Lạc Fields and Tidal Irrigation in Early Vietnam
The earliest record that tells us something about life in the Red River Delta in ancient times is Li Daoyuan’s sixty-century Shuijing zhu 水經注 (Annotated Classic of Waterways). That book cites an earlier work, the late-third or early-fourth-century Jiaozhou waiyu ji 交州外域記 (Annotated Classic of Waterways), to say the following about agricultural practices:
“In the past, before Jiaozhi had commanderies and districts, the land had lạc fields. These fields followed the rising and falling of the. . [KEY WORD]”
交趾昔未有郡縣之時,土地有雒田,其田從潮水上下. . .