Union County Agricultural Ext 901 Main St Maynardville, TN 37807 Phone : (865) 992-8038 Business Category Government Offices-County Regulation Of Agricultural Marketing & Commodities Government Offices & Public Schools Union County Of--county Agricultural Agent Maynardville, TN 37807 Phone : (865) 992-8038 Business Category Government Offices & Public Schools Union County Agricultural Ext 602 John Deere Dr Maynardville, TN 37807 Phone : (865) 992-8038 Business Category Regulation Of Agricultural Marketing & Commodities