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Articles 1 - 30 of 179
Full-Text Articles in Entire DC Network
Wood Anatomy And Relationships Of Santalaceae I. Acanthosyris, Jodina, And Myoschilos, Carlos Alejandro Norverto
Wood Anatomy And Relationships Of Santalaceae I. Acanthosyris, Jodina, And Myoschilos, Carlos Alejandro Norverto
Aliso: A Journal of Systematic and Floristic Botany
Study of the wood of Acanthosyris, Jodina, and Myoschilos confirmed a close relationship between Santalaceae and Olacaceae. Features important for defining the three genera and for determining relationships between them and with Schoepfia, which belongs to Olacaceae, are reported for the first time: vestured vessel walls, unilaterally compound pits, perforated ray cells, and druses.
A Phytochemical Study Of Selected Podostemaceae, Virginia Romo Contreras, Ron Scogin, C. Thomas Philbrick, Alejandro Novelo R.
A Phytochemical Study Of Selected Podostemaceae, Virginia Romo Contreras, Ron Scogin, C. Thomas Philbrick, Alejandro Novelo R.
Aliso: A Journal of Systematic and Floristic Botany
Podostemum ceratophyllum contains γ-mangostin and its 6-glucoside. The aglycone is also present in Marathrum, Oserya, and Vanroyenella, but is absent from Tristicha. Anthocyanins were identified from all genera, but no additional fiavonoids were detected. Condensed and hydrolyzable tannins, iridoids, cyanogenic glycosides, and alkaloids were lacking in all Podostemaceae examined. Phytochemical constituents do not clarify the uncertain systematic affinity ofPodostemaceae, but emphasize the generally accepted taxonomic isolation of this family.
A Review Of The Classification Of The Genus Hydrastis (Ranunculaceae), Carl S. Keener
A Review Of The Classification Of The Genus Hydrastis (Ranunculaceae), Carl S. Keener
Aliso: A Journal of Systematic and Floristic Botany
The genus Hydrastis has been variously classified as a monotypic taxon in the Ranunculaceae, the Berberidaceae, the Glaucidiaceae, or its own monogeneric family, the Hydrastidaceae. The objectives of this paper were 1) to review the previous classifications of Hydrastis and 2) to critique a recent paper by Tobe and Keating reevaluating the classification of the genus based on comparative morphological and anatomical studies. One conclusion of this review was that Tobe and Keating overlooked certain important papers which might have substantially altered their conclusions, viz., that Hydrastis is sufficiently distinct from the other genera of the Ranunculaceae to warrant a …
Wood Anatomy Of Sabiaceae (S.L.), Sherwin Carlquist, Peter L. Morrell, Steven R. Manchester
Wood Anatomy Of Sabiaceae (S.L.), Sherwin Carlquist, Peter L. Morrell, Steven R. Manchester
Aliso: A Journal of Systematic and Floristic Botany
Quantitative and qualitative data were offered for 30 taxa of Meliosma and one species each of Ophiocaryon and Sabia; qualitative data were available for additional species of Meliosma and Sabia. For a small family restricted to mesic sites, Sabiaceae had a wide range of wood anatomical expressions (e.g., long scalariform to simple perforation plates; heterocellular to homocellular multiseriate rays; tracheids, fiber-tracheids, or libriform fibers as imperforate tracheary elements; presence or absence of silica bodies and calcium oxalate crystals in rays). Growth ring type, vessel diameter, vessel density, and vessel element length were sensitively related to ecology, but to …
Laboulbeniales On Semiaquatic Heteroptera. Vi. The Genus Tavaresiella, Richard K. Benjamin
Laboulbeniales On Semiaquatic Heteroptera. Vi. The Genus Tavaresiella, Richard K. Benjamin
Aliso: A Journal of Systematic and Floristic Botany
Majewski's original circumscriptions of Tavaresiella (Laboulbeniales; Laboulbeniaceae; Stigmatomycetinae) and its type species, T. hebri, were emended in this study of the genus. In addition, three new species were described, T. majewskii, T. polhemi, and T. santamariae. These, like the type species, occurred on true bugs of the family Hebridae (Heteroptera). A key to the species was provided, and ali were described and illustrated with line drawings and photographs. Aspects of ascomatic structure and development were summarized, and the genus was compared with other genera of the subtribe having similar characteristics.
Northeast Research Station Watertown, South Dakota Annual Progress Report, 1993, Agricultural Experiment Station, Plant Science Department
Northeast Research Station Watertown, South Dakota Annual Progress Report, 1993, Agricultural Experiment Station, Plant Science Department
Agricultural Experiment Station and Research Farm Annual Reports
This is the 1993 annual progress report for the Northeast Research Station in Watertown, South Dakota. This report is issued by the South Dakota Agricultural Experiment Station and the South Dakota State University Plant Science Department. This report includes information on the 1993 crop season, including growing season precipitation data from 1956-1993, information on the wheat scab epidemic of 1993, crop performance trials, oat and rye research, spring wheat breeding, alfalfa yield test and breeding for wildlife habitat, soybean studies, W.E.E.D. project demonstration, farming system studies, 1993 yields, soil moisture and soil tests results, and soybean breeding.
Avicennia Germinans (L.) Stearn, Steven R. Hill, D. Bradshaw, I. Renne
Avicennia Germinans (L.) Stearn, Steven R. Hill, D. Bradshaw, I. Renne
Specimens by Name
No abstract provided.
Lupin Logic Number 41
Lupin Logic
Content:
Kiev lupins for export
Lupin variety recommendations for 1994
Stubble grazing
Storage of lupin information
Resistance to testing?
Christmas message
193/94 Estimateed lupin equities
Southeast South Dakota Experiment Farm Annual Progress Report, 1993, Agricultural Experiment Station
Southeast South Dakota Experiment Farm Annual Progress Report, 1993, Agricultural Experiment Station
Agricultural Experiment Station and Research Farm Annual Reports
This thirty-third annual report of the research program at the Southeast South Dakota Experiment Farm has special significance for those engaged in agriculture and the agriculturally related businesses in the nine county area of southeast South Dakota. Reports in this document include information on: temperatures and precipitation data, corn production and performance, soybean research and planting, soil testing, alfalfa yield test, fertilizer testing, herbicide research, crop rotation, sorghum, small grains, livestock research, and pest and weed control.
The Prairie Naturalist Volume 25. No. 4. December 1993
The Prairie Naturalist Volume 25. No. 4. December 1993
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
CONTENTS
FACTORS INFLUENCING DEER/VEHICLE MORTALITY IN EAST CENTRAL SOUTH DAKOTA ▪ J. S. Gleason and J. A. Jenks
PRONGHORN SKULL FOUND ALONG EDGE OF HISTORIC EASTERN DISTRIBUTION IN NORTH DAKOTA ▪ W. F. Jensen and R. W. Seabloom
SOREX MERRIAMI IN NEBRASKA ▪ P. W. Freeman, J. D. Druecker, and S. Tvrz
ARE DEER MICE A COMMON PREY OF COYOTES? ▪ G. A. Kaufman, D. E. Brillhart, and D. W. Kaufman
EFFECT OF PRAIRIE-FIRE ASH ON FOOD CHOICE BY DEER MICE AND HISPID COTTON RATS …
Fractal Description Of Soil Fragmentation For Various Tillage Methods And Crop Sequences, Bahman Eghball, Lloyd N. Mielke, Guillermo A. Calvo, Wallace Wilhelm
Fractal Description Of Soil Fragmentation For Various Tillage Methods And Crop Sequences, Bahman Eghball, Lloyd N. Mielke, Guillermo A. Calvo, Wallace Wilhelm
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Soil structure has been difficult to quantify and, at best, has been studied semiquantitatively. Fractal representation of soil fragmentation can provide an indication of soil structure. The purpose of our study was to use fractal analysis to quantify soil fragmentation under various tillage and crop sequence treatments at different times during the growing season. We collected soil samples from four tillage treatments (established 10 yr earlier) of chisel, disk, no-till, and moldboard plow in factorial arrangement with two crop sequences of corn (Zea mays L.)-soybean [Glycine max (L.) Merr.]-corn (C-SC), and soybean- cornaoybean, (S-C-S) on a Sharpsburg (fine, …
Lupin Logic Number 40
Lupin Logic
Contents
Albus lupin warning
Market outlook
Seed quality testing
Binder and index
Furrow seeding
Above-Ground Vegetative Development And Growth Of Winter Wheat As Influenced By Nitrogen And Water Availability, Wallace Wilhelm, Gregory S. Mcmaster, R. W. Rickman, Betty Klepper
Above-Ground Vegetative Development And Growth Of Winter Wheat As Influenced By Nitrogen And Water Availability, Wallace Wilhelm, Gregory S. Mcmaster, R. W. Rickman, Betty Klepper
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Assessing the influence of nitrogen and water availability on development and growth of individual organs of winter wheat (Triticum aestivum L.) is critical in evaluating the response of wheat to environmental conditions. We constructed a simulation model (SHOOTGRO 2.0) of shoot vegetative development and growth from planting to early boot by adding nitrogen and water balances and response functions for seedling emergence, tiller and leaf appearance, leaf and internode growth, and leaf and tiller senescence to the existing wheat development and growth model, SHOOTGRO 1.0. Model inputs include daily maximum and minimum air temperature, rainfall, daily photosynthetically active radiation, …
Residual Effects Of No-Till Crop Residues On Corn Yield And Nitrogen Uptake, M. S. Maskina, James F. Power, John W. Doran, Wallace Wilhelm
Residual Effects Of No-Till Crop Residues On Corn Yield And Nitrogen Uptake, M. S. Maskina, James F. Power, John W. Doran, Wallace Wilhelm
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
The residual effects of crop residues on N availability and crop growth are largely unknown. A field experiment was conducted from 1986 through 1988 at Lincoln, NE, to determine the residual effects on no-till corn (Zea mays L.) production and N uptake of 0,50, 100, and 1509'0 of the amount of crop residues produced by the previous crop during the previous 5 yr. These effects were evaluated with and without tillage (disking), N fertilizer (60 kg N ha-1), and hairy vetch (Vicia villosa Roth ssp. villosa, 'Madison') winter cover crop. Increasing the previous crop residue …
Paw Paw Asimina Triloba (L.) Dunal., Gene Silberhorn
Paw Paw Asimina Triloba (L.) Dunal., Gene Silberhorn
Reports
The Wetland Flora Technical Report series provides concise information regarding the identification, growth habits, distribution, habitat, ecology and wetland indicator status for the title species. Illustrations are also included to aid in specimen identification.
Lupin Logic Number 39
Lupin Logic
Contents
Lunar landscape
- Rhizoctonia patch
- Eradu patch
- Action required
Back saving bin
Row orientation
Manganese spraying
Reminders
Correction
1992/93 Pool payments
An Improved Measure Of Angular Dispersion In Plant Neighborhoods, Klaus J. Puettmann, Dan Rhode, Bruce D. Maxwell, John L. Lindquist
An Improved Measure Of Angular Dispersion In Plant Neighborhoods, Klaus J. Puettmann, Dan Rhode, Bruce D. Maxwell, John L. Lindquist
Department of Agronomy and Horticulture: Faculty Publications
Spatial distribution is an important factor determining the intensity and outcome of plant competition. The commonly used measure of angular distributions of plants around a target plant (1 - r) is shown to be limited to unimodal distributions. We present a new index which is based on the variance of the differences between the azimuth of neighboring plants. The new index is an improvement as it characterizes the angular dispersion in both unimodal and multimodal distributions.
Effect Of Topping Time On Dark Tobacco Yield, Bill Maksymowicz
Effect Of Topping Time On Dark Tobacco Yield, Bill Maksymowicz
Agronomy Notes
When the terminal bud is removed from tobacco by topping, a number of changes are triggered in the plant: increased root growth, nicotine synthesis, improved drought tolerance, and leaf expansion and increased thickness. These changes are affected by topping time; generally there will be less crop response to topping as topping is delayed. The most important changes, from a producer's perspective, are continued leaf expansion and thickening, with a commensurate improvement in quality and increase in yield. Topping at the proper time of plant development is often difficult on a field scale since uneven crop growth, particularly when tobacco is …
Analysis Of Black Point In Wheat, J M. Wilson
Analysis Of Black Point In Wheat, J M. Wilson
Technical Bulletins
Fungal staining (black point) of wheat can reduce the quality of grain. The most serious problem is a discolouration of products. Discolouration is a consequence of infection by microorganisms. The most likely cause in Western Australia is a species of the common fungus Alternaria. Infection and discolouration occur between flowering and grain maturity, and the optimum environmental conditions are probably consecutive days of high relative humidity together with warm temperatures.
Corallorhiza Odontorhiza Nutt., John E. Ebinger
Corallorhiza Odontorhiza Nutt., John E. Ebinger
Specimens by Name
No abstract provided.
Effect Of Organic Matter Decomposition Level On Bacterial Species Diversity And Composition In Relationship To Pythium Damping-Off Severity, Michael J. Boehm, L.V. Mdden, H.A.J. Hoitink
Effect Of Organic Matter Decomposition Level On Bacterial Species Diversity And Composition In Relationship To Pythium Damping-Off Severity, Michael J. Boehm, L.V. Mdden, H.A.J. Hoitink
Department of Plant Pathology: Faculty Publications
Rhizosphere bacteria were isolated from root tip segments of cucumber seedlings grown in a suppressive, slightly decomposed light-colored peat mix, a conducive, more decomposed dark-colored peat mix, and a suppressive dark peat mix amended with composted hardwood bark. The bacteria were identified by a gas chromatographic fatty acid methyl ester analysis. The total number of taxa recovered from a single root tip segment ranged from 9 to 18. No single taxon predominated on all root tip segments harvested from any of the mixes. The highest relative population density reached by a given taxon on any root tip segment was 45%. …
The Prairie Naturalist Volume 25, No. 3 September 1993
The Prairie Naturalist Volume 25, No. 3 September 1993
The Prairie Naturalist
Paul B. Kannowski, Editor
Nikki R. Seabloom, Assistant Editor
Douglas H. Johnson, Book Review Editor
CONTENTS
AVAILABILITY OF EARTHWORMS AND SCARAB BEETLES TO SANDHILL CRANES IN NATIVE GRASSLANDS ALONG THE PLATTE RIVER ▪ C. A. Davis and P. A. Vohs
BLACK TERN COLONIZATION OF A RESTORED PRAIRIE WETLAND IN NORTHWESTERN MINNESOTA ▪ D. J. Delehanty and W. D. Svedarsky
MOUNTAIN PLOVER HABITAT SELECTION IN THE POWDER RIVER BASIN, WYOMING ▪ T. L. Parrish, S. R. Anderson, and W. F. Oelklaus
POST-HATCH BROOD AMALGAMATION IN LESSER SCAUP: FEMALE BEHAVIOR AND RETURN RATES AND DUCKLING SURVIVAL ▪ A. D. Afton
STATUS AND …
Managing For Stubble Retention, Linda Leonard
Managing For Stubble Retention, Linda Leonard
Bulletins 4000 -
One of the objectives of sustainable farming systems is to retain as much cover on the soil as possible – this helps to maintain soil structure and protects the soil from erosion.
Improving productivity, maintaining soil structure, and stabilising fragile soils are some of the desired aims of farming. Sound rotations, reduced tillage, effective use of herbicides, maintenance of ground cover and careful management of stock are part of the management process used in achieving these goals.
This Bulletin provides an introduction to stubble retention systems. Its purpose is to create an awareness of the benefits and principles of stubble …
Lupin Logic Number 38
Lupin Logic
Contents
Attitudes to dry seeding lupins
Communication corrections
Liming and lupins
- Editors note
CMV testing 1993/94
- Changes for 1993
Reminders
1992/93 Pool payments
Sources Of Variation In The Spectrophotomteric Assay Of Hydrocyanic Potential In Sorghum Seedlings, R. D. Lee, B. E. Johnson, J. F. Pedersen, Francis A. Haskins, Herman J. Gorz
Sources Of Variation In The Spectrophotomteric Assay Of Hydrocyanic Potential In Sorghum Seedlings, R. D. Lee, B. E. Johnson, J. F. Pedersen, Francis A. Haskins, Herman J. Gorz
Department of Agronomy and Horticulture: Faculty Publications
Spectrophotometry is a useful assay for hydrocyanic acid potential (HCN-p) in sorghum and sudangrass [both Sorghum bicolor (L.) Moench] seedlings, but no systematic study of sources of variation in the procedure has been reported. Selfed seed was harvested from each of 12 ramets (two each from two sister plants from three low-HCN-p sudangrass parents), and seedlings for sampling were grown ina growth chamber, in two rows from each ramet, Seven-day-old seedlings were harvested and divided into two samples per row for extraction; two aliquots per extract were assayed spectrophotometrically for HCN-p. The experiment was replicated three times. The three parents …
Lizard's Tail Saururus Cernuus L., Gene Silberhorn
Lizard's Tail Saururus Cernuus L., Gene Silberhorn
Reports
The Wetland Flora Technical Report series provides concise information regarding the identification, growth habits, distribution, habitat, ecology and wetland indicator status for the title species. Illustrations are also included to aid in specimen identification.
Sucker Control Performance In Dark Tobacco, Bill Maksymowicz
Sucker Control Performance In Dark Tobacco, Bill Maksymowicz
Agronomy Notes
Poor sucker control adversely affects tobacco yield and quality. Suckers serve as a "sink" for nutrients and dry matter that otherwise would go to the expanding leaves intended for harvest, resulting in lower yields. Hand removal of large suckers can cause leaf damage, and failure to remove suckers may result in spoilage during the curing process, resulting in lowered quality. Use of chemical sucker control measures used in burley production can produce lower yields or W1desirable cured leaf color of dark tobacco. These studies were conducted to compare the effects of recommended sucker control practices for dark tobacco with systems …
Verbena Urticifolia L., John E. Ebinger
Portulaca Halimoides L., John E. Ebinger
Lantana Involucrata L., John E. Ebinger