Average nitrogen levels in vineyard block (IMAGE) Rochester Institute of Technology Caption Imagery taken from a drone flight in early September maps the average nitrogen levels measured in composite leaf samples from 100 test vines in this one-acre vineyard block. The rows of vines here were grown with the goal of inducing different nutrient deficiencies for the team's experiment. Each deficiency sub-block consists of five rows separated by one buffer row as indicated on the map. The nitrogen and magnesium deficient sub-blocks each had relatively lower nitrogen levels as represented by the smaller circles. Credit Rob Chancia/RIT Usage Restrictions None 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.