Measuring soil moisture (IMAGE) DOE/Los Alamos National Laboratory Caption A researcher measures the soil moisture of maize plants in a growth chamber at Los Alamos National Laboratory. Part of a study creating soil microbiomes to improve crop drought tolerance, the research addresses one of the top 100 questions identified by an international panel in plant science: How does the plant microbiome affect stress tolerance? These questions are aimed at the greatest challenges facing humanity. Credit Los Alamos National Laboratory Usage Restrictions No restrictions. License Public Domain 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.