WATER， AIR & SOIL POLLUTION 1998 Vol.105 No.1/2

1. Integrated Assessment of Soil Chemical Status，.1. Integration of　　　　 　 Existing Models and Derivation of a Regional Database for Switzerland ∥ 　 M. ALVETEG.-p1 2. Integrated Assessment of Soil Chemical Sta-tus.2.Application of a　　　 　 Regionalized Model to 622 Forested Sites in Switzerland∥D.KURZ.-p11 3. MAGIC， SAFE and SMART Model Applications at Integrated Monitoring　　　 　 Sites: Effects Emission Reduction Scenarios∥M.FORSIUS.-p21 4. Predicting Freshwater Critical Loads of Acidification at the　 Catchment 　 Scale: An Empirical Model∥M.R.KERNAN.-p31 5. Evidence of Current Soil Acidification in Spruce Stands in the Vosges　 　 Mountains， North-eastern France∥E.DAMBRINE.-p43 6. A Comparison of Soil Sensitiv-ity to Acidification Based on Laboratory- 　 determined Short-term Acid Buffering Capacity and the Skokloster　　　　 　 Classification∥M.E.HODSON.-p53 7. Proton Budgets of Forest Ecosystems on Volcanogenous Regosols in　　　　 　 Hokkkaido， Northern Japan∥H.SHIBATA.-p63 8. GIS Analysis of Surface Water Chemistry Susceptibility and Response to　 　 ∥O.RIGINA.-p73 9. Effects of Atmospheric Sea-Salt Depo-sition on Soils and Freshwaters　in 　 Northeast Scotland∥C.C.WHITE.-p83 10.Acidification of Freshwater Wetlands: Combined Effects of Non-airborne　 　 Sulfur Pollution and Desiccation∥L.P.M.LAMERS.-p95 11.Trace Gas Emissions from a North Wales Fen- Role of Hydrochemistry and　 　 Soil Enzyme Activity∥H.KANG.-p107 12.Estimating Rainy Season Nitrous Oxide and Methane Fluxes Across Forest　 　 and Pasture Landscapes in Costa Rica∥W.A.REINERS.-p117 13.GIS-based Extrapolation of Land Use-Related Nitrous Oxide Flux in the　 　 Atlantic Zone of Costa Ricas∥R.A.J.PLANT.-p131 14.Synthesis of Nitrogen Pools and Fluxes from European Forest Ecosystems ∥ 　 N.B.DISE.-p143 15.The Behavior of Nitrogen lsotopes in Acidified Forest Soils in The　　　 　 Czech Republic∥F.BUZEK.-p155 16.Canopy and Soil Retention of Nitrogen Deposition in a Mixed Boreal　　　 　 Forest in Eastern Finland∥S.PIRAINEN.-p165 17.Effects of Chronic Nitrogen Amendments on Production of Dissolved　　　 　 Organic Carbon and Nitrogen in Forest Soils∥W.H.MCDOWELL.-p175 18.Effect of Chronic Nitrogen Additions on Soil Nitrogen Fractions in Red　 　 Spruce Stands∥M.D.DAVID.-p183 19.An Empirical Approach for Assessing the Relationship Between Nitrogen　 　 Deposition and Nitrate Leaching From Upland Catchments in the United　　 　 Kingdom Using Runoff Chemistry∥R.M.HARRIMAN.-p193 20.The Prediction fo Nitrate Leaching with the First-order Acidity　Balance 　 (FAB) Model for Upland Catchment in Great Britain∥C.J.CURTIS.-p205 21.Nitrogen and Sulfate Export from High Elevation Catchments of the　　　 　 Sierra Nevada， California∥J.O.SICKMAN.-p217 22.Links Between Runoff Generation， Climate adn Nitrate-N Leaching from　　 　 Forested Catchments∥L.ANDERSSON.-p227 23