Much of the plain is low, level land, covered with rich deposits of soils carried to the region by the Mississippi River and its tributaries.
(Much of the plain; is; low) (level land; covered; with rich deposits of soils) (soils; carried; to the region; by the Mississippi River and its tributaries)
Much of the plain level land soils
is covered carried
low
with rich deposits of soils
to the region by the Mississippi River and its tributaries