GPR in Field (IMAGE) American Society of Agronomy Caption Algeo stands on the left with a tablet while his advisor, Lee Slater, drags ground penetrating radar equipment over the soil's surface. Credit Chris Watts, Rothamsted Research. Usage Restrictions Please use with story only. 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.