Following the general trend in demographic change, and enhanced by the large-scale and continuous rural-urban migration, the rural labor force remaining in farming is quickly reducing and aging. This is likely to have significant impact on the labor-intensive agriculture. However, the fast growing of machinery service has provided farmers an opportunity to out-source field work that demands heavy labor inputs. Therefore, the demographic change and development of machinery service may jointly influence farmers' production decision in terms of crop choice and inputs. Household data of Fixed Point Rural Survey (FPRS) are used to examine the potential change in farmers' decisions on crop mix and input uses. It is found out that, under current situations, aging may impact agriculture through changing crop mix, and the choice is largely determined by access to service of farm machine; which, in turn, is likely to be determined by topography.

中文翻译：

---

人口变化及其对农民田间生产决策的影响

随着人口变化的大趋势，以及大规模的，持续的城乡迁移，农村剩余的农业劳动力正在迅速减少和老龄化。这可能对劳动密集型农业产生重大影响。但是，机械服务的快速增长为农民提供了将需要大量劳动力投入的田间工作外包的机会。因此，人口结构的变化和机械服务的发展可能会在作物选择和投入方面共同影响农民的生产决策。定点农村调查（FPRS）的家庭数据用于检查农民在作物混合和投入用途决策方面的潜在变化。结果发现，在当前情况下，衰老可能会通过改变作物结构来影响农业，选择主要取决于获得农机服务的机会；反过来，这很可能由地形决定。