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Full-Text Articles in Life Sciences
Some Studies On Introducing Castilleja Coccinea, Indian Paintbrush, Into Prairie Vegetation, Robert D. Wright
Some Studies On Introducing Castilleja Coccinea, Indian Paintbrush, Into Prairie Vegetation, Robert D. Wright
Journal of the Arkansas Academy of Science
Indian paintbrush, absent from many prairie remnants in Arkansas, behaves as a biennial in certain central Arkansas prairies, growing as a small rosette one season and flowering the next. It is known to be an indiscriminate root parasite. Field sowings were made in October, March and June. Annual change in population size was monitored for one of these sowings. Laboratory studies of germination were conducted to investigate the effects of light, temperature, water potential, and host species. Haustorial connections to host roots were examined. Based on these studies, a strategy for establishing the species in prairie was developed.
Fly Ash As A Fertilizer And Lime Source In Arkansas, Stanley L. Chapman
Fly Ash As A Fertilizer And Lime Source In Arkansas, Stanley L. Chapman
Journal of the Arkansas Academy of Science
Percent calcium carbonate equivalent (neutralizing value) of five fly ash samples ranged from 34 to 41. Field soils at three sites were treated with fly ash at rates that ranged from 1 to 6 tons per acre. Fly ash applications had opposite effects on extractable P, B, Fe, and Cu at Sites 1 and 2. A three-fold increase in total B occurred in wheat plants taken from one field treated with fly ash. At Site 3 test results of soil samples collected three, six, nine and twelve months after treatment showed that 2 tons of agricultural limestone was equivalent to …
Gas Chromortographic Analyses Of Biocrude-Producing Trees, Roy Z. Gehring, Bob D. Johnson
Gas Chromortographic Analyses Of Biocrude-Producing Trees, Roy Z. Gehring, Bob D. Johnson
Journal of the Arkansas Academy of Science
Gas chromotographic procedures were used to compare commercial diesel fuel with cyclohexane, ether, and methanol extracts from various tree species. Standard n-paraffin hydrocarbons ranging from C-10 thru C-34 were used as standards. These analyses indicated that several extracts, notably those from Juniper virginiana (juniper) and Pinus echinata (pine) trees of Northeast Arkansas and the Brazilian tree Copaifera langsdorffii (copaiba), contain numerous hydrocarbon and selected chemical products which serve as potential renewable biocrude sources.