Harianti, M., Sutandi, A., Saraswati, R., Maswar, M., & Sabiham, S. (2018). ENZYME ACTIVITY IN RELATION TO TOTAL K, Ca, Mg, Fe, Cu AND Zn IN THE OIL PALM RHIZOSPHERE OF RIAU’S PEATLANDS, INDONESIA. BIOTROPIA, 25(3), 211–223. https://doi.org/10.11598/btb.2018.25.3.862