Yeh Shu-hui says that early on, when Yuanli farmers were first cultivating the soil and building irrigation channels, the Ta-an River basin would regularly flood, so that the well-nourished paddy fields there would naturally produce high yields.
葉淑蕙說，早年苑裡先民拓土墾荒、疊埂築堤，在火炎山下大安溪沖積扇平原上，形成一畦又一畦的良田，產出來的稻米自然粒粒飽滿。