  Neutron rich Zr nuclei with number of neutrons between $N$= 50 and 82 are
investigated in the relativistic mean field approach in co-ordinate space. The
resonant levels in the positive energy continuum have been explicitly included
in the calculation. Odd nuclei have been treated in the blocking approximation.
Our calculation indicates that the dripline for odd mass isotopes is far away
from that for the even mass ones. Pairing interaction plays a significant role
in stabilizing the even isotopes, thus extending the dripline for them.
