  We discuss the effects of local structure on the electrical transport and
magnetic properties of La(0.67)Ca(0.33)Mn(1-x)Ti(x)O(3) system.Based on the
intercomparison of the structure, transport and magnetic properties of the Mn
site substituted La(0.67)Ca(0.33)MnO(3) with isovalent diamagnetic and
paramagnetic ions, we argue that local structural effects have a decisive role
to play, compared to the local spin coupling effects, in the
ferromagnetic-metallic ground state of the CMR manganites
