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Plant Sciences

1974

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Articles 31 - 60 of 262

Full-Text Articles in Life Sciences

1974 Preliminary Report Of Kentucky Small Grain Variety Trials At Bowling Green And Lexington, Charles Tutt, Morris J. Bitzer, Verne C. Finkner Sep 1974

1974 Preliminary Report Of Kentucky Small Grain Variety Trials At Bowling Green And Lexington, Charles Tutt, Morris J. Bitzer, Verne C. Finkner

Agronomy Notes

Each year the small grain variety trials are conducted at Princeton, Murray, Bowling Green and Lexington. In 1974, the plots at Princeton and Murray were severely infected with a complex of diseases including Barley Yellow Dwarf, Septoria glume blotch, wheat scab and an unidentified disease in the wheat. As a result of the intensity of these diseases, the data obtained from these plots was very erratic and the results were not considered to be experimentally valid. The data obtained at Bowling Green and Lexington were quite valid and representative of the general situation in Kentucky.


Vitis Riparia Michx., John H. Gerard Aug 1974

Vitis Riparia Michx., John H. Gerard

Specimens by Name

No abstract provided.


Maclura Pomifera (Raf.) Schneid., Mcclain Aug 1974

Maclura Pomifera (Raf.) Schneid., Mcclain

Specimens by Name

No abstract provided.


Lysimachia Lanceolata Walter, John E. Ebinger Aug 1974

Lysimachia Lanceolata Walter, John E. Ebinger

Specimens by Name

No abstract provided.


Acer Saccharum Marshall, Bob Holeman Aug 1974

Acer Saccharum Marshall, Bob Holeman

Specimens by Name

No abstract provided.


Fraxinus Pennsylvanica Marsh., Bob Holeman Aug 1974

Fraxinus Pennsylvanica Marsh., Bob Holeman

Specimens by Name

No abstract provided.


Samolus Valerandi L., John E. Ebinger Aug 1974

Samolus Valerandi L., John E. Ebinger

Specimens by Name

No abstract provided.


Lysimachia Ciliata L., John E. Ebinger Aug 1974

Lysimachia Ciliata L., John E. Ebinger

Specimens by Name

No abstract provided.


Phyla Lanceolata (Michx.) Greene, W. Mcclain Aug 1974

Phyla Lanceolata (Michx.) Greene, W. Mcclain

Specimens by Name

No abstract provided.


Acer Negundo L., W. Mcclain Aug 1974

Acer Negundo L., W. Mcclain

Specimens by Name

No abstract provided.


Samolus Valerandi L., Ted Bradley Aug 1974

Samolus Valerandi L., Ted Bradley

Specimens by Name

No abstract provided.


Lippia Lanceolata Michx., Bob Holeman Aug 1974

Lippia Lanceolata Michx., Bob Holeman

Specimens by Name

No abstract provided.


The Genus Hedysarum In North America, Terry Edwin Northstrom Aug 1974

The Genus Hedysarum In North America, Terry Edwin Northstrom

Theses and Dissertations

In North America, Hedysarum taxa extend from southern Arizona to Banks Island and from northern Alaska to Newfoundland. They exhibit a high degree of polymorphism which is usually expressed in the form of a gradient in morphological characteristics. Four species, one subspecies and four varieties are recognized, including one new combination, H. boreale ssp. boreale var. rivulare (Williams) Northstrom. Comparative anatomical and morphological studies revealed two basic patterns. Chromosome numbers of all taxa were determined. The basic chromosome number of H. alpinum, H. sulphurescens and H. occidentale is n=7. The basic chromosome number of H. boreale is n=8. Seed protein …


Morus Alba Var. Alba, Bob Holeman Aug 1974

Morus Alba Var. Alba, Bob Holeman

Specimens by Name

No abstract provided.


A Revision Of The Astragalus Lentiginosus Complex For The State Of Utah, Carol Susan Schoener Aug 1974

A Revision Of The Astragalus Lentiginosus Complex For The State Of Utah, Carol Susan Schoener

Theses and Dissertations

The taxonomy and distribution of the Astragalus lentiginosus complex in Utah is presented. The nine varieties are listed and a key is provided which allows determination of the members of the complex in Utah. Each entity is discussed and illustrated. Two distribtuion maps are included for each variety, one showing the distribution in Utah and the other, the general range of the entity. The body of this work is based on the study of herbarium specimens and field observations and collection. These studies have resulted in the synonymizing of two varieties, the inclusion of another and one nomenclatural change.


Evidence Of Eutrophication In Wall Lake Barry County, Michigan, John J. Meany Aug 1974

Evidence Of Eutrophication In Wall Lake Barry County, Michigan, John J. Meany

Masters Theses

No abstract provided.


Some Aspects Of Vegetation Response To A Moisture Gradient On An Ephemeral Stream In Central Arizona, Deborah Ann Bloss Aug 1974

Some Aspects Of Vegetation Response To A Moisture Gradient On An Ephemeral Stream In Central Arizona, Deborah Ann Bloss

Theses and Dissertations

Ecological aspects of desert vegetation in relation to a moisture gradient of an ephemeral stream in central Arizona were investigated. The stream channel, flood plain and north, west, south, east facing slopes represent a moisture gradient going from most mesic to most xeric conditions. In parts of the system, vegetation from the stream channel intergraded into flood plain vegetation which in turn intergraded into slope vegetation types. In other areas there are sharp delineations between stream channel and flood plain, and between flood plain and slope. Trees and legumes preferred medium moisture habitats, while forbs, shrubs and succulents preferred the …


Metabolism Of 3-Isopropyl-4h-2,1,3-Benzothiadiazin-4-(3h)-One-2,2-Dioxide (Bentazon) In Agitated And Non-Agitated Sediment, David Cortez Gutierrez Aug 1974

Metabolism Of 3-Isopropyl-4h-2,1,3-Benzothiadiazin-4-(3h)-One-2,2-Dioxide (Bentazon) In Agitated And Non-Agitated Sediment, David Cortez Gutierrez

Theses and Dissertations

Bentazon, (3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-l-2,2-dioxide) a new experimental herbicide, was studied under the effects of sterile and non-sterile conditions, 12 hours light: 12 hours dark and totally dark conditions, and agitated and non-agitated conditions in aquatic sediment. The effects of the different levels of BOD/COD values on the decomposition of Bentazon were studied. Photoperiod, sterility, and BOD/COD levels appeared to have no influence in the breakdown of Bentazon. Agitation-time interaction appeared to be the only factor that influenced the more rapid degradation of Bentazon. Bentazon was the major 14C-residue found in the water; it was followed by an unknown. The third major metabolite …


A Taxonomic And Ecologic Study Of The Riverbottom Forest On St. Mary River, Lee Creek And Belly River In Southwest Alberta, Canada, Robert Keith Shaw Aug 1974

A Taxonomic And Ecologic Study Of The Riverbottom Forest On St. Mary River, Lee Creek And Belly River In Southwest Alberta, Canada, Robert Keith Shaw

Theses and Dissertations

The riverbottom forest community of St. Mary River, Lee Creek and Belly River in southwest Alberta, Canada is a unique ecological entity characterized by poplar species having their major Alberta distribution along these streams. Stands in the community are dominated by three tree species, six shrub species and nine herb species. Establishment of the community is dependent on climate and substrate; destruction is the result of progressive lateral stream-flow erosion. Soils are sandy loams above gravel, with pH values of 7.7 to 8.0 and soluble salt concentration of 176 to 458 parts per million. Trees in mature stands averaged 23.0 …


The Algae Of Huntington Canyon, Utah, Carol Jean Endsley Aug 1974

The Algae Of Huntington Canyon, Utah, Carol Jean Endsley

Theses and Dissertations

A taxonomic study of the algae of Huntington canyon, Emery County, Utah, was conducted from March 1971 to April 1972. The algal flora of this cold, fast-flowing, hard-water mountain creek consisted of ninety-five genera, one hundred ninety-six species, twenty-nine varieties, and two forms. This diverse flora was dominated by many different species with usually rather few individuals of Achnanthes, Cymbella, Diatoma, Gomphonema, Lyngbya, Navicula, Nitzschia, Oscillatoria, Synedra, and Ulothrix.


Radial Distribution Of Corticular Photosynthate In Stems Of Bigtooth And Trembling Aspen, Robert K. Shepherd, Jr. Aug 1974

Radial Distribution Of Corticular Photosynthate In Stems Of Bigtooth And Trembling Aspen, Robert K. Shepherd, Jr.

Aspen Bibliography

No abstract provided.


Coastal Vegetational Communities Of The Two Texas Barrier Islands, Boca Chica And Brazos, Baltazar Cisneros Aug 1974

Coastal Vegetational Communities Of The Two Texas Barrier Islands, Boca Chica And Brazos, Baltazar Cisneros

Theses and Dissertations - UTB/UTPA

Two Texas barrier islands, Boca Chica and Brazos, have unique coastal vegetational communities that may be Influenced by several environmental factors. These environmental factors include temperature, precipitation, wind speed, sunshine exposure, day length, and dune height. The purpose of this investigation was to determine the total number of coastal plant species per station, season, and year and to consider environmental factors that may significantly affect the number and pattern of coastal species. Coverage comparison between aerial and land sampling and aerial vegetational zonation was also considered.

Results indicated the presence of 21 angiosperm families and a total of 54 species. …


Vitis Riparia Michx., Bob Holeman Jul 1974

Vitis Riparia Michx., Bob Holeman

Specimens by Name

No abstract provided.


Goodyera Pubescens (Willd.) R. Br., Loy R. Phillippe Jul 1974

Goodyera Pubescens (Willd.) R. Br., Loy R. Phillippe

Specimens by Name

No abstract provided.


Vitis Riparia Michx., W. E. Mcclain Jul 1974

Vitis Riparia Michx., W. E. Mcclain

Specimens by Name

No abstract provided.


Morus Alba Var. Alba, W. Mcclain Jul 1974

Morus Alba Var. Alba, W. Mcclain

Specimens by Name

No abstract provided.


Acer Negundo L., Bob Holeman Jul 1974

Acer Negundo L., Bob Holeman

Specimens by Name

No abstract provided.


Lysimachia Quadriflora Sims, John E. Ebinger Jul 1974

Lysimachia Quadriflora Sims, John E. Ebinger

Specimens by Name

No abstract provided.


Vitis Riparia Michx., John E. Ebinger Jul 1974

Vitis Riparia Michx., John E. Ebinger

Specimens by Name

No abstract provided.


Acer Negundo L., Randy W. Nyboer Jul 1974

Acer Negundo L., Randy W. Nyboer

Specimens by Name

No abstract provided.