Yap, C.K., Nor Fatin Najhan Nasrudin, Mohamad Saupi Ismail, Rosimah Nulit, Mohd Hafiz Ibrahim, Muskhazli Mustafa, Chee Wah Yap, Shih Hao Tony Peng, Krishnan Kumar, Wan Hee Cheng, Rio Risandiansyah and Ahmad Dwi Setyawan 2022. Usage of Biofertilizers to Correct the Nutrient Deficiency of Oil Palm (Elaeis guineensis): An Observational Study and Review. Food Science and Engineering. 3, 2 (Sep. 2022), 147–153. DOI:https://doi.org/10.37256/fse.3220221613.