Side note: When you get to the point of applying final ground cover, detail, ground swells, ditches, grade, roads, etc. should be pretty well done. Use of Plaster of Paris, drywall compound, floor leveling compound, etc can be use to a point, then a final coat of some earth colored paint gets you to applying grass, shrubs, weeds, etc. IMO, Mike CT.
Station, Feed store, Grain elevator Click on the link for a slideshow of preparation of an area before application of final ground cover.
