Anni Yuniarti, Benny Joy, Dirga Sapta Sara, Fazrin, and Intan. “The Effect of N, P, K and Si Fertilizers on Some Soil Chemical Properties, N, P Uptake and Growth of Black Rice (Oryza Sativa L. Indica) in Ultisols”. International Journal of Life Science and Agriculture Research, vol. 3, no. 2, Feb. 2024, pp. 64-70, doi:10.55677/ijlsar/V03I2Y2024-02.