Sofyan, Emma Trinurani, Yuliati Machfud, Hilma Yeni, dan Ganjar Herdiansyah. “Absorption of N, P and K Nutrients of Sweet Corn Plants (Zea Mays Saccharata Sturt) Due to the Application of Urea, Sp-36, Kcl Fertilizers and Biofertilizer on Fluventic Eutrudepts from Jatinangor”. Jurnal Agrotek Indonesia (Indonesian Journal of Agrotech) 4, no. 1 (Januari 30, 2019). Diakses Mei 3, 2024. https://journal.unsika.ac.id/index.php/agrotek/article/view/1690.