James T. Worm, Sr.; James T. Worm, Jr.; Robert C. Worm,d/b/a Worm Brothers, D/b/a Jim Bob Farms,copartners, Plaintiffs-appellants, v. American Cyanamid Company, a Body Corporate of the State Ofmaine, Defendant-appellee,andsouthern States Cooperative, Incorporated, D/b/a Southernstates Cooperative, Incorporated--preston Service, a Bodycorporate of the State of Virginia; Southern States Prestoncooperative, Incorporated, a Body Corporate of the State Ofvirginia, Defendants.national Agricultural Chemicals Association, Amicus Curiae