Multiplicities and minijets at the Tevatron

We show that the KNO scaling violation in the parton branching model is due to the increase of the gluon contribution to the hadronic multiplicities. This results in the widening of the probability distribution in agreement with experimental data. We also find excellent agreement with experimental data on multiplicity moments in different rapidity regions. We present theoretical predictions for the multiplicities and moments at the Tevatron energies. We also show that QCD minijet cross section with p_T^min of order 3 GeV and K factor of order 2 gives a very good description of the minijet data. We extrapolate our theoretical predictions to Tevatron energies indicating that measurements of the minijet production at these energies will have some resolving power to distinguish between different sets of structure functions.