AgustinaD., PurnamasariM. I., KarmawanL. U., and SuwantoA. “Effect of Synthetic Fertilizer on Diazotrophic Bacteria in Secondary Forest and Oil Palm Soils in Central Kalimantan”. HAYATI Journal of Biosciences, Vol. 32, no. 1, Nov. 2024, pp. 106-1, doi:10.4308/hjb.32.1.106-116.