Barus, J. and Murni, A.M. 2018. Recommendation of Phosphate and Potassium Fertilizers for Maize at Five Locations in Lampung. JOURNAL OF TROPICAL SOILS. 15, 2 (Apr. 2018), 127–132. DOI:https://doi.org/10.5400/jts.2010.v15i2.127-132.