... ProQuest Information and Learning Company 300 North Zeeb Road P.O Box 1346 Ann Arbor, MI 48106-1346 DEVELOPMENT OF ON-THE-GO SOIL SENSORS FOR MAPPING SOIL pH, POTASSIUM AND NITRATE CONTENTS Balaji ... laboratory evaluation of soil sensors Soil names according to the USDA survey, average organic matter content, and ranges of test reports for soil pH, exchangeable potassium, and nitrate contents are ... (Sonka et al., 1997) This calls for development of new methodologies of measuring soil properties There is a need and opportunity for development and implementation of sensing technologies, which...