Spruce and Tamarack regenerate well with full sunlight from seed.  A popular method of management is to clearcut swaths about 150-200 feett wide through the stand, leaving adjacent swaths 150-200 feet wide left uncut.  This is done perpendicular to the prevailing winds so the seeds from the remaining trees are blown into the clearcut area and germinate.

After adequate regeneration is realized in the clearcut strips, a second harvest is used to go back in and harvest the uncut swaths.

A variation to strip clearcuts is the "leave" tree method whereby a Forester will mark clumps of trees to be left uncut sporadically throughout the stand.  The seeds from those uncut trees are then blown into adjacent clearcut areas for germination.