisternus (Coleoptera Hydrophilidae) In Arkansas, George L. Harp Jan 1992

Synopsis Of The Genus Tropisternus (Coleoptera Hydrophilidae) In Arkansas, George L. Harp

Journal of the Arkansas Academy of Science

No abstract provided.

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Effect Of Bacterial Lipopolysaccharide-Induced Fever On The Humoral Response Of New Zealand White Rabbits, Lawrence W. Hinck, Stanley N. David Jan 1992

Effect Of Bacterial Lipopolysaccharide-Induced Fever On The Humoral Response Of New Zealand White Rabbits, Lawrence W. Hinck, Stanley N. David

Journal of the Arkansas Academy of Science

No abstract provided.

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Measuring Shrubland Vegetational Structure Using Avian Habitats As An Example, Douglas A. James Jan 1992

Measuring Shrubland Vegetational Structure Using Avian Habitats As An Example, Douglas A. James

Journal of the Arkansas Academy of Science

Vegetational sampling of avian habitats stresses the use of methods primarily designed for forest birds. This paper describes a technique for sampling vegetational structure in uneven patchy habitats such as shrublands. Using the method, avian habitats in old field shrublands of northwestern Arkansas were analyzed.

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Long-Term White-Tailed Deer Harvest Trends For The Southcentral United States, Richard A. Kluender, Philip A. Tappe, Michael E. Cartwright Jan 1992

Long-Term White-Tailed Deer Harvest Trends For The Southcentral United States, Richard A. Kluender, Philip A. Tappe, Michael E. Cartwright

Journal of the Arkansas Academy of Science

White-tailed deer herd size across the southcentral states continues to increase. Concurrent with this increase has come a total harvest level increase for most states. Southcentral states have increased bag limits on antlerless deer to insure that herd health is maintained as herd sizes approach total carrying capacity. Harvest growth rates, however, show irregularities from year to year. The cyclic pattern of harvest (and population) growth rate is of shorter duration than would be expected in a large ungulate population. An exogenous influence is suspected. Cyclic patterns in harvest growth rates move opposite the growth rate of epizootic hemorrhagic disease …

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Phytoplankton Community Abundance And Diversity In Dardanelle Reservoir, Arkansas, 1981-1990, John D. Rickett, Robert L. Watson Jan 1992

Phytoplankton Community Abundance And Diversity In Dardanelle Reservoir, Arkansas, 1981-1990, John D. Rickett, Robert L. Watson

Journal of the Arkansas Academy of Science

Phytoplankton samples were collected quarterly from 1981-1990 at five stations representing discharge water from Arkansas Nuclear One, a nuclear generating station, and four "control" or "dispersal evaluation" stations. Seventy-five taxa representing five divisions were identified and enumerated. Community structure was evaluated using abundances, number of taxa, and Margalef's Richness, Shannon's Heterogeneity and Pielou's Evenness indices. No long-term trends were identified, but the beginning of cyclic variations, with a 7-year periodicity, in abundance, number of taxa, and Shannon's and Pielou's indices were apparent. Margalef's index values were constant during most of the study period. For all samples, t-tests and Mann-Whitney U …

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Reproduction In The Western Mud Snake, Farancia Abacura Reinwardtii (Serpentes: Colubridae), In Arkansas, John W. Robinette, Stanley E. Trauth Jan 1992

Reproduction In The Western Mud Snake, Farancia Abacura Reinwardtii (Serpentes: Colubridae), In Arkansas, John W. Robinette, Stanley E. Trauth

Journal of the Arkansas Academy of Science

The reproductive cycle of Farancia abacura reinwardtii was studied using samples of snakes collected throughout Arkansas from 1985 to 1991 ;museum specimens were also examined. The right testis of 22 males was examined by light microscopy. Histological analysis of the testis indicated a postnuptial spermatogenic cycle. Testicular recrudescence begins in late May with sperm production peaking in late summer; sperm over winter in the ductus deferens. Ovarian follicles of 22 females were measured and counted; two follicular sizes were noted. In those undergoing primary vitellogenesis, a maximum size of 6.5 mm was reached; those exhibiting secondary vitellogenesis ranged in size …

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Status Of The Ozark Hellbender, Cryptobranchus Bishopi (Urodela: Cryptobranchidae), In The Spring River, Fulton County, Arkansas, Stanley E. Trauth, J. D. Wilhide, Patrick Daniel Jan 1992

Status Of The Ozark Hellbender, Cryptobranchus Bishopi (Urodela: Cryptobranchidae), In The Spring River, Fulton County, Arkansas, Stanley E. Trauth, J. D. Wilhide, Patrick Daniel

Journal of the Arkansas Academy of Science

We conducted a tag and release study of the Ozark hellbender along a 26 km stretch of the Spring River from mid-July through mid-November, 1991, to determine current population levels. Salamanders were collected by hand with the aid of scuba diving equipment. Thirteen visits(36 dive hrs.) to10 selected access sites yielded 20 animals. Compared to previously published data of the early 1980's which indicated large, striving populations of C. bishopi(in some cases, > 300 individuals) in the Spring River, our study found perilously low numbers of salamanders. This drastic decline may be attributed to over collection of specimens for scientific or …

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Assessment Of Timber Resource Values In Arkansas, Richard A. Williams, Richard A. Kluender Jan 1992

Assessment Of Timber Resource Values In Arkansas, Richard A. Williams, Richard A. Kluender

Journal of the Arkansas Academy of Science

The Arkansas forest lands have long been and will continue to be an important contributor to the state's economy. Today, Arkansas forests cover 52 percent of the land area (Hines and Vissage, 1988). These forests are classified by physiographic characteristics into four timber regions. The timber removed from forested lands provides direct and indirect employment for approximately 40,000 people within the Arkansas manufacturing sector (Kluender and Willett, 1989). This paper describes county and region level information, identifies standing timber volumes, net annual timber growth, net annual timber removals, and associated dollar values. Timber stand data are used to determine areas …

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Biological Vectors For The Dispersal Of Colletotrichum Gloeosporioides, X. B. Yang, D. O. Tebeest, E. L. Moore Jan 1992

Biological Vectors For The Dispersal Of Colletotrichum Gloeosporioides, X. B. Yang, D. O. Tebeest, E. L. Moore

Journal of the Arkansas Academy of Science

Green treefrogs (Hyla cinerea) and grasshoppers (Melanoplus differentialis and Conocephalus fasciatus) commonly observed in Arkansas rice fields, are dispersal vectors for Colletotrichum gloeosporioides f. sp. aeschynomens, a causal agent of anthracnose of northern jointvetch. Treefrogs and grasshoppers captured from rice or soybean fields with diseased northern jointvetch were placed in containers in contact with healthy northern jointvetch plants. An average of 90% of northern jointvetch plants was infected by the pathogen with up to 10 lesions per plant using treefrog vectors. Experiments were done in the greenhouse on frog dispersal by monitoring disease development from a point source in closed …

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Distribution Of The Southern Red-Backed Salamander, Plethodon Serratus (Caudata: Plethodontidae) In The Ouachita Mountain Region Of Arkansas, M. Doug Fletcher, Betty G. Cochran, Stanley E. Trauth, David A. Saugey Jan 1992

Distribution Of The Southern Red-Backed Salamander, Plethodon Serratus (Caudata: Plethodontidae) In The Ouachita Mountain Region Of Arkansas, M. Doug Fletcher, Betty G. Cochran, Stanley E. Trauth, David A. Saugey

Journal of the Arkansas Academy of Science

No abstract provided.

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Sequential Occupation By Red-Cockaded Woodpeckers And Red-Bellied Woodpeckers In The Ouachita National Forest, Joseph C. Neal, Warren G. Montague, Douglas A. James Jan 1992

Sequential Occupation By Red-Cockaded Woodpeckers And Red-Bellied Woodpeckers In The Ouachita National Forest, Joseph C. Neal, Warren G. Montague, Douglas A. James

Journal of the Arkansas Academy of Science

No abstract provided.

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Maternity Colony Of Gray Bats In A Non-Cave Site, Lorraine Timmerman, V. Rick Mcdaniel Jan 1992

Maternity Colony Of Gray Bats In A Non-Cave Site, Lorraine Timmerman, V. Rick Mcdaniel

Journal of the Arkansas Academy of Science

No abstract provided.

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New Records Of Vertebrates In Southwestern Arkansas, C. Renn Tumlison, Mark R. Karnes, Mark E. Clark Jan 1992

New Records Of Vertebrates In Southwestern Arkansas, C. Renn Tumlison, Mark R. Karnes, Mark E. Clark

Journal of the Arkansas Academy of Science

No abstract provided.

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Age Specific Analysis Of Food Habits For Arkansas Raccoons (Procyon Lotor), J. D. Wilhide, V. Rick Mcdaniel, C. Renn Tumlison Jan 1992

Age Specific Analysis Of Food Habits For Arkansas Raccoons (Procyon Lotor), J. D. Wilhide, V. Rick Mcdaniel, C. Renn Tumlison

Journal of the Arkansas Academy of Science

No abstract provided.

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Optimum Cone Collection Period In Arkansas For Establishing In Vitro Cultures Of Loblolly Pine (Pinus Taeda L.), Jameel M. Al-Khayri, Feng H. Huang, H. T. Zhang Jan 1992

Optimum Cone Collection Period In Arkansas For Establishing In Vitro Cultures Of Loblolly Pine (Pinus Taeda L.), Jameel M. Al-Khayri, Feng H. Huang, H. T. Zhang

Journal of the Arkansas Academy of Science

This study was conducted to determine the optimum period to collect loblolly pine (Pinus taeda L.) cones that contain embryos with the greatest capacity to produce embryogenic callus for establishing somatic embryogenesis. Cones were collected from trees at the University of Arkansas Agricultural Experiment Station, Fayetteville, in 1991 during four consecutive months: May, June, July, and August. Seeds were extracted and disinfected in 70% ethanol for 1 min, 50% Clorox for 20 min, followed by four water rinses. Seed coats were removed, and embryos were cultured on DCR medium adjusted to pH 5.7 and supplemented with 3 mg/L 2,4-D, 0.5 …

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