Nguyen Hong, P., N. V. G. Nguyễn, U. P. Le Thi, and L. Le Tri. “EFFECTS OF GRANULATED BIO-ORGANIC NPK FERTILIZER ON IMPROVING ORANGE YIELD AND SOIL HEALTH IN THANH HOA PROVINCE”. Hong Duc University Journal of Science, vol. 81, no. 11, Nov. 2025, pp. 54-62, doi:10.70117/hdujs.81.11.2025.1101.