  We demonstrate the new class of variance reduction techniques for hadron
propagator and nucleon isovector form factor in the realistic lattice of
$N_f=2+1$ domain-wall fermion. All-mode averaging (AMA) is one of the powerful
tools to reduce the statistical noise effectively for wider varieties of
observables compared to existing techniques such as low-mode averaging (LMA).
We adopt this technique to hadron two-point functions and three-point
functions, and compare with LMA and traditional source-shift method in the same
ensembles. We observe AMA is much more cost effective in reducing statistical
error for these observables.
