美国的农业生产是一个奇迹。不到2％的美国人较好地保证了所有美国人的衣、食、农、牧业生产,成本比世界上任何其它国家都低。为了保证美国人对农牧产品的需求,只需要动用美国60％的农业生产力,其余40％可用作它用。这就出现了问题:美国怎样合理而有效地使用这40％的剩余生产力呢? America’s agricultural production is a miracle. Less than 2% of Americans better ensure the production of clothing, food, agriculture and animal husbandry for all Americans at a lower cost than any other country in the world. To ensure Americans’ demand for agricultural and pastoral products, they only need 60% of the agricultural productivity in the United States and the remaining 40% can be used for other purposes. This raises the question: How can the United States use this 40% residual productivity rationally and effectively?