| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
The Winand Staring Centre for Integrated Land, Soil and Water Research, P.O. Box 125, 6700 AC Wageningen, the Netherlands;
National Inst. of Public Health and Environ. Protection, P.O. Box 1, 3720 BA Bilthoven, the Netherlands.
* Corresponding author.
ABSTRACT
Pesticide leaching to ground water at 1 m depth and pesticide persistence in the plow layer were calculated with a mathematical model for a sandy soil continuously cropped with maize (Zea mays L.) and exposed to weather conditions in a temperate climate. The pesticide was applied in spring. In the model, water flow was described by Darcy's law and water uptake by the crop was included. Dally averages of meteorological conditions (rainfall, evapotranspiration, soil temperature) were used as input. The model assumes first-order transformation, equilibrium sorption (Freundlich equation), and passive plant uptake. Pesticide leaching and persistence were calculated as a function of pesticide sorption (characterized by the organic-matter/water distribution coefficient, Kom) and of transformation rate. It was found that pesticide leaching is very sensitive to both Kom and the transformation rate: changing Kom or the transformation rate by a factor of 2 changes the fraction of the dose leached typically by about a factor of 10. Pesticide persistence in the plow layer was found to be sensitive to Kom at low transformation rates and sensitive to the transformation rate at high Kom values. Additional calculations showed that autumn application results in much higher leaching of nonsorbing pesticides with short half-lives than spring application (difference of two orders of magnitude).
This article has been cited by other articles:
|
|
 |
|
  J. Gaultier, A. Farenhorst, J. Cathcart, and T. Goddard Regional Assessment of Herbicide Sorption and Degradation in Two Sampling Years J. Environ. Qual., August 8, 2008; 37(5): 1825 - 1836. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Farenhorst, S. K. Papiernik, I. Saiyed, P. Messing, K. D. Stephens, J. A. Schumacher, D. A. Lobb, S. Li, M. J. Lindstrom, and T. E. Schumacher Herbicide Sorption Coefficients in Relation to Soil Properties and Terrain Attributes on a Cultivated Prairie J. Environ. Qual., May 1, 2008; 37(3): 1201 - 1208. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. Tiktak, J. J. T. I. Boesten, A. M. A. van der Linden, and M. Vanclooster Mapping Ground Water Vulnerability to Pesticide Leaching with a Process-Based Metamodel of EuroPEARL. J. Environ. Qual., July 1, 2006; 35(4): 1213 - 1226. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. Farenhorst Importance of Soil Organic Matter Fractions in Soil-Landscape and Regional Assessments of Pesticide Sorption and Leaching in Soil Soil Sci. Soc. Am. J., April 19, 2006; 70(3): 1005 - 1012. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. M. L. Lindahl, J. Kreuger, J. Stenstrom, A. I. Gardenas, G. Alavi, S. Roulier, and N. J. Jarvis Stochastic Modeling of Diffuse Pesticide Losses from a Small Agricultural Catchment J. Environ. Qual., June 7, 2005; 34(4): 1174 - 1185. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Larsbo and N. Jarvis Simulating Solute Transport in a Structured Field Soil: Uncertainty in Parameter Identification and Predictions J. Environ. Qual., March 1, 2005; 34(2): 621 - 634. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Roulier and N. Jarvis Modeling Macropore Flow Effects on Pesticide Leaching: Inverse Parameter Estimation Using Microlysimeters J. Environ. Qual., November 1, 2003; 32(6): 2341 - 2353. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
H. C. Suter, R. E. White, L. K. Heng, and L. A. Douglas Sorption and Degradation Characteristics of Phosmet in Two Contrasting Australian Soils J. Environ. Qual., September 1, 2002; 31(5): 1630 - 1635. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. J. van Alphen and J. J. Stoorvogel Effects of Soil Variability and Weather Conditions on Pesticide Leaching-- A Farm-Level Evaluation J. Environ. Qual., May 1, 2002; 31(3): 797 - 805. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
I. G. Dubus and C. D. Brown Sensitivity and First-Step Uncertainty Analyses for the Preferential Flow Model MACRO J. Environ. Qual., January 1, 2002; 31(1): 227 - 240. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
Q.L. Ma, J. Gan, S.K. Papiernik, J.O. Becker, and S.R. Yates Degradation of Soil Fumigants as Affected by Initial Concentration and Temperature J. Environ. Qual., July 1, 2001; 30(4): 1278 - 1286. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 F. WORRALL, D. A. WOOFF, A. H. SEHEULT, and F. P. A. COOLEN New approaches to assessing the risk of groundwater contamination by pesticides Journal of the Geological Society, July 1, 2000; 157(4): 877 - 884. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| The SCI Journals | Agronomy Journal | Crop Science | |||
| Journal of Natural Resources and Life Sciences Education |
Vadose Zone Journal | ||||
| Soil Science Society of America Journal | Journal of Plant Registrations | The Plant Genome | |||
