This question?
(1) Analysis material 1: The contradiction between man and land in the north and south of China is more prominent in the region. (2 points)
(2) "The lake is wide and ripe, and the world is full", and the local agricultural regional type is. (2 points)
(3) From the data in Table 2, from 1970s to 1990s, the contribution rate of Yangtze River producing areas to national grain output showed an upward trend, and compared with Songliao producing areas, its changing characteristics were as follows: In the same period, compared with southern producing areas, the changing characteristics of per capita grain possession in northern producing areas of China were as follows. (4 points)
(4) Analyze the main reasons for the decline in the contribution rate of the Yangtze River Delta in southern producing areas to national grain production. (6 points)
Answer: "(1) South (2 points)
(2) monsoon paddy field agriculture (2 points)
(3) continuous decline (2 points) continuous growth (2 points)
(4) Promoting urbanization or industrialization to occupy part of cultivated land; (2 points)
The development of suburban agriculture or the construction of export agricultural products bases have reduced the area of grain crops; (2 points)
The dense river network and broken cultivated land are not conducive to large-scale mechanized production; (2 points)