Fig. 7.

Farmers’ adoption of manure composting in Lushoto. The diagram shows the timeline of surveys from registered farmers in the first bar on the left (blue). Bars two and three show results from the first survey round, and bars four and five show results from the second survey round. At the end of each survey round (bars three and five), farmers are grouped based on their responses. The groups, in turn, determine the set of questions for the next survey round (see question tree in Fig. 3). Sankey diagram created with d3.js Sankey diagram http://bost.ocks.org/mike/sankey/. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)