FEDERAL LAND MANAGERS' AIR QUALITY RELATED VALUES WORKGROUP (FLAG)
PHASE I REPORT
Figure D-2. Trends in sulfate ion concentration, 1983-1994 (Lynch et al. 1996).
Figure D-3. Trends in nitrate ion concentration, 1983-1994 (Lynch et al. 1996).
Figure D-4. Trends in ammonium ion concentration, 1983-1994 (Lynch et al. 1996).