In accordance with the normal,social and economical conditions in Yanshan piedmont,the indictor system was built for a comprehensive benefit evaluation of crop production.

• 依据燕山山前平原区的自然、社会、经济条件,建立了对该区作物种植生产效益进行综合评价的指标体系,并对目前燕山山前平原区5种主要的作物种植模式进行了效益的综合分析和评价。