  The method of electronic structure calculations for strongly correlated
disordered materials is developed employing the basic idea of coherent
potential approximation (CPA). Evolution of electronic structure and spin
magnetic moment value with concentration $x$ in strongly correlated
Ni$_{1-x}$Zn$_x$O solid solutions is investigated in the frame of this method.
The obtained values of energy gap and magnetic moment are in agreement with the
available experimental data.
