Technical reports published in JEQ are grouped by subject matter. These subject areas are periodically reviewed by the JEQ editorial board and are subject to change. The subject matter areas are: heavy metals in the environment, plant and environment interactions, organic compounds in the environment, surface water quality, ground water quality, ecosystem restoration, vadose zone transport processes and water quality, waste management, atmospheric pollutants and trace gases, landscape and watershed processes, wetlands and aquatic processes, biodegradation and bioremediation, ecological risk assessment. Contributions reporting original research or brief reviews and analyses dealing with some aspect of environmental quality in natural and agricultural ecosystems are accepted from all disciplines for consideration by the editorial board.