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The Weather Factor: Incorporating Weather Variance Into Computer Simulation

Published online by Cambridge University Press:  12 June 2017

J. R. Williams ,
C. W. Richardson  and
R. H. Griggs
J. R. Williams
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., 808 East Blackland Road, Temple, TX 76502
C. W. Richardson
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., 808 East Blackland Road, Temple, TX 76502
R. H. Griggs
Affiliation:
Texas Agric. Exp. Stn., 808 East Blackland Road, Temple, TX 76502
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Abstract

The effect of weather variation on pesticide losses was estimated with the Erosion-Productivity Impact Calculator (EPIC) model. Weather variations had little effect on pesticide loss from a hypothetical site near Memphis, TN, but the effect was more dramatic and in the expected direction at Des Moines, IA. Atrazine losses at Des Moines were reduced by lowering relative humidity or rainfall intensity. Increasing the CO2 level from 300 to 660 ppm slightly increased atrazine losses. Results from these two sites are very limited and only serve to demonstrate modeling potential for addressing weather/pesticide problems. Further, more comprehensive studies are needed to better estimate pesticide loss sensitivity to weather variation.

Keywords

Atrazine, 6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2,4-diaminePesticidemodelrainfallhumidityCO2atrazinecyanazinedicambametolachlor
Type
Symposium
Information
Weed Technology , Volume 6 , Issue 3 , September 1992 , pp. 731 - 735
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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