A consistent scheme to incorporate the semihard processes into Gribov-Regge models of hadronic interactions is proposed. Particle production during the soft preevolution, before the hard parton—parton scattering, is explicitely taken into account. Perturbative parton cascade is described on the basis of the unified evolution equation. The effect of the unitarization of the hard partonic scattering amplitude is discussed. Some consequences for Extensive Air Shower development and for EAS data analysis are considered.