Full TGIF Record # 203429
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DOI:10.1080/03601230500189345
Web URL(s):http://www.tandfonline.com/doi/full/10.1080/03601230500189345
    Last checked: 04/24/2012
    Access conditions: Item is within a limited access website
    Notes: Article is full access
http://www.tandfonline.com/doi/pdf/10.1080/03601230500189345
    Last checked: 04/24/2012
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    Access conditions: Item is within a limited access website
    Notes: Article is full access
Publication Type:
i
Report
Author(s):Raturi, S.; Islam, K. R.; Caroll, M. J.; Hill, R. L.
Author Affiliation:Raturi, Caroll and Hill: Department of Natural Resource Sciences and Landscape Architecture, University of Maryland, College Park, Maryland; Islam: Soil and Water Resources, Ohio State University South Centers, Piketon, Ohio
Title:Carbaryl, 2,4-D, and Triclopyr adsorption in thatch-soil ecosystems
Source:Journal of Environmental Science and Health: Part B: Pesticides, Food Contaminants, and Agricultural Wastes. Vol. 40, No. 5, 2005, p. 697-710.
# of Pages:14
Publishing Information:New York, New York: Marcel Dekker
Related Web URL:http://www.tandfonline.com/doi/abs/10.1080/03601230500189345
    Last checked: 04/24/2012
    Notes: Abstract only
Keywords:TIC Keywords: 2,4-D; Adsorption rate; Agrostis; Carbaryl; Comparisons; Thatch; Triclopyr; Zoysia
Abstract/Contents:"Thatch development in intensively managed turf sites may cause environmental concerns for greater sorption or leaching of applied chemicals in terrestrial ecosystems. To determine the adsorption potential of Carbaryl (1-Napthyl N-methylcarbamate), 2,4-D (2,4-dichloro-phenoxyacetic acid), and Triclopyr (3,5,6-trichloro-2-pyridinyloxyacetic acid) in turf ecosystems, composite thatch and underlying soil samples from three- and six-year-old stands of cool-season Southshore creeping bentgrass (Agrostis palustris Huds.) and warm-season Meyer zoysiagrass (Zoysia japonica Steud.) were collected. The samples were processed and analyzed for total organic carbon (COrg); extractable (CExt), humic (CHA) and fulvic acid (CFA); anthrone reactive nonhumic carbon (ARC) fractions; and CHA and CFA associated iron (Fe) contents. Pesticide adsorption capacity (K f ) and intensity (1/n), organic carbon partition coefficient (K OC) and Gibbs free energy change (Δ G) were calculated for thatch materials and the underlying soils using a modified batch/flow technique. Both bentgrass (BT) and zoysiagrass thatch (ZT) contained a greater concentration of CExt, CFA, CHA, and ARC than the respective soils (BS and ZS). The CExt, CFA, CHA, and ARC concentration was higher in BT compared with ZT. The BT contained a greater concentration of bound Fe in both CFA and CHA fractions than in BS, whereas ZT had more bound Fe in CHA fraction than in ZS. On average, the BT had a greater concentration of bound Fe in CExt, CFA, and CHA fractions than in the ZT. Among the pesticides, Carbaryl had higher K f and 1/n values than 2,4-D and Triclopyr for both thatch and soil. Although the K OC and Δ G values of Carbaryl were higher in both BT and ZT than in the underlying soils, the K OC and Δ G values of 2,4-D were significantly higher in BS and ZS than in the overlying thatch materials. The 2,4-D and Triclopyr had higher leaching indices (LI) than Carbaryl for both BT and ZT materials than the respective soils. The Carbaryl, however, had a higher LI for soils than for thatch materials. Averaged across thatch materials and soils, COrg accounted for 96, 85, and 84% variations in Carbaryl, 2,4-D, and Triclopyr adsorption, respectively. Among the COrg fractions, lignin followed by CFA and CHA accounted for greater adsorption of pesticides, especially Carbaryl. The concentration of CHA and CFA bound Fe did not correlate with K f and 1/n values of pesticides."
Language:English
References:35
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Raturi, S., K. R. Islam, M. J. Caroll, and R. L. Hill. 2005. Carbaryl, 2,4-D, and Triclopyr adsorption in thatch-soil ecosystems. J. Environ. Sci. Health. 40(5):p. 697-710.
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DOI: 10.1080/03601230500189345
Web URL(s):
http://www.tandfonline.com/doi/full/10.1080/03601230500189345
    Last checked: 04/24/2012
    Access conditions: Item is within a limited access website
    Notes: Article is full access
http://www.tandfonline.com/doi/pdf/10.1080/03601230500189345
    Last checked: 04/24/2012
    Requires: PDF Reader
    Access conditions: Item is within a limited access website
    Notes: Article is full access
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