photo 1 (IMAGE) Helmholtz Centre for Environmental Research - UFZ Caption GCEF experimental plot (conventional farming). PBSA samples were placed in the middle of the plot. Credit ©Purahong, UFZ Usage Restrictions please note copyright License Original 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.