  The HIJING and VENUS models of relativistic hadron-nucleus and
nucleus-nucleus collisions are used to study interactions of hadron-hadron,
hadron-nitrogen and nucleus-nitrogen collisions, specific for the extensive air
shower developments initiated by cosmic rays in the atmosphere. The transverse
energy, transverse momenta and spectra of secondary particles as well as their
energy and mass dependence have been investigated in detail. Results are
presented with particular emphasis on the contributions of minijets in HIJING
model and validity of superposition models in this energy range.
