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Full-Text Articles in Life Sciences
Zinc Nutrition Of Rice Plants As Influenced By Seed Germinated In Zinc Solutions, Narsimaha R. Kasireddy, Lyell F. Thompson
Zinc Nutrition Of Rice Plants As Influenced By Seed Germinated In Zinc Solutions, Narsimaha R. Kasireddy, Lyell F. Thompson
Journal of the Arkansas Academy of Science
In recent years a physiological disorder of rice (Oryza sativa L.) seedlings growing in soils high in exchangeable calcium has been diagnosed as zinc deficiency. Calculations show that less than 30 g of zinc is needed to satisfy the nutrition of a hectare of 6-8-wk-old rice plants. Rice seed was soaked and germinated in dilute solutions of zinc ethylenediamine tetraacetate, zinc sulfate and zinc lignosulfonate prior to planting in greenhouse pots containing a zinc-deficient soil. The rice plants grown from the zinc-treated seed produced more growth and sorbed more zinc than rice plants grown from untreated seed.
Multi-Use Of The Campus Environment In The Teaching Of Botany, Jewel E. Moore
Multi-Use Of The Campus Environment In The Teaching Of Botany, Jewel E. Moore
Journal of the Arkansas Academy of Science
Use of the campus environment in the teaching program is described with special reference to the campus of University of Central Arkansas. Permanent labels identify the campus trees, many of which are representative of native Arkansas trees. A Daylily Display Bed and an Iris Display Bed, both composed of hybrid varieties, are included in the campus design. This organization of the flora of the campus provides a community service as well as an outdoor supplement to the classroom studies in plant science.
Variation In Ligule Spotting In Coreopsis Basalis, Edwin B. Smith
Variation In Ligule Spotting In Coreopsis Basalis, Edwin B. Smith
Journal of the Arkansas Academy of Science
The ligules of Coreopsis basalis bear an attractive reddish-brown spot at the base. The spot has been used as a taxonomic character of the species. But there is variation within populations at any one time, and within individuals at sequential times, for the size of the spot. A few individuals lack the ligule spot entirely. Variation in average ligule spot size in greenhouse-grown populations of C. basalis and an artificial hybrid is described. Average spot size declines as the blooming season progresses. Some individuals with spotted ligules early in the season bore spotless ligules late in the season. No correlation …
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
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
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
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 …