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江苏溧阳县红旗人民公社位于北纬31°21’—31°28’,东经119°24’—119°30’,略呈西北至东南方向的斜长方形,属亚热带季风气候。全区地势西高东低,西部及西南部边缘低山,海拔高约在30～200公尺,成土母质主为酸性岩石风化物(有石英砂岩和安山斑岩等);西半部的丘陵及微显起伏的平原地区,其海拔高约在5～30公尺,成土母质主要为第四纪红色粘土及近代河流冲积物;东半部平原低地海拔高多在5公尺以下,成土母质主为近代河流冲积物及湖积冲积物。
Hongyang People’s Commune, Liyang County, Jiangsu Province is located at a latitude of 31 ° 21’-31 ° 28’N and a longitude of 119 ° 24’-119 ° 30’E with an obliquely rectangular shape from northwest to southeast, which belongs to a subtropical monsoon climate. The terrain is high in the east and low in the east, low in the west and southwest, and the elevation is about 30 to 200 meters. The main material of the mother earth is acidic rock weathering material (quartz sandstone and andesite porphyry, etc.) Hilly and slightly undulating plains, the elevation of about 5 to 30 meters, the parent material is mainly Quaternary red clay and modern river alluvial; the eastern half of the plain low altitude more than 5 meters, The main material for the mother soil for the alluvial rivers and alluvial sediments.