A. Budiargo, R. Purwanto, and . Sudradjat, “Manajemen Pemupukan Kelapa Sawit (Elaeis guineensis Jacq.) di Perkebunan Kelapa Sawit, Kalimantan Barat”, Bul. Agrohorti, vol. 3, no. 2, pp. 221–231, May 2015, doi: 10.29244/agrob.v3i2.14986.