The potential use of bio-activated potassium-bearing mineral from East Java for K fertilizer Potensi mineral pembawa kalium asal Jawa Timur yang dibio-aktivasi sebagai pupuk K. MP [Internet]. 2016 Mar. 7 [cited 2026 Sep. 3];80(2). Available from: https://mp.iribb.org/index.php/mpjurnal/article/view/33