Tudsri, Sayan, Niran Bumrung, and Yang Jingnay. 1999. “Productivity and Quality of CP-Pangola (Digitaria decumbens cv. CP-1) under Different Managements III Effect of Split Nitrogen Application”. Agriculture and Natural Resources 33 (3). Bangkok, Thailand:303-9. https://li01.tci-thaijo.org/index.php/anres/article/view/240446.