The Ganges Basin Development Challenge (GBDC) Program of the CGIAR Challenge Program for Water and Food is focusing on improving livelihoods and increasing productivity sustainably in the coastal polder zone, and has developed and tested innovative cropping systems and water management practices suited to the local conditions.Before a new cropping system can be recommended, it is important to identify its “extrapolation domain,” which determines where it could be successful.

The impacts of climate change exacerbate the myriad challenges faced by smallholder farmers in the Tropics. In many of these same regions, there is a lack of current, consistent, and spatially-explicit data, which severely limits the ability to locate smallholder communities, map their adaptive capacity, and target adaptation measures to these communities.

Generally discusses policy and institutional issues related to the topic in post-revolution Ethiopia. The first part of the paper summarizes the physical resource base and the farming systems of the central highlands. Part two highlights the performance of the livestock sector and provides a very brief picture of the institutions involved in livestock development in these institutions with particular reference to the dairy sector. The third part surveys livestock investments made available by government, non-government organizations and formal credit institutions.

The spatial distribution of crops and farming systems in Africa is determined by the duration of the period during which crop and livestock water requirements are met. The length of growing period (LGP) is normally assessed from weather station data—scarce in large parts of Africa—or coarse-resolution rainfall estimates derived from weather satellites. In this study, we analyzed LGP and its variability based on the 1981–2011 GIMMS NDVI3g dataset. We applied a variable threshold method in combination with a searching algorithm to determine start- and end-of-season.