Fig. 4.

Crop yield improvements at different locations, ranging from conservation agriculture (CA), ex-situ water harvesting systems (WH) and watershed development programmes (WSD), (i.e., programmes that combine conservation agriculture with supplementary irrigation). Sources: Conservation Agriculture: Rockström et al. (2009d). Water harvesting systems: Syria, Oweis (1997); Kenya, Barron and Okwach (2005); Burkina Faso, Fox and Rockström (2003). Watershed development programmes (one example): Wani et al. (2008). Prec. = precipitation