Much like the rest of southern Taiwan, 60 % of the land in Kangshan is used for agriculture. While rice and sugarcane are most prevalent, mangos, lichees, longan fruit and dates also grow on the hillsides.
岡山鎮耕地面積約佔全鎮土地的 60 %，稻米、甘蔗最常見；小崗山附近坡地多種芒果、荔枝、龍眼、棗子等水果，與南部一般農村景觀大同小異。