Most of Albemarle county is piedmont red clay. Very fertile, but heavy. Going east in Fluvanna, you find a shale soil ( Sassafras) that need pretty heavy amendments.

I'm sorry I haven't been back to respond. Long story...car accident, holidays, buying a house. I'll be at Lake Monticello and that sounds like the heavy amendment area. I'll come prepared to work. :)

You could always do what we do and use raised beds. We use the Square Foot Gardening method and it's pretty darned foolproof!