Department of Soil Science;
Kasetsart University;
Nakhon Pathom;
Thailand;
Department of Soil Science;
Kasetsart University;
Bangkok;
Thailand;
Eco-Community Vigor Foundation;
Bangkok;
Thailand;
Department of Tropical Plant and Soil Sciences;
University of Hawaii at Manoa;
Honolulu;
USA;
Empowering; Farmer; Leaders; Site-Specific; Nutrient; Management; Smart-Farming; Tailor-Made; Fertilizer; Technology; Soil; Test; Kit; Soil; Clinic;