Forest Investment Account

Abstract of FII Project R04-043

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Modelling the yield impact of variable retention harvesting, and the growth of aspen and birch

Author(s): Harper, George (BC Ministry of Forests)
Subject: Forestry, Silviculture/Forest Management Systems, Technology/GIS/Modeling/Remote Sensing, Wildlife
Series: Forest Investment Account (FIA) - Forest Science Program


We propose to expand the yield projection capabilities of the Tree and Stand Simulator (TASS) through the addition of the two broadleaf species, aspen and birch. We are also proposing to enhance TASS through the development of a variable retention harvesting simulation system. We plan to add these new features to TIPSY, which is widely distributed to forest practitioners. These additions will also position TASS and TIPSY software for future modeling of mixedwood and complex stand partial harvesting prescriptions and integration with other research into root disease and wildlife habitat. The expanded capabilities of our system of models will continue to provide new information in support of decisions related to silviculture prescriptions and timber supply planning.

For further information, please contact George Harper, BC Ministry of Forests - Research Branch (

Updated September 08, 2005 

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