  Single Spin Asymmetries (SSA) $A_N$ measured in the two reactions at the
Protvino 70 GeV accelerator are presented. $A_N$ in the reaction
$p+p(pol)->\pi^0+X$ in the central region is close to zero within the error
bars. SSA in the reaction $\pi^- +p(pol)->\pi^0+X$ in the polarized target
fragmentation region is equal to $(-15 \pm 4)%$ at $|x_F|>0.4$. There is an
indication that the asymmetry arises at the same pion energy in the center of
mass system.
