Oklahoma State University

Soil Test Interpretation Introduction, Soil Physics, Oklahoma State University


Oklahoma Cooperative Extension Service

Soil Test Interpretation and Fertilizer Decision Support



Hailin Zhang and D. L. Nofziger



To enable farmers to interpret and utilize results from the OSU – OCES Soil Testing Laboratory for managing crop nutrients using calibrations carried out in Oklahoma. 

To provide fertilizer rates to meet the crop nutrient needs. 

To calculate the value of animal manure as a nutrient source for specific field conditions.


Latest Version:

2005.12.15,  December 15, 2005



The recommendations used in the software were taken from OSU Fact Sheet 2225, “OSU Soil Test Interpretations” by Hailin Zhang, Gordon Johnson, Bill Raun, Nick Basta, and Jeff Hattey. Related fact sheets can be found at the Soil, Water, and Forage Analytical Laboratory site


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 128 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

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