Sutriadi, Mas Teddy, Diah Setyorini, and Dedi Nursyamsi. 2019. “Calibration of Soil Phosphorus Test for Upland Rice Grown on Typic Kandiudox, Way Pangubuan, Lampung”. JOURNAL OF TROPICAL SOILS 23 (2):81-89. https://doi.org/10.5400/jts.2018.v23i2.81-89.