Dermiyati, ., Lumbanraja, J., Banuwa, I.S., Triyono, S., Maulida, O. and Agsari, D. 2016. Application of Organonitrofos and Inorganic Fertilizer on Cassava (Manihot Esculenta Crantz) in Ultisol Soil. JOURNAL OF TROPICAL SOILS. 20, 3 (Sep. 2016), 167–172. DOI:https://doi.org/10.5400/jts.2015.v20i3.167-172.