Closer relationships between firms at different stages of production and marketing are emerging as larger commercialized farm operations grow produce and raise animals under contract for processors, retailers or exporters.
随着大型商业化农场的业务按照加工商、零售商或出口商的合同生产农产品和饲养家畜，正在出现公司之间在生产和销售不同阶段更紧密的关系。