Complex sentence: The land was developed and made suitable for seasonal crops and grazing stock, a tannery and flour mill were established at the Meredith River, and whaling stations were set up on nearby islands to enable the export of whale oil.
Split into simpler sentences: The land was developed and made suitable for seasonal crops and grazing stock and a tannery and flour mill were established at the Meredith River. Whaling stations were also set up on nearby islands to enable the export of whale oil.