Oklahoma State University

Steady-State Flow Introduction, Darcy's Equation, SoilPhysics, Oklahoma State University




Chemical Movement in Layered Soils



D.L. Nofziger and Jinquan Wu; Original software by D.L. Nofziger and A.G. Hornsby



To serve as a management tool and a decision aid for the application of organic chemicals. CMLS can be used to estimate the movement of chemicals in soils in response to downward movement of water. The model also estimates the degradation of the chemical and the amount remaining in the soil profile. CMLS was specifically formulated for ease of use. All of the parameters required by the model are relatively easily obtained.


Latest Version:

2005.06.01,  June 1, 2005. 

Earlier versions are available here



A manual outlining the purpose of the model, its simplificatyions, and an overview of its use is available here in Adobe pdf format. 

  Supplemental Material: WGEN manual of Richardson and Wright

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/products/j2se 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. 



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 © 2003

Document Actions