Kirttrakolkal P, Bhromsiri A. Chemical Fertilizer Management for Head Lettuce in the Northern Highland . Thai Agric.Res.J. [internet]. 2008 Dec. 31 [cited 2026 Sep. 30];26(3):275-90. available from: https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/99437