Fisrt-Order Degradation of Pesticides Introduction, SoilPhysics, Oklahoma State University


First-Order Degradation of Chemicals in Soils

Authors:	D.L. Nofziger and Jinquan Wu
Purpose:	Degradation of pesticides in soils is usually described using first-order kinetics. This software uses that model to display graphs and tables of concentration versus time for user-defined degradation rates and initial concentrations. It was designed as an introductory educational tool.
Latest Version:	2005.05.04, May 4, 2005 Version History
Documentation:	A manual outlining the purpose, model, and simplifications used in this program is available here.
Computer Platform:	The software is written in Java and runs as a Web Start application. The Java run-time package and Web Start software are available free of charge from Sun Microsystems, Inc. The program was developed and tested on various Windows platforms as well as on Linux and MacOS X. We recommend 256 MB or more of Random Access Memory. Approximately 40 MB of disk space is required.
Link for Java Software:	Before a Java Web Start program can be used on a computer, the supporting software must be installed. This is needed only 1 time per computer no matter how many different applications use it. Sun Microsystems Inc provides this package free of charge at http://java.sun.com/or it can be downloaded here. If this is the first time you are using it, just download the file from the site above. Follow the instructions given there for installations. I recommend that you accept the default values proposed in the install process.
Download/Execute Program:	Click here to download and start the program. If you use the program more than one time, you will be given the option of storing it on your local computer. You can then start the program without coming to this page with a web browser.
Contact:	D.L. Nofziger, Department of Plant and Soil Sciences, 368 Ag Hall, Oklahoma State University, Stillwater, OK 74078. E-mail: david.nofziger@okstate.edu All contents © 2002, 2003