Dr. Nguyen Hue is a professor of Environmental Soil Chemistry at the University of Hawaii. His areas of expertise include soil chemistry with particular interest in organic matter management (e.g., composting, agricultural use of animal manure and biosolids), organicv farming, and in monitoring of environmental pollution, especially arsenic chemistry. He also studies soil acidity, Aluminum and Manganese chemistries, organic soil amendments and plant nutrition with focus on nutritional requirements of vegetables and tree crops.