根据土壤类型及气候条件,美国南部地区可分为五个区域:(1)东海岸区域,包括马里兰州、弗吉尼亚州、北卡罗琳那州以及南卡罗琳那州北部的沿海平原和沿海低洼地区;(2)东南区域,主要由海湾地区(包括南卡罗琳那州的南部的沿海平原土壤类型组成);(8)中南区域,密西西比河东部的山前地带和丘陵黄土地区;(4)三角 Depending on the type of soil and climatic conditions, the southern United States can be divided into five regions: (1) East Coast regions, including coastal plains and coastal lowlands in the states of Maryland, Virginia, North Carolina, and northern South Carolina ; (2) the southeastern region, which is dominated by the Gulf region (including the type of soils in the southern coastal plains of South Carolina); (8) the Central South Region, the foreland belt in the eastern Mississippi and the hilly loess regions; and