Taufiq, Abdullah, and Andy Wijanarko. 2019. “Variability of Soybean [glycine Max (L) Merr] Growth in Relation to Chemical Properties of Ultisol from East Lampung”. JOURNAL OF TROPICAL SOILS 17 (1):37-43. https://doi.org/10.5400/jts.2012.v17i1.37-43.