Junjian Zhang and social network analysts (IMAGE) University of Sydney Caption Junjian Zhang led the social network survey in the field and collected data from over 120 farmers. Credit Junjian Zhang, University of Sydney Usage Restrictions Please credit photo author. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.