The Jiazhengfa 家政法 "Methods of Household Management" was a book on agriculture written by an unknown author to an unknown early date. It does not appear in any ancientbibliography and is first quoted in Jia Sixie's 賈思勰 treatise Qimin yaoshu 齊民要術 from the Northern Wei period 北魏 (386-534). The surviving fragments were collected by the Qing period 清 (1644-1911) scholar Ma Guohan 馬國翰 and are to be found in his collectanea Yuhanshanfang jiyi shu 玉函山房輯佚書. The fragments deal with the cultivation of vegetables, cattle breeding and the raising of chicks and ducks.
Source: Li Xueqin 李學勤, Lü Wenyu 呂文鬰 (1996). Siku da cidian 四庫大辭典, vol. 2, p. 1645. Changchun: Jilin daxue chubanshe.