The plain in between has a rich soil built up from centuries of winter run off and flooding from the Sacramento River.
(The plain in between; has; a rich soil built up from centuries of winter) (a rich soil; built up; T:from centuries of winter) (centuries of winter; run off; )
The plain in between a rich soil centuries of winter
has built up run off
a rich soil built up from centuries of winter
T:from centuries of winter