The plateau on which Linkou is situated is composed of red soil, which is highly acidic and has a high clay content. It is unsuited to rice cultivation and rice paddies take up only 5 percent of the area.
紅土雖美，惟屬酸性土，黏度又高、排水不易，不適宜種植水稻，林口水田僅佔農業用地的百分之五。