Changes in Sudan Gezira soil under irrigation

Abstract

The effect of different amounts of irrigation water on the salts in Gezira soil has been studied by comparison of different rotations in two long-term experiments at the Gezira Research Farm. The conclusion is drawn that none of the rotations studied shows any evidence of salts rising or accumulating in the profile. There is some evidence of a removal of salts from a 6 ft. profile.

The Nile in the Sudan

“…The reference on p. 15 to Williams, 1966, inadvertently omitted from the very useful bibliography, relates to a note in which I expanded Tothill's (1946) hypothesis, later corroborated by Jewitt (1955), on the probable Blue Nile origin of much of the Gezira and suggested that 'at some time, after about 8000-12,000 BP, some 150 cm of clay were laid down over snail-bearing deposits of White Nile origin' (Williams, 1966, p. 271), which I tentatively correlated with Professor Berry's (1962) 382 m White Nile Lake. Sporadic dunes in the Gezira, mapped by Hunting Technical Services Limited from 1962 to 1964, are interpreted by the writers as partially reworked remnants of proto-Blue Nile distributaries (p. 4 and p. 6), a view with which I concur, although other explanations are possible (Williams, 1968a).…”