The process of baryon number transfer due to string junction propagation in
rapidity is considered. It has a significant effect in the net baryon
production in pp collisions at mid-rapidities and an even larger effect in
the forward hemisphere in the cases of πp and γp interactions. The
results of numerical calculations in the framework of the Quark-Gluon String
model are in reasonable agreement with the data.Comment: Latex, 17 figs. in ps files, 1 table. Submitted to EPJ C The title of
paper were changed, some proovings in the text, references and in figs were
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