Features: mainly planting wheat and corn, with large production scale; High degree of mechanization; The commodity rate of grain is high.
Plain in the middle and lower reaches of the Yangtze River: rice planting (also known as monsoon paddy field agriculture)
Features: small-scale production, small-scale operation; High grain yield per unit area; The commodity rate of grain is low; Low degree of mechanization and high dependence on water conservancy projects; Low level of science and technology.