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Association Of Mesocotyl And Coleptile Elongation With Seeding Vigor In Rice, M. A. Mgonja, R. H. Dilday, S. L. Skinner, F. C. Collins
Association Of Mesocotyl And Coleptile Elongation With Seeding Vigor In Rice, M. A. Mgonja, R. H. Dilday, S. L. Skinner, F. C. Collins
Journal of the Arkansas Academy of Science
Three experiments were conducted to evaluate the relationship of mesocotyl and coleoptile elongation to seedling vigor and plant height in rice (Oryza sativa). A laboratory experiment was conducted to evaluate the potential lengths of the mesocotyl and coleoptile of semidwarf and standard rice genotypes. Four genotypes exhibited inherent differences in their ability for mesocotyl and coleoptile elongation. The semidwarf genotypes ('M-101 ' and RU 7703008) showed reduced mesocotyls, coleoptiles, and total lengths (mesocotyl + coleoptile); whereas, the tall plant type ('L-201' and 'Labelle') had comparatively longer mesocotyls, coleoptiles, and total lengths. Itis assumed that mesocotyl elongation is the most important …
Effect Of Nitrogen Fertilizer On Milling Quality Of Rice (Oryza Sativa), R. H. Dilday
Effect Of Nitrogen Fertilizer On Milling Quality Of Rice (Oryza Sativa), R. H. Dilday
Journal of the Arkansas Academy of Science
The effect of nitrogen fertilizer on milling quality or milling yield of rice (Oryza sativa) was tested for two cultivars, 'Lemont' and 'Newbonnet'. This was an increase in the percentage of broken kernels and a decrease in head rice yield when no nitrogen fertilizer was applied as compared to applying all of the nitrogen at preflood or in split applications. The greater affect was on Lemont, a cultivar that requires a high amount of nitrogen fertilizer for maximum grain yields. Data showed that the percentage of head rice can be reduced by as much as 7 to 22 percent in …
Distribution, Abundance, Status, And Phytogeography Of Log Ferns (Dryopteris: Woodsiaceae) In Arkansas, James H. Peck, Carol J. Peck
Distribution, Abundance, Status, And Phytogeography Of Log Ferns (Dryopteris: Woodsiaceae) In Arkansas, James H. Peck, Carol J. Peck
Journal of the Arkansas Academy of Science
A study of the distribution, abundance, status, and phytogeography of the six taxa of Log Ferns {Dryopteris: Woodsiaceae) that are known to occur in Arkansas was conducted from 1981 -1986. Five of these ferns are generally quite rare in Arkansas. Except for D. marginalis, all exist in Arkansas as small, peripheral populations that are marginal, outlier populations to the west and south or west and north of their metropolis. Two sterile, triploid hybrid taxa (D. X australls and D. X leedsii each occur at only one locality, and there with but one of their parent taxa. The population of the …
Control Of Herbaceous Competitors In Progeny Tests Using Container-Grown Seedlings, Jimmie L. Yeiser, J. W. Boyd, D. J. Reed
Control Of Herbaceous Competitors In Progeny Tests Using Container-Grown Seedlings, Jimmie L. Yeiser, J. W. Boyd, D. J. Reed
Journal of the Arkansas Academy of Science
Container-grown and May-planted seedlings of loblolly and shortleaf pines were treated with herbicides for control of herbaceous competitors. Weed control and seedling growth were evaluated. Competitor control was good for all treatments. Survival and growth of pines differed by species and herbicide treatment. The best treatment for both species included covering seedlings and spraying competitors with glyphosate. Both species showed decreased survival and growth when treated with medium and high rates of hexazinone + sulfometuron methyl.
Survival And Growth Two Years After Control Of Herbaceous Competitors In Newly Planted Seedlings Of Loblolly Pine, Jimmie L. Yeiser, J. W. Boyd
Survival And Growth Two Years After Control Of Herbaceous Competitors In Newly Planted Seedlings Of Loblolly Pine, Jimmie L. Yeiser, J. W. Boyd
Journal of the Arkansas Academy of Science
Early or late over-the-top applications of herbicides were used to control herbaceous competition in machine planted loblolly pine (Pinus taeda L) seedlings at two locations in a pasture near Alleene and hand planted seedlings on a bedded site near Fouke. Sites were selected for diverse competitors. None of the treatments controlled weeds for the entire growing season. Only glyphosate + sulfometuron methyl produced seedling survival and growth below the check plots. The best over-the-top treatments were sulfometuron methyl alone or sulfometuron methyl + hexazinone.
Additions To The Known Endemic Flora And Fauna Of Arkansas, Robert T. Allen
Additions To The Known Endemic Flora And Fauna Of Arkansas, Robert T. Allen
Journal of the Arkansas Academy of Science
Robison and Smith's (1982) list of endemic species of Arkansas rendered a valuable service to the community of biologists interested in the endemic biota of the state. These authors listed seven species of plants and forty species of animals endemic to Arkansas. This paper stimulated my interest in the endemic biota of the Ozark/Ouachita Mountain region of Missouri, Arkansas, and Oklahoma. During the course of compiling a list of Ozark/Ouachita endemic species several references were found that listed Arkansas endemic taxa inadvertently overlooked by Robison and Smith. Most notable among these references was Chamberlin and Hoffman (1958), Checklist of the …
Bibliographic Summary Of Arkansas Field Botany, James H. Peck, Carol J. Peck
Bibliographic Summary Of Arkansas Field Botany, James H. Peck, Carol J. Peck
Journal of the Arkansas Academy of Science
Over 750 references, compiled over the past five years, are presented on floristics, taxonomy, autecology, synecology, species biology, habitat analysis, impact analysis, paleoenvironment, phytogeography, and history of field botany in Arkansas. This bibliography is reported to facilitate efforts to document and interpret the flora, the vegetation, and the natural heritage of Arkansas and to encourage others to participate in that collective effort.
Seedling Response In A Greenhouse To Four Rates Of Old And New Paper Mill Sludge, Jimmie L. Yeiser
Seedling Response In A Greenhouse To Four Rates Of Old And New Paper Mill Sludge, Jimmie L. Yeiser
Journal of the Arkansas Academy of Science
Four rates (0, 36, 75, and 11 2 DT/A)of both old and new pulp-mill sludges were tested in a greenhouse for impact on survival and growth of seedlings of loblolly pine (Pinus taeda L). After one growing season no meaningful differences were detected for seedling survival and growth, number off lushes, and decomposition rate for old and new sludges regardless of rate. Seedling foliage showed increases in Mg and Ca and sludges exhibited high pH and increased salinity.
Notes On The Biology Of Thyanta Claceala (Hemiptera: Pentatomidae) On Tephrosia Virginiana (Leguminosae), A New Host Plant, Phoebe A. Harp, Harvey E. Barton
Notes On The Biology Of Thyanta Claceala (Hemiptera: Pentatomidae) On Tephrosia Virginiana (Leguminosae), A New Host Plant, Phoebe A. Harp, Harvey E. Barton
Journal of the Arkansas Academy of Science
No abstract provided.