Table 9. General Features of Silvicultural Systems1

  Matrix
Northern General Forest Management Area		 Matrix
Southern General
Forest Management
Area		 Adaptive
Management
Areas2		 Reserves
(Late-Successional,
Riparian		 Other
Allocation In general Connectivity/
Diversity
Blocks 		Frosts, pyroclastic
soils3, visuals		        
Silvicultural
System		 Modified
Even-Aged		 Modified
Even-Aged		 Shelterwood
Retention 		Structural
Retention		 Structural
Retention		 Consistent
with objectives		 Consistent
with objectives
Features:              
Target stand Large tree
retention		 Large tree
retention		 Large tree
retention		 Minimum
ecological
old growth		 Varied Ecological
old growth 		Varied
Target landscape Mix of stand
and seral
conditions		 Connectivity
within
allocation		 Mix of stand
and seral
conditions		 General
connectivity		 General
connectivity		 Functional
arrangement		 Varied
Harvest constraints Reforestation Landscape
arrangement 		Frost, soils,
visuals 		Reforestation,
enhanced stand
vigor 		Reforestation
enhanced stand
vigor 		N/A N/A
Size of regeneration
patch cuts		 N/A N/A N/A < 5 acres Variable N/A N/A
Trees left/arrangement
in regeneration
harvest units		 6-8 trees/
acre, scattered
or grouped		 12-18 trees/
acre, scattered
or grouped		 12-25 trees/
acre then 6-8
acre, scattered
or grouped		 16-25 trees/
acre scattered
or grouped		 16-25 trees/
acre scattered
or grouped		 N/A N/A
Size of
retained trees		 20" + 20" + 20" + Variable Variable N/A N/A
Snag retention 40% habitat 40% habitat 40% habitat 40% habitat 40% habitat As determined
by subsequent
analysis		 Consistent with
objectives
Coarse woody
debris		 120 linear feet of material > 16 inches in diameter
and 16 feet long		 As determined
by subsequent
analysis		 Consistent with
objectives
Minimum regeneration
harvests (years)		 100 100 100 120 None N/A N/A
Interval between
regeneration
harvests (years)		 100 150
(area control)		 100 120 120 N/A N/A
Provision for
salvage		 yes yes yes yes yes yes Consistent
with objectives
1Future targets may vary based on the results of watershed analysis.
2Silvicultural system is generally expected to be one of structural retention. Management is expected to be similar to that of the southern GFMA. However, systems and practices as well as the resulting stands and landscape may vary to meet the objectives of the Adaptive Management Area. There are no specific standards and guidelines for snag and green-tree retention and coarse woody debris in the AMA, however, the intent of the Matrix standards and guidelines for these structures must be met.
3Granitics and schist soils would be managed under structural retention guidelines (southern GFMA).