Figures

Figure 1: Survey locations
[Figure 1 here]
Figure 2: Estimated AVCR over distribution of active carbon in sample
[Figure 2 here]
Note: Vertical red lines indicate 10% and 90thpercentiles of the distribution of POXC measures in the sample. AVCR estimates use AP estimates from the fixed effects model with N*POXC*log(rainfall) interaction (column 6 in table 2), and a farmgate maize-nitrogen price ratio of 0.15.
Figure 3: Estimated AVCR over distribution of seasonal rainfall in sample
[Figure 3 here]
Note: Vertical red lines indicate 10% and 90thpercentiles of the distribution of seasonal rainfall totals in the sample. AVCR estimates use AP estimates from the fixed effects model with N*POXC*log(rainfall) interaction (column 6 in table 2), and a farmgate maize-nitrogen price ratio of 0.15.