  We investigate the potential of 3 kiloTon-years(kTy) of KamLAND data to
further constrain the $\Delta m^2$ and $\tan^2\theta$ values compared to those
presently allowed by existing KamLAND and global solar data. We study the
extent, dependence and characteristics of this sensitivity in and around the
two parts of the LMA region that are currently allowed. Our analysis with 3 kTy
simulated spectra shows that KamLAND spectrum data by itself can constrain
$\Delta m^2$ with high precision. Combining the spectrum with global solar data
further tightens the constraints on allowed values of $\tan^2\theta$ and
$\Delta m^2$. We also study the effects of future neutral current data with a
total error of 7% from the Sudbury Neutrino Observatory. We find that these
future measurements offer the potential of considerable precision in
determining the oscillation parameters (specially the mass parameter).
