D. Sutantio, H. A. Kurniawan, and C. M. M. S. Adzahar, “Analysis of Plant, Tuber, and Soil Samples for Fertilizer Comparison Controlled Release (CRF) and Conventional Crops Sweet Potato (Ipomoea batatas L.) on Sandy Soil”, JUATIKA, vol. 8, no. 1, pp. 332 -, Jan. 2026.