During the Eastern Jin and Southern Dynasties, the economy in the south of the Yangtze River developed rapidly. What are the main manifestations of the development of agricultural production?

during the eastern Jin dynasty and the southern dynasties, agriculture in the south generally developed. The more prominent areas are Jing and Yang in the middle and lower reaches of the Yangtze River. Yangzhou was the most economically developed area in the Eastern Jin Dynasty and the Southern Dynasties.

Among them, Jiankang, the capital city, and its surrounding areas have developed rapidly. The Eastern Jin Dynasty established Xinfengtang in Qu 'a (Danyang, Jiangsu), irrigated more than 8 hectares of land. In the Song Dynasty, more than 4, hectares of wasteland were cultivated in the lake. Song immigrated to Jingkou and Gushu, and built Chishan Pond in Jurong. Yangzhou "has a vast land and abundant fields, and people are diligent in their work. When they are one year old or ten years old, they forget hunger in several counties". Sanwu (Wujun, Xing Wu and Huiji) is the most important base of the Eastern Jin government, and its economic development is particularly prominent.

The Eastern Jin Dynasty built a ditang in Wucheng, Xing Wu (Huzhou, Zhejiang) to irrigate thousands of hectares of land. Song built Xing Wu pond in Wucheng and irrigated more than 2, hectares of farmland; Reclaiming lake fields in Huiji area, "all become good businesses". The various expenditures of the Eastern Jin Dynasty and the Southern Dynasties mainly depended on the Three Wu Dynasties. Jing and Xiang areas around Dongting Lake are also developing rapidly. After Liang stopped the soldiers in Yiyang (Xinyang, Henan) town, "the rivers and lakes have to rest and open up six thousand hectares of land. Two years later, the granary was full. "

The areas around central Fujian and Poyang Lake, which are adjacent to Zhejiang, have also developed rapidly. In addition, Huainan area has fertile land and concentrated refugees. There is an irrigated farmland near Shouchun, which is an important grain producing area.

before Yuanjia, Huainan was an economically developed area. At the end of Yuan and Jia Dynasties, Huainan was destroyed due to the Song and Wei Wars. After the management of the Qi and Liang dynasties, the production in some areas between the Yangtze River and Huaihe River also recovered and developed rapidly. Yizhou is known as "Woye Tianfu" and is rich in products. Guangzhou is also a rich economic region.