Here is the link to managing ponds in Tenn. a good basic publication.

http://www.state.tn.us/twra/fish/pond/ponds.pdf

Call your county agent and ask about a soil test for your dirt (from the pond bottom) and a water test. He should be able to provide info but tell him it is for pond mamagement purposes.

Good advice above but it can only be as good as the info available. In order to derermine how to approach the status of the fish population you need to provide sizes/age/types and # of fish already there. Look at pages 27-31 of link about pond assessment and balance; the chart on what you see will give you and idea of the process.