Land Values in Greenville(outside of Jackson) Mississippi Catfish Farms

We have some land outside of Greenville that we are looking to possible sell, the type of land that is used for Catfish farms/lumber adjacent, what is the best way to find out the value, i think it would fall under commercial?

Is there an agricultural newspaper in your state? If so, I read that for a couple of weeks to see how well agriculture is doing, and also check out their classifieds for farm land for sale.