SusilaA. D. (2017). Fertilizer Recommendation: Correlation and Calibration Study of Soil P Test for Yard Long Bean (Vigna unguilata L.) on Ultisols in Nanggung-Bogor. Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy), 38(3). https://doi.org/10.24831/jai.v38i3.14968