Yields of the main crops in most of the
rainfed and traditional irrigated farming
systems of the Nile Basin are still very
low – well below potential yields. Clearly
individual farmers, particularly those working
at the subsistence level, are unlikely to achieve
the yields obtainable under optimal field and
management conditions (Type II yield gaps).
However, this review of the 14 major farming
systems of the basin has uncovered a range
of common issues in each system which
currently limits productivity.