Agricultural landscapes must provide food, fiber and energy to

a growing population in a changing climate, while potentially

serving as instruments for climate change mitigation. Agriculture

is the backbone of the Kenyan economy, contributing approximately

25% of the GDP annually and employing more than 75%

of the population (The Government of Kenya 2010). The development

of agriculture is also important for poverty reduction since

most of the vulnerable groups, like pastoralists, the landless, and

Using family balance (i.e., combined net farm and non-farm incomes less family expenses), an output from an integrated model, which couples water resource, agronomic and socio-economic models, its sensitivity and uncertainty are evaluated for five smallholder farming groups (AeE) in the Olifants Basin. The crop management practiced included conventional rainfed, untied ridges, planting basins and supplemental irrigation.