News 2014-2015 Core Surveys Complete, 5th March 2015: By Matt Herring - Mar 5, 2015 0 3826 Share on Facebook Tweet on Twitter We have just completed our best sample yet: 2000 hectares of rice, with a minimum of two 1-hour morning/evening surveys at 80 sites on 41 randomly-selected rice farms in the Murrumbidgee and Coleambally Irrigation Areas. We have much analysis ahead.