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Full-Text Articles in Life Sciences
Distance Of Interference Of Red Rice (Orya Sativa) In Rice (O. Sativa), Sam L. Kwon, Roy J. Smith Jr., Ronald E. Talbert
Distance Of Interference Of Red Rice (Orya Sativa) In Rice (O. Sativa), Sam L. Kwon, Roy J. Smith Jr., Ronald E. Talbert
Journal of the Arkansas Academy of Science
Three rice cultivars were grown to determine the distance at which red rice affects growth and grain yield. Red rice reduced grain yield of Lemont when rice plants grew within 71 and 53 cm of red rice in 1986 and 1988, respectively. Grain yield of Newbonnet was reduced when grown within 53 cm of red rice in both years. Grain yield of Tebonnet was reduced when grown within 53 and 36 cm of red rice in 1986 and 1988, respectively. Grain yield reduction in influenced areas averaged 35, 26 and 21% for Lemont, Newbonnet, and Tebonnet, respectively. As the distance …
First Record Of Leptodora Kindti In Dardanelle Reservoir And Status Of Other Recent Additions To Dardanelle Fauna, John D. Rickett, Robert L. Watson
First Record Of Leptodora Kindti In Dardanelle Reservoir And Status Of Other Recent Additions To Dardanelle Fauna, John D. Rickett, Robert L. Watson
Journal of the Arkansas Academy of Science
No abstract provided.
Classification System For The Natural Vegetation Of Arkansas, Thomas L. Foti, Martin Blaney, Xiaojun Li, Kimberly G. Smith
Classification System For The Natural Vegetation Of Arkansas, Thomas L. Foti, Martin Blaney, Xiaojun Li, Kimberly G. Smith
Journal of the Arkansas Academy of Science
We present a hierarchical classification system for existing natural vegetation of Arkansas based on the United Nations Educational, Scientific and Cultural Organization (UNESCO) system. It incorporates aspects of systems in use by the Nature Conservancy, Arkansas Natural Heritage Commission, Arkansas Game and Fish Commission, Society of American Foresters, and United States Forest Service, as well as data on potential vegetation from maps by E.E. Dale and A.W. Kuchler. A total of 18 physiognomic cover types are recognized for natural terrestrial cover, 6 for palustrine cover, and 4 each for lacustrine cover and riverine cover. Over 200 community types are recognized, …
Vegetation Of Maple-Leaved Oak Sites On Sugarloaf And Magazine Mountains, Arkansas, David W. Rouw, George P. Johnson
Vegetation Of Maple-Leaved Oak Sites On Sugarloaf And Magazine Mountains, Arkansas, David W. Rouw, George P. Johnson
Journal of the Arkansas Academy of Science
We conducted an analysis of the vegetation of the maple-leaved oak sites on Sugarloaf and Magazine Mountains, Arkansas, during September and October of 1993. The woody vegetation was sampled using the point-quarter method; on Sugarloaf Mountain five transects were sampled (950 m) and on Magazine Mountain four transects were sampled (710 m). Soil samples from each site were collected and analyzed for 15 factors. In total 27 species were recorded and measured for both sites, 18 for Sugarloaf and 19 for Magazine. The Sugarloaf site can be described as a Quercus-Juniperus community and the Magazine site can be described as …
Bryophyte And Pteridophyte Distribution Records Of Southern Arkansas, James R. Bray, Greg A. Whitehead, Daniel L. Marsh, Dennis W. Mcmasters
Bryophyte And Pteridophyte Distribution Records Of Southern Arkansas, James R. Bray, Greg A. Whitehead, Daniel L. Marsh, Dennis W. Mcmasters
Journal of the Arkansas Academy of Science
No abstract provided.
Sex Ratio And Success, An Assessment Of Lindera Melissifolia In Arkansas, Robert D. Wright
Sex Ratio And Success, An Assessment Of Lindera Melissifolia In Arkansas, Robert D. Wright
Journal of the Arkansas Academy of Science
Lindera melissifolia pondberry, is a federally endangered dioecious shrub found in Arkansas and four other southeastern states. Although by far the greatest area exists in Arkansas, it is broken into numerous small single-sex clones concentrated in two locations. Several stands have been lost during the 1980's according to records of the Arkansas Natural Heritage Commission. Even casual observation reveals that there are more males than females. This suggests dependence on vegetative reproduction, with possible bias against females. This paper reports on work investigating this suggestion. It was found that a 7:1 bias in area covered favors males. Poor survival of …