Can Marijuana be laced with DMT?

Yes, marijuana can be laced with DMT. DMT can be made stable in a powdered form, at which point you can put it into a marijuana cigarette or whatever you use to get high.

HOWEVER...

The effects of DMT are so much stronger than the effects of marijuana that you wouldn't even notice the pot. DMT is an extremely potent drug. Marijuana CAN be laced with DMT, but it is an unnecessary and wasteful practice.