The Red River Delta in the Tenth Century

This essay is about the state of rice agriculturc in the Red River Delta in the tenth century, and is the second part of the histor{cal study of the reclarnation of that delta from the flrst century to the nineteenth century, which aims at understancling the Red River is shown.In Part 5, I point out that in places at thc edgc of the Rcd River Delta, such as Hoa Lrr, the capital of the Dinh and Le dynasties, B6 H5i Kh5u, a dornain of the Sir QJian, Trh Hucrng, a base of Ph4m I.inh C6ng, a patron of a son of Ng6 <2]iyEn, and H6i Hb, a domain of the Sir Quan, a new type of poiitical pewer bad risen during the tenth century.These areas were not suitable for rice cultivation witheut dikcs.So it