I am a first-time homeowner with a row-house in Brooklyn, NY. The house is a new construction and my backyard is now just dirt and rubble. The dirt is full of rocks, stones, pieces of brick and tile, chunks of concrete, and all sorts of other debris. How much of this stuff do I really need to clear out before I start improving the soil and planting things and what's the best way to go about doing it? My instinct is to clear out all but the smallest pieces and to use a combination of shovel, hoe, and rake to do this. Is that right?