[Silvicultural Systems Guidebook Table of Contents]
ISIS/MLSIS decision sequence for silvicultural system classification
Is the intent to maintain one or two distinct well-represented age classes?
Yes go to even-aged systems
No go to uneven-aged systems
Is the intent to leave trees on the block to provide seed or shelter for the new crop?
Is the cutblock greater than 1 ha and greater than two tree-lengths wide?
Yes the system is: Clearcut (CLEARCT)
Is the cutblock less than 1 hectare in size?
Yes the system is: Patch cut (PATCHCT)
Is the intent to leave trees on the block at the establishment cut phase, for seed but not
for shelter, for new regeneration?
Yes the system is: Seed tree (SEEDTR)
Is the intent to leave trees on the block at the establishment cut phase, for both shelter and
possibly seed, for establishment of new regeneration?
Yes the system is: Shelterwood (SHELTER)
Is the intent to achieve regeneration through vegetative suckering or sprouting?
Yes the system is: Coppice (COPPICE)
Other even-aged treatments
Is the intent to commercially thin or harvest poles (e.g., cedar)?
Yes the system (for administrative purposes) is: Intermediate cut (IMCUT)
Is the intent to create a management unit that will have three or more age classes?
Yes the system is: Selection (SELECT)
Note: If trees are left for objectives other than regeneration, the system will be classified with
the modifier with reserves. For identification of more complex variants of these major
silvicultural systems, refer to theConcepts and Terminology section of this guidebook.