Black farmers in Mississippi and around the country are bracing for a major seed company merger they say threatens to create a monopoly that will price them out of the farming business. St. Louis-based Monsanto Co. is forging ahead with a plan to purchase Mississippi’s Scott-based cottonseed company Delta and Pine Land, and a national black farmers group says its opposition to the deal has gotten lost in the mix. ”If this merger goes through, it’s going to have a drastic effect on black farmers and small farmers around the country,” said John Boyd Jr., president of the National Black Farmers Association.