WHY CAN'T VIDALIA ONIONS BE GROWN IN IOWA? DEVELOPING A BRANDED AGRICULTURAL PRODUCT
以维达利亚洋葱为例，说明通过立法限制供应、保护商标和品质，农产品可以建立品牌并获得溢价，为爱荷华州等商品农业地区发展高附加值产品提供借鉴。
Declining grain prices, cyclical livestock prices, changing consumer preferences, and intense international competition for agricultural commodity markets have created a need for alternative production and marketing strategies. Iowa producers striving to break away from commodity production and to develop more lucrative value-added and niche markets must figure out how to increase both the consumer appeal and economic value of their products. Even if mild, sweet spring onions were a major cash crop in Iowa, producers could not market them as Vidalia onions. A legislated geographical limitation on supply is part of the success of Vidalia onions as an internationally recognized, branded product that can command a price premium in supermarkets across the United States. Vidalia onions are an example of how responding to consumer demand with a succession of marketing, legislative, and research events has protected a niche market from becoming oversupplied by producers. And, by protecting the name, quality, and image of an agricultural product through state ownership of the trademark, higher values are realized throughout the marketing chain.