cloning while still on the plant

wats the technique where u dont seperated the scion from the stock and just stick the tip down and bury it??
also,i use air layering with fruit trees;do people do this with cannabis or is it too labor intensive??

I'm sure it can be done. Based on what I know about cannabis, I really don't see why it wouldn't be viable. Google the piss out of the subject until you have definitive results. If you know how to air layer, than growing pot should be a walk in the park for you.

Just read about layering (and grafting if you want to be cool).