Significant 8147 hectare exclusion fenced property Mount Lonsdale has sold after auction for $20 million.

A Senate Inquiry will scrutinise a controversial trial proposing to store waste carbon dioxide in the Great Artesian Basin by mining giant Glencore.

Prime breeding and backgrounding property Croydon Park is estimated to carry 600 breeders or 900 adult cattle equivalents.

The security of the supply of CO2 for Australian food industries is under question.