Laptop (IMAGE) American Society of Agronomy Caption The researchers use a series of instruments to obtain VisNIR spectra of contaminated soil. These include a spectrometer, contact probe, and puck with sample. Credit Nuwan Wijewardane Usage Restrictions For use with this 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.