My husband and I have planted more than our share of trees in the soil of Chesapeake Country. We are not arborists by any means, but we have always wanted to plant trees. A cottage in Shady Side gave us opportunity, inspiration and a flat former cornfield, altitude eight feet, just a few hundred feet from the West River.     Over the past 12 years, we have dug wide holes in the yellow clay and put in probably 120 trees. At least half have died, due to drought, deer damage or our...