naa a22 4500 510751113 CHVBK 20180411083105.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11270-013-1747-2 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1747-2 Acetochlor Persistence in Surface and Subsurface Soil Samples [Elektronische Daten] [Rubem Oliveira Jr., William Koskinen, Carrie Graff, James Anderson, David Mulla, Edward Nater, Diego Alonso] Although degradation data for herbicides are essential in understanding their potential to be contaminants and are indispensable inputs in computer-based modeling of their fate in environment, most available data only concern surface soils. Soil samples, collected at two depths from four representative sites of a 31.4-ha field located in Blue Earth County, MN, USA, were used to determine acetochlor dissipation under laboratory conditions. A field study was also carried out within a 16-ha watershed in Dakota County, MN, USA, where 38 locations were sampled to obtain sample representative of the full range of soil properties found within the watershed. Acetochlor DT50 values ranged from 6.51 to 13.9days for surface soils and from 20.3 to 26.7days for subsurface soils. DT90 values were a factor of four times longer than for DT50 values. Field DT50 values for acetochlor dissipation were not significantly different for the 2years, 5.7 ± 2.5 and 7.7 ± 4.5days. Dissipation was slightly faster in the field as compared to the laboratory; however, the difference seems insignificant in view of the wide range in soil properties in Minnesota. In both studies, acetochlor would be classified as slightly persistent. For acetochlor, laboratory dissipation studies can be considered representative of field dissipation for the soils and climatic conditions in this study. Inclusion of subsoil degradation data in mathematical models used for ground water risk assessment may improve their capability of predicting potential movement of acetochlor to groundwater. Springer Science+Business Media Dordrecht, 2013 Degradation nationallicence Herbicide nationallicence Half-life nationallicence Acetanilides nationallicence Oliveira Jr. Rubem Núcleo de Estudos Avançados em Ciência das Plantas Daninhas (NAPD/UEM), Universidade Estadual de Maringá, Departamento de Agronomia, Av. Colombo, 5790, 87020-900, Maringá, PR, Brazil aut Koskinen William U.S. Department of Agriculture, Agricultural Research Service, 1991 Upper Buford Circle, 55108, St. Paul, MN, USA aut Graff Carrie Department of Soil, Water & Climate, University of Minnesota, 439 Borlaug Hall, 1991 Upper Buford Circle, 55108, St. Paul, MN, USA aut Anderson James Department of Soil, Water & Climate, University of Minnesota, 439 Borlaug Hall, 1991 Upper Buford Circle, 55108, St. Paul, MN, USA aut Mulla David Department of Soil, Water & Climate, University of Minnesota, 439 Borlaug Hall, 1991 Upper Buford Circle, 55108, St. Paul, MN, USA aut Nater Edward Department of Soil, Water & Climate, University of Minnesota, 439 Borlaug Hall, 1991 Upper Buford Circle, 55108, St. Paul, MN, USA aut Alonso Diego Núcleo de Estudos Avançados em Ciência das Plantas Daninhas (NAPD/UEM), Universidade Estadual de Maringá, Departamento de Agronomia, Av. Colombo, 5790, 87020-900, Maringá, PR, Brazil aut Water, Air, & Soil Pollution Springer Netherlands 224/10(2013-10-01), 1-9 0049-6979 224:10<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1747-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1747-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Oliveira Jr Rubem Núcleo de Estudos Avançados em Ciência das Plantas Daninhas (NAPD/UEM), Universidade Estadual de Maringá, Departamento de Agronomia, Av. Colombo, 5790, 87020-900, Maringá, PR, Brazil aut NATIONALLICENCE 700 1- Koskinen William U.S. Department of Agriculture, Agricultural Research Service, 1991 Upper Buford Circle, 55108, St. Paul, MN, USA aut NATIONALLICENCE 700 1- Graff Carrie Department of Soil, Water & Climate, University of Minnesota, 439 Borlaug Hall, 1991 Upper Buford Circle, 55108, St. Paul, MN, USA aut NATIONALLICENCE 700 1- Anderson James Department of Soil, Water & Climate, University of Minnesota, 439 Borlaug Hall, 1991 Upper Buford Circle, 55108, St. Paul, MN, USA aut NATIONALLICENCE 700 1- Mulla David Department of Soil, Water & Climate, University of Minnesota, 439 Borlaug Hall, 1991 Upper Buford Circle, 55108, St. Paul, MN, USA aut NATIONALLICENCE 700 1- Nater Edward Department of Soil, Water & Climate, University of Minnesota, 439 Borlaug Hall, 1991 Upper Buford Circle, 55108, St. Paul, MN, USA aut NATIONALLICENCE 700 1- Alonso Diego Núcleo de Estudos Avançados em Ciência das Plantas Daninhas (NAPD/UEM), Universidade Estadual de Maringá, Departamento de Agronomia, Av. Colombo, 5790, 87020-900, Maringá, PR, Brazil aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/10(2013-10-01), 1-9 0049-6979 224:10<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer