The Ag Decision Maker land value page is http://www.extension.iastate.edu/agdm/wdvalues.html . On Tuesday morning results of the 2016 survey were released. While the publication http://www.extension.iastate.edu/agdm/wholefarm/pdf/c2-70.pdf does have a Ringgold county value on page 4, note that it is an average reported for a survey. Each parcel has a unique set of attributes, and we advise that people have a professional appraisal before entering into a transaction. Accredited Rural Appraisers can be found at the American Society of Farm Managers and Rural Appraisers site http://www.asfmra.org .
Field Agricultural Economist
Iowa State University Extension