Extended Bergman projections from Lebesgue classes onto all
Besov spaces on the unit ball are defined and characterized.
Right inverses and adjoints of the projections share the
property that they are imbeddings of Besov spaces into
Lebesgue classes via certain combinations of radial
derivatives. Applications to the Gleason problem at arbitrary
points in the ball, duality, and complex interpolation in
Besov spaces are obtained. The results apply, in particular,
to the Hardy space $H^2$, the Arveson space, the Dirichlet
space, and the Bloch space.