2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/7112A variety of processes play a role in the evolution of protostellar disks. Here I focus on the uncertain issue of magnetic field-disk coupling and its implications for magnetically-driven turbulence and disk-driven winds. At present it is clear that the magnetic field plays a crucial role in disk evolution, but detailed conclusions cannot be drawn because the complicated interplay between dynamics and the evolution of the grain population remains to be explored.8 pages, LaTeX, newpasp.sty. To appear in the proceedings of IAU Symp 221, Star Formation at High Angular Resolution, eds. M. G. Burton, R. Jayawardhana & T. L. Bourke (ASP)Astrophysicstext