The CENTURY model is a general model of plant-soil nutrient cycling which is being used to simulate carbon and nutrient dynamics for different types of ecosystems including grasslands, agricultural lands, forests and savannas.

The CENTURY is composed of a soil organic matter/ decomposition submodel, a water budget submodel, a grassland/crop submodel, a forest production submodel, and management and events scheduling functions.

It computes the flow of carbon, nitrogen, phosphorus, and sulfur through the model's compartments. The minimum configuration of elements is C and N for all the model compartments. The organic matter structure for carbon(C), nitrogen(N), phosphorus(P) and sulfor(S) are identical; the inorganic components are computed for the specific inorganic compound.

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