| Date | Author | Description |
| 10 Jun 99 | Tom Hilinski | Draft version 1. |
| 16 Nov 99 | Tom Hilinski | Draft version 2. |
| May 2000 | Tom Hilinski | Draft version 3. Added the Font, Previous TOC topic, and Next TOC topic buttons to the Microsoft Windows HTML Help toolbar. Added most of the remaining Century 4 manual describing the Century model. Added the following pages: glossary; management events; site parameters (climate, soil, external nutrients, crop SOM, forest SOM, mineral NPS, soil water); model parameters (crop, cult, fert, fire, fix, graz, harv, omad, tree, trem); weather data file; Century error messages; site parameter editor; literature cited; units; limits. Reorganized the table of contents. Added an index to the Microsoft Windows HTML Help compiled help file. |
| June 2000 | Tom Hilinski | Draft version 4. Added more hypertext links to various sections. Added more description to the soil submodel. Added appendix for output variables. |
| Feb 2001 | Tom Hilinski | Draft version 5. Misc. editing. Updated description of erosion and deposition algorithms, and output variables. |
| March 2001 | Tom Hilinski | Draft version 6. Added pages for (1) the layered soil submodel, and (2) the submodel for the depth distribution of organic C. |
| November 2001 | Tom Hilinski | Draft version 7. Moved the page "Century Version 5 Release Notes" to the main level table of contents so it can easily be found. Misc. editing of several pages. Expanded the Running with Command-Line Options page. Updated the Specifying Preferences page to reflect the new command-line options. Updated the following pages: Crop and Grass Submodel, Nitrogen Submodel, Running the Century Simulation, Troubleshooting Your Simulation Configuration, Erosion File. Updated the version release notes. |
| December 2001 | Tom Hilinski | Draft version 8. Updated the following pages: Implementation of an Algorithm for a Layered Soil Submodel, Exponential Depth Distribution of Organic Carbon, Site Parameters for Soil and Physical Controls, Plant Production Submodels: Overview, Soil Organic Matter Submodel, Nitrogen Output Variables, Phosphorus Output Variables, Phosphorus Submodel, Sulfur Submodel, Sulfur Output Variables, Erosion File, Site Parameters for Initial Mineral N, P, and S. Updated the version release notes; the structure of the document has been enhanced to clarify information about changes to each release. |
| Dec 2002 | Tom Hilinski | Draft version 9. Updated pages for the N submodel, site parameters, "Units Used in Century", and "Running with Command-Line Options". Several other pages had minor changes. |
| July 2003 | Tom Hilinski | Updated and enhanced the description of the water submodel. |
| Nov 2004 | Tom Hilinski | Updated the following pages: Fixed Parameters, Grassland/Crop Submodel. |
| Jan 2005 | Tom Hilinski |
Added pages for DayCent5 site parameters:
Hydrology and Biophysical Controls;
Soil Temperature.
Modified pages: Editing Site Parameters, Site Parameters for Soil and Physical Controls. |
| Feb 2005 | Tom Hilinski | Modified pages: Running Century and CMI with Command-Line Options, Preparing for a Century Simulation, Editing Site Management, Editing Site Parameters. |
| April 2005 | Tom Hilinski | Modified pages: Nitrogen Submodel; Crop and Grassland Submodel; Forest Submodel; Fertilizer Additions; Nitrogen Output Variables; Water and Temperature Output Variables; Site Parameters for Soil and Physical Controls. |
| May-June 2005 | Tom Hilinski | Modified pages: Utilities for the Century5 Model; Crop and Grassland C Output Variables; Nitrogen Output Variables; Phosphorus Output Variables; Sulfur Output Variables; Fixed Parameters; Soil Organic Matter Submodel; Water Budget, Leaching and Soil Temperature; Fire; Running Century and CMI with Command-Line Options. |
| August 2005 | Tom Hilinski | Modified pages: Tree Removal Parameters ; Forest Submodel ; Fixed Parameters ; List of Figures . |
| October 2005 | Tom Hilinski |
Added pages:
Running a Century Simulation to Equilibrium;
Site Parameters Validation;
DayCent5
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