Black farmers, whose numbers already have dwindled precipitously over the past century, face new hardships after suffering poor yields last year because they were sold "fake" soybean seeds marketed at a Memphis trade show, members of a group representing African-American growers said. Leaders of the Memphis-based Black Farmers and Agriculturalists Association have filed a class-action lawsuit against Stine Seed Co., the nation's largest independent seed-producer, accusing the Adel, Iowa, firm of targeting African-Americans for sales of defective seeds. The suit alleges that black farmers who attended the 67th Annual Mid-South Farm & Gin Show at the Memphis Cook Convention Center in March of last year bought more than $100,000 worth of Stine seeds. But the "certified" seeds the growers had paid for were switched with inferior ones at a warehouse near Sledge, Mississippi, according to the suit.