If you are going to do farm appraisals, study those soil types. You'll know what slopes they are; you'll get to where you can almost guess the soil type of a particular farm just by looking and knowing the area.
I get the county soils books. Many counties have them on CD now. The soil associations and types are coded so ToA means Taloka and "A" means its level. B some sloped and C, D, steeper steeper.
In the book you will find charts giving you the soils properties and its suitability. Particularly important in some areas. The Jay and Taloka soils in our area drains poorly and often has a perched water table. Septic systems in these soils types frequently are required to be gravel bed systems or alternative systems whereas a soil like Captina might be suited for a regular septic system. They are usually free and you can pick them up at the county USDA office (sometimes a USDA office covers more than one county) and they usually have flood maps to look at too. It the Natural Resources suboffice.
Thanks, SharperImage, it looks like an interesting site. Like others, I currently use the USDA Soil Survey books. I can see, however, the product of this site will be valued addition.
Jersey Joe