Geography of China the triangular North China Plain. The other two sides are the Pacific coast to the east and the Yangtze River to the southwest. The vertices of this triangle are Beijing to the north, Shanghai to the southeast, and Yichang to the southwest. This alluvial plain, fed by the Yellow and Yangtze Rivers, is one of the most heavily populated regions of China. The only mountains in the plain are the Taishan in Shandong and Dabie Mountains of Anhui. Beijing, at the north tip of the North China Plain, is shielded by the intersection of the Taihang and Yan Mountains. Further
History of agriculture in the People's Republic of China in thinly populated parts of the country, especially in the northeast, but the growing season there was short and the process of land reclamation prolonged and costly. China Proper is divided by the Qinling range into highly dissimilar north and south agricultural areas. In semitropical south China, rainfall is relatively abundant and the growing season long. Rice has been the predominant grain crop. The paddies can generally be irrigated with water from rivers or other sources. Although much of the soil is acid red clay, the heavy use of fertilizer (at one time organic but by the mid-1980s also including