Rambe, T. R., M. Tua, P. Wirawan, J. Juliarni, and S. Sriwidodo. “Effect of Application of Various Types of Controlled Release Fertilizers on Vegetative Growth of Immature Oil Palm (Elaeis Guineensis Jacq.) During the Unyielding Cropphase”. Contributions of Central Research Institute for Agriculture, vol. 20, no. 2, Apr. 2026, pp. 82-91, doi:10.59651/cceria.v20i2.412.