posted 11 years ago
Just curious...how thick is your soil, or in other words, how deep to bedrock? My initial thought is the prevalence of basalt chunks means your topsoil is thin and the bedrock surface is not too far below. This could pose a challenge with regards to water retention in ponds or otherwise, because basalt bedrock is often highly fractured and those fractures drain water away. The prevalence of pines is also interesting. Pines typically thrive in dry, well drained soils. Have you completed any ponds yet? What are the retention characteristics? What I'm getting at is that the duff may not be the limiting factor, but the site geology.
Also, that duff probably serves as natural erosion control. You might find your swales filled with a whole lotta silt if you scraped the duff.