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This paper describes Century Soil Organic Matter (SOM) Model simulations of seven long-term data sets that are the subject of this special issue. We found that Century successfully simulates SOM C across a variety of land use and climate types. Simulations of SOM were most successful in grass and crop systems. This exercise highlights a structural limitation of Century in simulating SOM in a forest...
Models are used increasingly to predict long-term changes in soil organic matter (SOM). Comparison with measured data is clearly desirable. We compared simulations of the mechanistic ITE (Edinburgh) Forest (EF) and Hurley Pasture (HP) ecosystem models with experimental SOM data from three long-term experiments: a 30 year old pine forest in South Carolina, USA, a 100 year old area of naturally regenerating...
CANDY (CArbon and Nitrogen DYnamics) is a simulation system based on long-term experiments of organic matter turnover and nitrogen dynamics at Bad Lauchstadt, Germany. Key driving variables are soil physical properties, meteorological data and management information. The main application of the CANDY model is the calculation of short-term dynamics of nitrogen transformation and long-term dynamics...
DAISY, a mechanistic model for the simulation of crop production, soil water and N dynamics in agro-ecosystems, was used for simulating trends in total soil carbon (C) for various long-term experiments as part of a model evaluation exercise. Of the seven core datasets in the global SOMNET database, DAISY could be applied to the four arable sites and, with certain critical assumptions, to the single...
As part of a model evaluation exercise, RothC-26.3, a model for the turnover of organic carbon in non-waterlogged soils, was fitted to measurements of organic carbon from 18 different experimental treatments on 6 long-term experimental sites in Germany, England, the USA, the Czech Republic and Australia. In the fitting process, the model was first run with an annual return of plant C that had been...
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