市场体制下,农业由于对相关产业发展具有极大的正外部性,其外部价值没有得到市场反映。在新的历史阶段,农业虽然在国内生产总值中所占的比重越来越低,但农业 Under the market system, due to the great positive externalities of the development of related industries, the external value of agriculture has not been reflected by the market. In the new historical stage, although agriculture accounts for a smaller and smaller share of GDP, agriculture