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Articles 1 - 8 of 8
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A Memorable Meeting, February 1994, Fathi Habashi
A Memorable Meeting, February 1994, Fathi Habashi
Fathi Habashi
Decision taken at the Steering Committee Meeting of the International Mineral Processing Congress in San Francisco February 1994 to name the IMPC Award.
The Soil Seed Pool Of Huffman Prairie, A Degraded Ohio Prairie, And Its Potential In Restoration, Scott J. Meiners, David L. Gorchov
The Soil Seed Pool Of Huffman Prairie, A Degraded Ohio Prairie, And Its Potential In Restoration, Scott J. Meiners, David L. Gorchov
Scott J. Meiners
The germinable seeds in the soil of a relict Ohio prairie were investigated to determine the composition and density of dicots of potential value in restoration. Soil samples were collected from three areas of the prairie with distinctive species compositions: swale, north upland, and south upland. Seed density and species composition were based on seedling emergence over 90 days. North upland and south upland samples yielded similar total seedling densities (5,902 and 5,109 m·2 ) while that of the swale was greater ( 15,262 m·2 ). Thirteen introduced and 18 native dicot species were present; seven of the latter were …
Flora Of An Unusually Diverse Old Growth Forest In The Southeastern Adirondacks, Gordon C. Tucker, Richard S. Mitchell
Flora Of An Unusually Diverse Old Growth Forest In The Southeastern Adirondacks, Gordon C. Tucker, Richard S. Mitchell
Gordon C. Tucker
A lowland, virgin white pine-hemlock stand and associated old-growth habitats were studied at Pack Forest Preserve, Warren County, NY. An area of 48.1 acres, interrupted only by nature trails, has white pines up to 58 inches in diameter, and supports 355 native plant species-an unexpectedly high number, considering its location in the climatically severe Adirondack Mountains. This minimally disturbed old-growth forest and its associated wetlands are not only diverse, but essentially weed-free, making them ideal for future ecological research, botanical teaching and monitoring activities.
Using Hydrophilic Polymers To Control Nutrient Release, Robert Mikkelsen
Using Hydrophilic Polymers To Control Nutrient Release, Robert Mikkelsen
Robert Mikkelsen
Using diverse technological approaches, many types of delivery devices have been used to supply plant nutrients at a controlled rate in the soil. One new approach is the use of hydrophilic polymers as carriers of plant nutrients. These polymers may be generally classified as 1) natural polymers derived from polysaccharides, 2) semi-synthetic polymers (primarily cellulose derivatives), and 3) synthetic polymers. By controlling the reaction conditions when forming the polymers, various degrees of cross-linking, anionic charge, and cationic charge can be added, thereby changing their effectiveness as fertilizer carriers. When fertilizer-containing solutions are mixed with hydrophilic polymers to form a "gel" …
Influence Of Summer Storms On The Solution Geochemistry In A Coastal Plain Hydrosequence, Jeffrey M. Novak, C. Lee Burras
Influence Of Summer Storms On The Solution Geochemistry In A Coastal Plain Hydrosequence, Jeffrey M. Novak, C. Lee Burras
C. Lee Burras
An understanding of factors which influence wetland soil solution chemistry is important for soil solutions are known to influence some chemical properties of surface waters. The influence of summer storms on the solution geochemistry in a South Carolina riverine wetland soil was evaluated by comparing pore water collected 2,4 hr after five summer storm events with pore water acquired during five nonstorm periods. Pore water was collected by tension lysimeters buried at 15 to 152 cm in two locations along a hydrologic gradient. Samples of rain, throughfall and stream water were also collected. Overall, summer storms had no significant influence …
Induced Lsoflavonoids In Diverse Populations Of Astragalus Cicer, Andrew W. Lenssen, Susan S. Martin, Charley E. Townsend
Induced Lsoflavonoids In Diverse Populations Of Astragalus Cicer, Andrew W. Lenssen, Susan S. Martin, Charley E. Townsend
Andrew W. Lenssen
lsoflavonoids were induced in mature leaves of the legume Asbagalus cicer L. by spores of the fungus Bipoaris zeicola. The five major elicited compounds included two isoflavans (mucronulatol and astraciceran), two isoflavones (cajanin and acicerone), and a pterocarpan (maackiain). Only occasional traces of these compounds were detected in controls. Among 41 populations originating in Europe or Russia, mean total elicited isoflavonoid content differed 12-fold. Mucronulatol was the predominant compound elicited, comprising 20-70% of total isoflavonoids. Significant interpopulational differences existed for each isoflavonoid, but no geographic patterns of total or relative proportions of the five compounds were discernible.
Acicerone: An Isoflavone From Astragalus Cicer, Andrew W. Lenssen, Susan S. Martin, Charley E. Townsend, Bruce Hawkins
Acicerone: An Isoflavone From Astragalus Cicer, Andrew W. Lenssen, Susan S. Martin, Charley E. Townsend, Bruce Hawkins
Andrew W. Lenssen
A new isoflavone isolated from fungus-inoculated roots of Astragalus cicer has been identified as 6-hydroxy- 7-methoxy-3’,4’-methylenedioxyisoflavone (acicerone).
Biology And Control Of Common Milkweed, Prasanta C. Bhowmik
Biology And Control Of Common Milkweed, Prasanta C. Bhowmik
Prasanta C. Bhowmik
No abstract provided.