Global Growing (IMAGE) Brown University Caption A map showing where farms are, whether they are on phosphorus fixing soil (purple) or not (green), and how intensive farming is there (darkness of pixel). Credit Roy <i>et. al</i>., <i>Nature Plants</i>. Usage Restrictions with credit 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.