[en] Dynamics of the baryon number transport determine the mid-rapidity characteristics in nucleus-nucleus collisions: considerable net baryon densities at the AGS and SPS, and small but finite at RHIC. Fragmentations of incident baryons are used to describe the baryon number transport in nuclear collisions. We report results of leading proton, neutron and Lambda measurement in p+A collisions from E941 at the AGS. We discuss the impact of fragmentation schemes on baryon number transport and hyperon production in nuclear collisions. (author)