Complex sentence: Most of the basin of the Warrego is too dry for cropping and has a very erratic rainfall of between, and covered with a natural vegetation of grassland of more fertile clay soils, and saltbush shrubland on less fertile red earths.
Split into simpler sentences: Most of the basin of the Warrego is too dry for cropping and has a very erratic rainfall of between. It is covered with a natural vegetation of grassland of more fertile clay soils, and saltbush shrubland on less fertile red earths.