Plenary Papers.- Why Evaluate Soil Organic Matter Models?.- The Contribution of the Soil Organic Matter Network (SOMNET) to GCTE.- Why Site Networks?.- The North American Site Network.- The Australian Site Network.- Long-term Data Sets from Germany and Eastern Europe.- Establishing a European GCTE Soil Organic Matter Network (SOMNET).- Interpretation Difficulties with Long-Term Experiments.- Review and Classification of Ten Soil Organic Matter (SOM) Models.- Ecosystem Model Comparisons: Science or Fantasy World?.- Matching Measurable Soil Organic Matter Fractions with Conceptual Pools in Simulation Models of Carbon Turnover: Revision of Model Structure.- Modeling the Measurable or Measuring the Modelable: A Hierarchical Approach to Isolating Meaningful Soil Organic Matter Fractionations.- Quantitative Methods to Evaluate and Compare Soil Organic Matter (SOM) Models.- Soil Organic Matter Models and Global Estimates of Soil Organic Carbon.- Soil Organic Matter Models.- The Soil Submodel of the ITE (Edinburgh) Forest and Hurley Pasture Models.- SOMM - a Model of Soil Organic Matter and Nitrogen Dynamics in Terrestrial Ecosystems.- RothC-26.3 - A Model For the Turnover of Carbon in Soil.- Modelling Approaches of Soil Organic Matter Turnover Within the CANDY System.- Organic Matter Dynamics Simulated with the ‘Verberne’-Model.- The DNDC Model.- Description of the Model NCSOIL.- Simulating Soil Carbon and Nitrogen Dynamics with the Soil-Plant-Atmosphere System Model DAISY.- The CENTURY Model.- Long-Term Experiments with Soil Organic Matter Measurements.- Soil Organic Matter Dynamics in Sanborn Field (North America).- The Askov Long-Term Experiments on Animal Manure and Mineral Fertilizers.- The Tamworth Legume/Cereal Rotation.- Long-Term Fertilization Trials in Hungary.-Essai Permanent Plots, Gembloux.- The Waite Permanent Rotation Trial..- Woodslee Tile Runoff Experiment: Fertilization Effects on Soil Organic Matter.- Effect of Farm Yard Manure and Fertilizer Nitrogen in Pearl Millet-Wheat Cropping Sequence.- The Breton Classical Plots.- Long-Term Field Experiment Praha- Ruzyn?, Czech Republic.- The Static Experiment Bad Lauchstädt, Germany.- The Park Grass Experiment, 1856–1995.- Geescroft Wilderness, 1883–1995.- Long-Term Residue Management Experiment: Pendleton, Oregon, USA.- Carbon Changes During the Growth of Loblolly Pine on Formerly Cultivated Soil: The Calhoun Experimental Forest, USA.- Soil Organic Matter Dynamics in the North American Corn Belt: The Arlington Plots.- Soil Evolution Under Dry Meadows in a Boreal Climate: The Moscow Dry-Meadow Experimental Site.
