This will be a regular volume in this series of critical review articles. They are: 1. Assessing and Managing Agricultural Nitrogen Losses to the Environment, by Smith, Schepers, and Porter. 2. Assessing and Modifying Ca and Al Levels in Acid Subsoils, by McCray and Sumner. 3. Applications of Electron Spin Resonance Spectroscopy in Soil Chemistry, by Senesi. 4. Microelectrophoresis Applied to the Surface Chemistry of Clay Minerals, by Harsh and Xu. 5. Applications of Luminescence Spectroscopy to Studies of Colloid-Solution Interfaces, by Traina.
Bobby Alton Stewart, Ph.D., is Distinguished Professor of Agriculture and Director of the Dryland Agriculture Institute at West Texas A&M University, Canyon, Texas. Prior to joining West Texas A&M University in 1993, he was with the USDA Agricultural Research Service in Oklahoma, Colorado, and Texas. He served as Director of the USDA Conservation and Production Laboratory at Bushland, Texas from 1968 to 1993.