Houpi, a township of Tainan Hsien located at austral of the tropic of cancer with enough sunshine, Wusangtou dam water and deep sandy loam or loam soils, is suitable for growing rice.

• 摘要台南县后壁乡位于北回归线南缘，日照充足，以乌山头水库为灌溉水源，有深厚之砂页岩冲积壤土至砂质壤土，甚适合水稻栽培，为台南区农业改良场规划之良质米栽培区，农友普遍具有优良之水稻栽培技术。