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Articles 1 - 15 of 15
Full-Text Articles in Life Sciences
Stream Assessment On The Impact Of Agricultural Activity In The Dry River, Va, Heston Anderson, Nate Bickford
Stream Assessment On The Impact Of Agricultural Activity In The Dry River, Va, Heston Anderson, Nate Bickford
Virginia Journal of Science
Stream Bioassessments using macroinvertebrate population dynamics is a technique that determines water quality in natural aquatic environments based on the taxa found at the site. The aim of this study is to determine if agricultural activity in Rockingham County, VA has an impact on water quality in Dry River. Stream quality was evaluated by sampling and identifying macroinvertebrate taxa at various sites above and below disturbances. Each individual was ranked from 1-10 based on pollution tolerance or intolerance using the Biological Monitoring Working Party Index. The results in this study indicate that agricultural activity does impact water quality in Dry …
Section Abstracts: Agriculture, Forestry And Aquaculture
Section Abstracts: Agriculture, Forestry And Aquaculture
Virginia Journal of Science
Abstracts of the Agriculture, Forestry and Aquaculture Section for the 94th Annual Virginia Academy of Science Meeting, May 18-20, 2016, at University of Mary Washington, Fredericksburg, VA.
Section Abstracts: Agriculture, Forestry And Aquaculture
Section Abstracts: Agriculture, Forestry And Aquaculture
Virginia Journal of Science
Abstracts of the Agriculture, Forestry and Aquaculture Section for the 93rd Annual Virginia Academy of Science Meeting, May 2015, at James Madison University
Pesticide Analysis In Vegetables Using Quechers Extraction And Colorimetric Detection, D. S. G. Neufeld, N. Åkerson, D. Barahona
Pesticide Analysis In Vegetables Using Quechers Extraction And Colorimetric Detection, D. S. G. Neufeld, N. Åkerson, D. Barahona
Virginia Journal of Science
A novel combination of extraction and detection methods is demonstrated for pesticide residue analysis in vegetable samples. Acetylcholinesterase (AChE) inhibition was used as a simple colorimetric test for organophosphates/carbamates (OP/C), and was tested with extracts from the widely-used QuEChERS extraction method. In the absence of pesticide, diluted (50% with water) acetonitrile did not inhibit enzyme activity, demonstrating the compatibility of this extraction solvent with the AChE inhibition test. QuEChERS extraction of chlorpyrifos-spiked tomato, spinach and lettuce samples indicated a high sensitivity to OP/C, with AChE inhibition occurring in the ppb range. The applicability of this method combination was tested by …
Section Abstracts: Agriculture, Forestry, And Aquaculture
Section Abstracts: Agriculture, Forestry, And Aquaculture
Virginia Journal of Science
Abstracts of the Agriculture, Forestry, and Aquaculture Section for the 92nd Annual Virginia Academy of Science Meeting, May 2014, at Virginia Commonwealth University in Richmond, Virginia
Section Abstracts: Agriculture, Forestry And Aquaculture
Section Abstracts: Agriculture, Forestry And Aquaculture
Virginia Journal of Science
Abstracts of the Agriculture, Forestry and Aquaculture Section for the 91st Annual Virginia Journal of Science Meeting, May 2013
Effect Of Greenhouse Temperature On Tomato Yield And Ripening, Mark E. Kraemer, Christopher D. Mullins, Carl E. Niedziela
Effect Of Greenhouse Temperature On Tomato Yield And Ripening, Mark E. Kraemer, Christopher D. Mullins, Carl E. Niedziela
Virginia Journal of Science
High fuel costs have encouraged producers of greenhouse tomato (Solanum lycopersicum L.) in the mid-Atlantic region to reduce air temperatures during the day. However, effects on fruit ripening and yield are not known, especially under the low light conditions found in off-season production. This 2-yr study compared fruit ripening and yield of tomato under two temperature regimes during the fall season. Two sets of 18 tomato plants, three rows of six, were grown in soilless culture under either a warm or cool temperature regime. Temperatures were similar during night hours but allowed to rise to at least 21- …
Section Abstracts: Agriculture, Forestry And Aquaculture Science
Section Abstracts: Agriculture, Forestry And Aquaculture Science
Virginia Journal of Science
Abstracts of the Agriculture, Forestry, and Aquaculture Sciences section for the Virginia Academy of Science 89th Annual Meeting, May 25-27, 2011, University of Richmond, Richmond, Virginia.
Garlic As An Alternative Anthelmintic In Sheep, A. Curry, B. D. Whitaker
Garlic As An Alternative Anthelmintic In Sheep, A. Curry, B. D. Whitaker
Virginia Journal of Science
An increase in the anthelmintic resistance of parasites in small ruminants and a push towards non-chemical farming has led researchers to search for alternative forms of anthelmintics. The efficacy of treating sheep by using natural garlic extract with respect to changes in weight, fecal egg counts (FEC), and packed cell volume (PCV) was investigated. Sheep were treated every 4 weeks for 8 weeks with saline (control) Ivermectin, or natural garlic extract and samples were collected weekly to determine FEC and PCV. Sheep were weighed at the time of sample collection to determine weight change. There were no significant differences between …
Section Abstracts: Agriculture, Forestry, And Aquaculture Science
Section Abstracts: Agriculture, Forestry, And Aquaculture Science
Virginia Journal of Science
Abstracts of the Agriculture, Forestry, and Aquaculture Science Section for the 88th Annual Meeting of the Virginia Academy of Science, May 20-21, 2010, James Madison University, Harrisonburg, VA.
Section Abstracts: Agriculture, Forestry And Aquaculture Science
Section Abstracts: Agriculture, Forestry And Aquaculture Science
Virginia Journal of Science
Abstracts of the Agriculture, Forestry and Aquaculture Section for the 87th Annual Meeting of the Virginia Academy of Science, May 27-29, 2009, Virginia Commonwealth University, Richmond, VA.
Efficiency Of Mechanical Harvest For Immature Vegetable Soybean Pods, Tadesse Mebrahtu, Chris Mullins
Efficiency Of Mechanical Harvest For Immature Vegetable Soybean Pods, Tadesse Mebrahtu, Chris Mullins
Virginia Journal of Science
Since soybean (Glycine max [L.] Merr.) is low in saturated fat and active in reducing blood cholesterol, it is gaining interest as a healthy snack food. Direct consumption of vegetable soybeans is very popular in the Orient. However, the cultivars used in Asia are not adapted to U.S. production systems. The objectives of this study were to determine the efficiency of mechanical harvest and to identify vegetable soybean cultivars adapted for a mechanical harvest system. To implement the objectives, four vegetable soybean cultivars were planted in a randomized complete block design at Randolph Research Farm, Virginia State University. The cultivars …
Prospects Of Kenaf As An Alternative Field Crop In Virginia, Harbans L. Bhardwaj, Charles L. Webber Iii
Prospects Of Kenaf As An Alternative Field Crop In Virginia, Harbans L. Bhardwaj, Charles L. Webber Iii
Virginia Journal of Science
Kenaf (Hibiscus cannabinus L.), a warm-season annual plant, has shown potential as an alternate source of fiber in the United States. Although preliminary research has indicated feasibility of kenaf production in Virginia, production details are lacking. Field experiments were conducted during 1995 and 1996 to determine optimal row spacing and fertilizer needs, and to compare available kenaf cultivars. Although results indicated that differences in dry matter yields from four row spacings (30, 60, 90, and 120 cm) and four rates each of N, P, and K fertilizers (50, 100, 150, and 200 kg ha-1) were not …
Environmental Effects On Yield And Agronomic Traits Of Common Bean (Phaseolus Vulgaris L.), Tadesse Mebrahtu, Teklu Andebrhan, Ali Mohamed
Environmental Effects On Yield And Agronomic Traits Of Common Bean (Phaseolus Vulgaris L.), Tadesse Mebrahtu, Teklu Andebrhan, Ali Mohamed
Virginia Journal of Science
Common bean (Phaseolus vulgaris L.) demand is increasing with an alarming rate around the world, especially in Latin America, Africa, and Asia. Therefore, increase bean yield per hectare is the best way to meet the world demand rather than expansion of area under cultivation. The objectives of this experiment were to determine the genotypic variations for green bean and dry seed yield and magnitude of genotype x environment interaction effects on yield and yield components of common bean. Thirteen genotypes were planted during the 1992, 1994, and 1995 growing seasons. Genotypes were evaluated for green pod and seed …
Isolation And Fusion Of Cotton Protoplasts, Michael H. Renfroe, Ronald C. Hartwig, Roberta H. Smith
Isolation And Fusion Of Cotton Protoplasts, Michael H. Renfroe, Ronald C. Hartwig, Roberta H. Smith
Virginia Journal of Science
Protoplasts were isolated from five species of Gossypium. Protoplast yield and viability were affected by incubation conditions, osmolarity, purification procedures, and cell source. Using an optimized procedure, highly viable protoplasts were isolated from cell suspensions, callus cultures, and leaf tissue of G. hirsutum, G. arboreum, G. klotzschianum, G. harknessii, and G. herbaceum. Protoplasts of G. harknessii were enucleated and successfully fused with protoplasts of G. hirsutum.