Widodo, Hupudio Hutomo, and . Sudradjat. “Peranan Pupuk Kalsium Pada Tanaman Kelapa Sawit (Elaeis Guineensis Jacq.) Belum Menghasilkan”. Buletin Agrohorti 4, no. 3 (December 8, 2016): 276–281. Accessed March 22, 2026. https://journal.ipb.ac.id/bulagron/article/view/14256.