  We consider the supersymmetric Calogero-Sutherland type N-particle problems
in one dimension and show that the corresponding fermionic part can be
identified with the generalized X-Y models in the presence of an inhomogeneous
magnetic field. In particular we show that the generalized Haldane-Shastry
models (with magnetic field) are themselves the fermionic partners of the
Calogero-Sutherland type models. Several such models are discussed and a recipe
is given for constructing spin models and finding their ground state energy
from the corresponding N-particle problems.
