By the 1950s only a small proportion of Upper Egypt had not been converted from basin (low transmission) to perennial (high transmission) irrigation.
Nyantos warsa 1950-an (siu sangang atus seketan) wantah akidik kepahan saking Mesir Hulu sané durung kagentosin saking irigasi cekungan (transmisi alit) manados irigasi abadi (transmisi ageng).