Adi DD, Lubis I, Suwarto S, Sugiyanta S. Determination of the Optimum Rates for N, P, and K Fertilizer for Upland Rice Variety “IPB 9G”. JTCS [Internet]. 2019 Oct. 24 [cited 2026 Feb. 22];6(03):164-73. Available from: https://j-tropical-crops.com/index.php/agro/article/view/272