Norsuwan*, Tupthai, Sittichai Lodkhew, Kularb Utasuk, Thakoon Panyasai, and Chanchai Sangchyoswat. 2018. “Soil Nutrient Balance in Farming Systems of the Agricultural Resource System Research Station, Chiang Mai, Using Plot Database for Rapid Assessment”. CURRENT APPLIED SCIENCE AND TECHNOLOGY 17 (2). Bangkok, Thailand:140-53. https://li01.tci-thaijo.org/index.php/cast/article/view/122447.