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Zhongyufa 種芋法 "Methods of taro cultivation", also called Yujing 芋經 "The book of taro", is a short agricultural treatise written during the Ming period 明 (1368-1644) by Huang Xingzeng 黃省曾 (1496-1546), courtesy name Mianzhi 勉之, style Wuyue Shanren 五嶽山人. He hailed from Wuxian 吳縣, Jiangsu and obtained the juren degree during the Jiajing reign-period 嘉靖 (1522-1566).
His book is divided into four chapters and quotes extensively from ancient books, except for the chapter Yifa 藝法, in which the author describes contemporary methods of cultivating taro, as he observed them in his environment.
The Zhongyufa or Yujing is included in the series Mingshi xueshan 明世學山, Bailing xueshan 百陵學山, Yimen guangdu 夷門廣牘, Xu shuofu 續說郛, Congshu jicheng chubian 叢書集成初編 and Yingyin Yuan-Ming shanben congshu 景印元明善本叢書.
Huang is better known for his collection Nongpu sishu 農圃四書, which includes four writings on rice cultivation, sericulture, chrysanthemum culture, and fish farming.