  The bounds on the neutron electric dipole moment and T-odd nucleon-nucleon
interaction are used to extract the limits on the effective CP-odd four-fermion
operators containing strange quark field. This completes the study of the
dim=5,6 CP-odd operators built from the light-quark fields. The limits are very
strong and comparable to those obtained previously for operators containing up
and down flavors. We also analyze the shift of the axionic vacuum,
$\theta_{eff}$, induced by four-fermion operators in the presence of PQ
mechanism and conclude that this gives subleading contributions to CP-odd
observables as compared with the direct ones.
