We consider a version of the non-linear Schr\"odinger equation with M bosons
and N fermions. We first solve the classical and quantum versions of this
equation, using a super-Zamolodchikov-Faddeev (ZF) algebra. Then we prove that
the hierarchy associated to this model admits a super-Yangian Y(gl(M|N))
symmetry. We exhibit the corresponding (classical and quantum) Lax pairs.
Finally, we construct explicitly the super-Yangian generators, in terms of the
canonical fields on the one hand, and in terms of the ZF algebra generators on
the other hand. The latter construction uses the well-bred operators introduced
recently.