Release Notes

 

MGM18 (VS1.0.18.37 / Rev6115)

First major release of MGM18. Download available June 30, 2019 to July 11, 2019.

New Features:

  1. New climate-sensitive survival functions for white spruce, black spruce, lodgepole pine, jack pine, trembling aspen, balsam poplar, and balsam fir (Cortini et al. 2017).
  2. New height increment and diameter increment functions for jack pine (Strimbu et al. 2017) and black spruce (Oboite 2018).
  3. The full implementation of the GYPSY / Huang et al. (2009) site index curves for Alberta.
  4. The retirement of the Huang (1997) and Huang et al. (1997) site index curves for Alberta.
  5. The deactivation of the “stand breakup” Mortality Adjustment (i.e. “MAFlag”).
  6. An interim update to the juvenile Treelist Generator (Trees < 25 years).
  7. A streamlined crop plan “Options Event” (i.e. fewer user “flags”).
  8. An executable installation package and updated installation procedure.
  9. An installed Excel “AddIn” that significantly improves model performance.
  10. Digital certificates for the installation package and Excel “AddIn” to enhance security.

 

MGM18 (VS1.1.18.37 / Rev6115)

Minor update. Includes all of the features in MGM18 (VS1.0.18.37 / Rev6115). Download available July 15, 2019 to April 26, 2021.

Updates:

  1. Update to integrate the jack pine diameter increment function (Strimbu et al. 2017) with the GYPSY / Huang et al. (2009) site index curves.
  2. Update to address how pine competition is passed to the survival functions (Cortini et al. 2017) and black spruce growth functions (Oboite 2018).
  3. Update to address how black spruce competition is passed to the jack pine growth functions (Strimbu et al. 2017).

 

MGM21 (VS8.2.21.39 / Rev6378)

Beta release of MGM21 that is under consideration for use in Forest Management Planning in Alberta. MGM21 is a major update from MGM18 (VS1.1.18.37 / Rev6115). Download available April 27, 2021 to present.

New Features:

  1. A climate and composition sensitive maximum size-density function for trees ≥ 4cm DBH (Comeau 2021b).
  2. An updated self-thinning system for trees ≥ 4cm DBH.
  3. Revised survival functions for balsam fir, jack pine, lodgepole pine, and black spruce without a tagging limit variable (Comeau 2021a).
  4. Updated height increment and diameter increment functions for black spruce (Oboite and Comeau 2021).
  5. Added white spruce competition to the height increment and diameter increment functions for juvenile white spruce < 4cm DBH (Comeau and Bokalo 2020).
  6. Updated site index functions for Saskatchewan, Manitoba, and northeastern British Columbia.
  7. A routine that estimates missing tree ages within MGM (i.e. Internal Age Solver).
  8. Improved tree age estimates on regenerated trees.
  9. A modified approach to estimate tree age for white spruce.
  10. The updating of tree age estimates after stand establishment or thinning.
  11. Updated diameter estimates in MGM’s Tree List Generator for untended deciduous trees.
  12. Streamlined crop plans with fewer inputs.
  13. Faster runtimes when using large Stand Workbooks.
  14. 32-bit support for Microsoft Office 2016, Microsoft Office 2019, and local installations of Microsoft Office 365.
  15. 64-bit support for Microsoft Office 2019 and local installations of Microsoft Office 365.

 

Last Modified: May 12, 2021