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acreage agriculture applied areas average beans breeding buyers canners chemical chips color commodity consumer consumption cooperation cost cucumbers disease economic effective Experiment Station factors farm farmers fertilizer field flavor flower frozen fruits and vegetables fungicide Fusarium wilt green greenhouse tomatoes Growers Association Secy growing grown growth harvest herbicides Horticulture hybrids important improved increase insecticides insects irrigation labor late blight leaf leaf mold lettuce malathion methods muck soils nematodes nitrogen nutrients Ohio organic packaging parathion peas percent phosphorus plastic plastic mulch potash potassium potato chips potato growers practices problems processing processor production public relations residues resistance retail root season seed sell soil test sonic boom specific gravity spray storage studies sulfate of potash supply sweet corn sweet potatoes temperature treatment varieties vegetable crops Vegetable Growers Association vegetable industry VGAA vine weed yields