  A Higgs boson in the intermediate mass range is considered. An effective
Lagrangian approach is used in order to evaluate the top-induced QCD
corrections of order $\alpha_s^3$ to the decay into light quarks and
$O(\alpha_s^4)$ corrections to the gluonic decay mode. The connection to the
decoupling relations for $\alpha_s$ and the light quark masses is discussed.
