(1) Topographic atmospheric circulation (land and sea position) East Dorset is less.
(2) Rainy and foggy days in Sichuan Basin.
(3) Rice planting (monsoon paddy field agriculture) has a dense population and abundant labor force; There is a large demand for grain and a broad market; Planting has a long history and rich experience.
(4) High terrain, low temperature and little precipitation are not feasible; Hydrothermal conditions can not meet the needs of rice growth.
This topic comprehensively investigates the climate factors and the influence of climate on agricultural production and other related knowledge. Problem (1), as can be seen from the figure, the average annual precipitation in the eastern and western parts of China is less than that in the western part, mainly because the western part is far away from the ocean and the terrain is high, so the water vapor is difficult to reach, so the precipitation is less. Question (2): The Sichuan Basin is cloudy and rainy due to the topography, so the solar radiation is weaker than that in the middle and lower reaches of the Yangtze River. Question (3): The agricultural regional type in the middle and lower reaches of the Yangtze River is mainly rice planting (monsoon paddy field agriculture), and the socio-economic conditions are mainly analyzed from the aspects of labor force, market, history and experience. Question (4), this small question is an open question, which may or may not be feasible, but the reason should be reasonable. The main limiting factor is hydrothermal conditions.