  We consider the low-energy effects of a selected set of Lorentz- and
CPT-violating quark and gluon operators by deriving the corresponding chiral
effective lagrangian. Using this effective lagrangian, low-energy hadronic
observables can be calculated. We apply this to magnetometer experiments and
derive the best bounds on some of the Lorentz-violating coefficients. We point
out that progress can be made by studying the nucleon-nucleon potential, and by
considering storage-ring experiments for deuterons and other light nuclei.
