Depending on how well the excavator leveled it you may need to smooth things out some more. A soil test and some lime and fertilizer will be in order, but on newly cleared land on soft and fluffy soils I like to get some seed in the ground asap to scavenge up nutrients before they get lost to the elements, even if i don't have time for a soil test. If it were mine I'd try to plant something before the next rain compacts the soil. Seed new plots on the heavy side, with a multiseed mix, that way if one seed type doesn't like your soil something else will. Buckwheat releases nutrients in newly cleared land. Rye oat and clover grows well in marginal soil. Brassicas loosen the dirt. In your area it's probably about the right time to get fall plots seeded. Good luck with this plot!