Company Profile

Castle International Resources is the leading source of information about the agricultural use of Cross-Linked Polyacrylamide in the world (pronounced 'poly-ah-krill-ah-mid' - 'CLP' for short). For nearly three 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. Castle also provides granular & tablet forms of Linear Polyacrylamide ('PAM' for short), and Polyvinyl Acetate ('PVA' for short), both are used for erosion and dust control. Castle is a distributor for the entire DeWitt line of landscape fabrics and products. Garden drip irrigation, seedling planting tube & tray systems, and drought remediation products are also available.

Hydrosource^® CLP looks like rock salt when dry and captures up to 400 times its weight in rainwater. Used in agriculture, CLP 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 reliably 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.

Hydrosource^® PAM is available in slow release tablets, effervescent tablets and granular form. Slow release tablets are used in mesh bags staked into water flow for flooded field irrigation and hung above wheels on pivot irrigation systems to stop erosion, and for lining water canals with silt to prevent leaks. Effervescent tablets are placed in a water truck tank of water, allowed to dissolve then sprayed for dust control. Granular PAM is used for erosion control for flooded filed irrigation and for over-seeding.

Hydrosource^® PVA comes in a liquid form. Mixed in water and distributed by water truck, PVA is used for making inexpensive temporary roadways, airfields, helicopter landing pads and surfaces that perform like asphalt or concrete. PVA is used in a concentrated form to hold down mine tailing piles and for many other similar commercial & industrial applications.

Contact Information

After having a look at the Products & Services link (and the library of polymer articles), here is how to get more information:

Director of Sales and Marketing - Laird Maxwell - (623) 980-4268

Note: In Fall 2008 the sales office Western Polyacrylamide Inc. 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.