Abstract Moderate agriculture scale management is the development direction for agriculture in future.This paper took scale economics theory as the basis,and found out the optimal watermelon planting scale in Beijing was 6 670 m2 by establishing Translog production function model and using DEA envelopment analysis method.Besides,this study also discovered that age of farmer household and education level had significant influence on watermelon planting.But along with the aging of rural population becoming worse day by day,train professional farmer of new type could help to link up the 2 generations engaged in watermelon planting.
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