Life Sciences Commons^™

The Morphology And Cytology Of Preussia Vulgare (Corda) Cain, Marcial Antonio Pastor-Corrales

Masters Theses

No abstract provided.

Residual Effects Of N-K Fertilization Of Coastal Bermudagrass On Spring Populations Of Weed Species, R. A. Allured, E. C. Gordon, R. E. Frans, Lyell F. Thompson

Journal of the Arkansas Academy of Science

A "Coastal bermudagrass" (Cynodon dactylon L.) sod was treated during a five-year period with rates of N and K fertilizers ranging from none to high levels of both elements. In the spring of the sixth year differences in weed species and population densities among the treated plots were observed. Spring weed counts showed that high rates of N fertilizer reduced the number of weed species and the total broadleaf weed population density by 37 and 81%, respectively. The higher rates of K fertilizer also reduced the population density of common dandelion (Taraxacum officinale Weber) and yellow toadflax (Linaria vulgaris Hill),the …

Vascular Plant Family Lauraceae In Arkansas, Gary E. Tucker

Journal of the Arkansas Academy of Science

The family Lauraceae is represented in Arkansas by a total of four species, members of the genera Lindera. Persea and Sassafras. Keys and distribution maps are provided. Lindera melissaefolium is reported from Arkansas for the first time.

Seed Germination In Ginkgo Biloba L. I. Influences Of Cold Treatment, Gibberellic Acid And Red Light, Michael I. Johnson, James L. Wickliff

Journal of the Arkansas Academy of Science

The influences of cold treatment, gibberellic acid and red light treatment on rate of germination of seeds of Ginkgo biloba L. were followed for a 12-wk period. Dispersal units were collected, and the outer fleshy layer was removed soon after harvest. Of water-imbibed, non-cold-treated seeds, 50% of those which germinated did so within 11 wk after planting. A single application of red light accelerated the 50% germination time by 3 wk. Imbibition in GA3 solution did not appear to accelerate germination. With 4-wk cold treatment the 50% germination time was accelerated 6 wk in water-imbibed seeds. Both red light and …

Mississippi Flora. I. Monocotyledon Families With Aquatic Or Wetland Species, Samuel B. Jones Jr.

Gulf and Caribbean Research

Keys, distribution maps, habitats, references, nomenclature, and notes are given for some 16 families of monocotyledons occurring naturally or naturalized in Mississippi. These families all contain one or more species which are found in aquatic or wetland habitats. They are: Alismataceae, Araceae, Cannaceae, Haemodoraceae, Hydrocharitaceae, Juncaginaceae, Lemnaceae, Marantaceae, Mayacaceae, Najadaceae, Pontederiaceae, Potamogetonaceae, Rug piaceae, Sparganiaceae, Typhaceae, Zannichelliaceae.

Edaphic Adaptations In Talinum Teretifolium (Portulacaceae), Gary Eugene Pinion

Dissertations, Theses, and Masters Projects

No abstract provided.

Annual ('Wimmera') Ryegrass Toxicity, Geoffrey A. Pearce, O. M. Goss, P. H. Berry, J. L. Wise

Journal of the Department of Agriculture, Western Australia, Series 4

Because annual ryegrass is one of the most widespread pasture plants in Western Australia, annual ryegrass toxicity is a threat to livestock in many agricultural areas—even though the area now affected is small.

The problem is being intensively studied by the Department of Agriculture and a working group has been set up to investigate potential control measures.

In this article the group reviews the problem and reports progress in its investigations to the end of 1973.

Forty Years Of Weeds And Seeds, G R W Meadly

Journal of the Department of Agriculture, Western Australia, Series 4

The Chief of the Department of Agriculture's Biological Services Division, Mr G. R. W. Meadly, retired on November 12, after more than 40 years with the Department.

Mr Meadly who has an international reputation for his work in weed control and seed certification, was Officer-in-Charge of the Department's Seed Certification and Weed Control Branch from 1950 to early 1972, when he was appointed Chief of the Biological Services Division.

Pasture Species Investigations - High Rainfall Area 1974, D. A. Nicholas

Experimental Summaries - Plant Research

1. Clover cultivar grazing trial North Bannister - 68NA1. 2. Clover cultivar grazing trial Chowerup - 70BR15. 3. Clover cultivars x redlegged mite - Chowerup - 70BR16. 4. Pasture types x stocking rate: - Denmark - 72D1. 5. Stocking rate and conservation for steer beef production - Mt. Barker Research Station - 71MT46. 6. Perennial versus annual grass grazing trial - Manjimup Research Station - 72MN5 - 72MN6

Soybean Seed Quality Survey, Dennis M. Tekrony

Agronomy Notes

During the past four years soybean acreage has nearly tripled in Kentucky to 1.1 million acres in 1973. Even though the total acreage has increased substantially, the average yield per acre has declined slightly during the same period to 28 bushels per acre in 1973. Why this low statewide average yield when we know that some Kentucky farmers consistently produce yields of over 40 bushels per acre? Many factors can contribute to this problem including; improper use of herbicides and pesticides, inadequate soil fertility, non-adapted varieties, low quality planting seed, and timely management of all production practices. The objective of …

Ua35/11 Student Honors Research Bulletin, Vol. Ii, Wku Honors Program

WKU Archives Records

Articles written by honors program students. They were originally research projects, class papers or essays written for academic credit, but in each case the student has done further work editing and improving his or her manuscript for this publication. The articles represent a broad range of interests and disciplines, and they indicate a healthy attempt on the part of at least some students to dig for deeper knowledge and understanding than is usually associated with undergraduate study.

• Greene, Bruce. The Traditional Fiddle Music of South-Central Kentucky
• Moody, Marlin. Some Effects of the Herbicide Glyphosate on Johnson Grass Rhizomes
• Jones, Larry. …

Measurement Of Soil Water Potential By Adsorption Conductivity, V. Philip Rasmussen Jr.

Undergraduate Honors Capstone Projects

Current methods of measuring soil water potential are reviewed, and the limitations of each are noted. The need for a transducer that will measure soil water potential over a wide moisture range for long periods of time is delineated. The concept of utilizing an adsorptive surface that resembles the soil in its water holding capacity as a transducer is discussed. Various designs and materials are tested for such a transducer.

All designs tested did not fulfill the requirements needed for a truly useful transducer. However, experimental results show that modification of the adsorptive surface should allow construction of a unit …

Skeleton Weed : The 1974 Narembeen Campaign, C R. Chambers

Journal of the Department of Agriculture, Western Australia, Series 4

Skeleton weed took an alarming, historic turn in Western Australia at the 1974 New Year.

After a decade of an almost complacent pattern—control of one or two small outbreaks annually by the Agriculture Protection Board— general alarm erupted with the discovery of big areas at Pithara and mainly Narembeen.

What followed was a massive movement and engagement of not only Department staff but also the farming community in an attempt to beat this outbreak.

Clover Scorch: Summary Of 1974 Experiments, D. L. Chatel

Experimental Summaries - Plant Research

Experiments reported in this summary were conducted jointly with CM Francis. 1. Variety Screening - During 1974, two hundred and fifty-four varieties were screened for resistance to Kabatiella caulivora in small plots at Denmark. The test varieties included 49 that showed up as promising in previous years. The remainder included all the untested accessions for which sufficient seed was available. There were 239 sub. sp. Subterranean, 14 sub, sp. Yanninicum and 1 Brachycalycinum... - The plots were periodically inoculated with infected debris and rated for disease severity on a number of occasions. Lists of the most and least resistant clovers …

1974 Potash Trials 2. Yield Data, W. J. Cox

Experimental Summaries - Plant Research

Experiment nos: 74AL1, 74AL2, 74AR1, 74AR2,74BU1, 74BU2, 74BU3, 74BU4, 74BY1, 74 BY2, 74BY3, 74DE1, 74DE2, 74DE3, 74DE4, 74DE5, 74DE6, 74HA1, 74HA2, 74HA3, 74MA1, 74MA2, 74MA3, 74MO1, 74MO2, 74MO3, 74NA1, 74NA2.

1974 The Ecology And Control Of Doublegee (Emex Australis) And Emex Spinosa, D J. Gilbey

Experimental Summaries - Plant Research

The objectives of the field experimental programme for 1974 were to - 1) Evaluate a technique to measure pasture loss as a result of doublegee infestation at Merredin, Wongan.Hills and Chapman. 2) Evaluate the effect of cultural and herbicide treatment combinations on the magnitude and distribution of viable doublegee seeds in the soil at Avondale, Merredin, Wongan Hills and Chapman. 3) Measure the magnitude and distribution of viable doublegee seeds in the soil from paddocks representing each year of a two crop, plus three year pastureley rotation at Avondale, Merredin, Wongan Hills and Chapman. 4) Screen herbicides for selective control …

Nitrogenous Fertilisers For Cereals: Results From 1974 Trials With Wheat, Barley And Oats, M G. Mason

Experimental Summaries - Plant Research

74A1, 74A3, 74AL5, 74AL4, 74C3, 74E2, 74ES31, 73GLI, 74JE1, 74JE2, 74LG1, 74LG2, 74LG3, 74LG6, 61M11, 74MT17, 74NO1, 74NO2, 74WH2.

Location-Allocation Models For Establishing Facilities, David F. Gibson, John Rodenberg

Aspen Bibliography

Two models and accompanying computer programs are presented which were developed to locate facilities for the timber harvesting industry. Addressed is a case of the facility location-allocation problem. The optimum location and number of landings, facilities to which timber is transshipped, are determined so as to minimize a cost function. This function is composed of the following components: (1) cost of transporting material from its original location to a landing, (2) cost of establishing a landing (facility cost), and (3) cost of transporting material from the landings to some designated point termed the origin. Output of the computer programs is …

Vascular Vegetation Of Moultrie County, Illinois, Larry M. Dennis

Masters Theses

No abstract provided.

Megasporogenesis And Early Embryogeny Of Sanguinaria Canadensis L. (Bloodroot), Stephen R. Foor

Masters Theses

No abstract provided.

The Corticolous Mosses Of East-Central Illinois, Daniel J. Royse

Masters Theses

No abstract provided.

Some Ethnically Important Herbaceous Plants Of East-Central Illinois, John E. Jester

Masters Theses

No abstract provided.