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Castle International Resources is the leading source of information about the agricultural use of Cross-Linked Polyacrylamide (CLP), in the world. For nearly two decades we've annually sponsored and participated in scores of government and university research projects around the world on the use of CLP soil polymers.

Cross-linked polymer looks like rock salt when dry and captures up to 400 times its weight in rainwater. Used in agriculture, this material makes water and nutrients available to plants at all times, producing outstanding crop yields. CLP-raised plants mature faster, are more disease resistant, and can be effectively grown in areas of the world which are too low in annual rainfall to support cost-effective 'traditional' farming. The use of CLP in complete systems including special UV-stabilized landscape fabric and drip irrigation are the main focus of our current research efforts.

 Contact Information

After having a look at our Products & Services link (where you'll find the library of polymer articles), here is how to get more information:

Toll-Free Product Order Line: (888) 703-0222	Technical Support & Customer Service: (928) 282-4099
Castle International Resources PO Box 4108 Sedona, Arizona, 86336-4108

Please Note: In Fall 2008 the sales office Western Polyacrylamide Inc, at 214 South Elliot in Pryor Oklahoma permanently closed.

In Memoriam

Daniel J. Wofford, Jr., was a retired Foreign Service officer with a farm background and a strong interest in research relating to problems of agriculture and water/soil conservation. He held a B.A. in Asian studies from the University of Oklahoma, and completed four years of graduate work in Far Eastern Studies and Geography at the University of Washington. On retiring from government service, he started Western Polyacrylamide, Inc. and devoted his efforts to researching and developing this promising water-conserving product, cross-linked polyacrylamide, most notably by keeping the price of it affordable for a wide variety of applications.

Apparently in good health, Dan unexpectedly suffered a stroke early in October 1998 and expired shortly thereafter. Dan's remains were interred next to his father's at the family burial site in Arkansas. He is greatly missed by us all.