Anni Yuniarti, Benny Joy, Dirga Sapta Sara, Fazrin and Intan 2024. 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 . 3, 2 (Feb. 2024), 64–70. DOI:https://doi.org/10.55677/ijlsar/V03I2Y2024-02.