Most of the agriculture is rain-fed, and with lack of rain, crop yields are poor.
这里的大部分农业靠降雨维持，如果缺乏降雨，庄稼的收成就很差。
2
Under the B2 scenario of no CO2 fertilization and crop system change, the yield of rain-fed and irrigated maize will separately decrease 2% and 14.3% in 2070s.
Submergence and drought are major constraints to rice (Oryza sativa) production in rain-fed farmlands, both of which can occur sequentially during a single crop cycle.