AAP: The federal government begins a process to buy $50 million worth of water from irrigators in south-east Australia on Wednesday. The move is part of the $10 billion national water plan aimed at reviving the parched Murray-Darling Basin. Federal Water Minister Penny Wong said the public tender process allowed irrigators who wished to sell their water entitlements to submit offers at a fair market price. She said the water would be used to preserve the environmental assets …