There are alot of factors that play into when you might want to use a specific turn style. It also depends on the specific radius you want/ are comfortable with using. Here are some examples of what I ride with different turning styles.
Narrow chute/blue-black terrain: short radius dynamic skidded
Wide open and groomed: standard carved turn, varying radius/dynamics for fun.
Off piste: aggressive medium to short radius dynamic turns.
Bumps: very dynamic carved if possible, although that depends on aggressiveness and bump type(icy/soft/smooth) and it ties into radius; all depending on comfort level.
I got alot more examples if you want, just name a terrain and I'll tell you the best ways I feel there are to have fun on it.
Generally, carving can be done just about anywhere, on all terrain (Unless you are doing true short radius dynamic turns, I've found you can't truly carve those) and it is generally the most effecient and smooth type of turn that get you the most out of your board and for your energy.
Dynamics can be introduced to all types of turns on all types of terrain, since it simply means you introduce seperation of the upper and lower body where you are actively pushing the board out from under you to decamber it and utilize the full energy to rebound you into the next turn (on a standard camber board.)
It all comes down to comfort level and personal preference in most cases. Although terrain can definitely decide as well.
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Last edited by NateGC; 08-04-2011 at 08:09 PM.