Brandon Smith (Redwoodtwig)
The soil factor
Up until 15 years ago, the forested areas were mostly kept mown and clear under the trees with brush hog, and I suspect 40 years ago with cows. And the fields mowed to maybe 2 inches. As a result, the organic layer in the forested areas is usually only about 15 years old and is deep only where obstructions to water flow has let it pile up.
The western half is more steeply sloped and will benefit from a bunch of short contour swales between and amongst the trees. Particularly some that cut across existing eroded areas.
The eastern half has mostly less than 3% slopes and the problem here is water not flowing, but sticking around and making a muddy mess, particularly around the south side of the house where enough rain will cause seepage into the basement.
The south side of the house would make a great location for a contour swale, but not at all sure I want to create a water lens underground that close to the house.