Kuantan Singingi Regency is the largest rubber production center in Riau. Based on plantation data, Kuantan Singingi Regency, Gunung Toar District, Sentajo Raya District and Kuantan Tengah District are the subdistricts with the highest production of rubber in Kuantan Singingi Regency, and the subdistricts with the most planters are affiliated with the Apkarkusi institution. The objectives of th…