Insufficient scientific inputs in terms of research and development are responsible for
low productivity of rainfed systems in the semi-arid tropics (SAT), in addition to biophysical
and social constraints such as poor infrastructure, inherent low soil fertility,
frequent occurrence of drought, severe degradation of natural resource base, and poor
social and institutional networks (Wani et al., 2003, 2009). Researchers and development
workers apply high science tools mostly in well endowed areas.............
