R. Abdul Rani, M. N. Nordin, J. . Muslimin, A. F. . Ahmad Sayuti, S. N. A. Baharom, and M. N. . Zubir, “Pineapple Crop Fertiliser Application Method: A Preliminary Study on the Performance and Effectiveness of a Boom Sprayer and a Sprayer Drone”, Adv Agric Food Res J, vol. 4, no. 1, Dec. 2022.