Fig 5. Average yields, growth rates and variability changes of the four crops by income level and their uncertainty associated with different datasets and resolutions.

The income level categories in 2016 are based on those of the World Bank [35]. A box indicates the minimum-maximum range. The vertical solid line in the box indicates the average. Data at the finest (0.083°) and coarsest (2°) resolutions are presented to give a sense of which dataset or resolution is a main source of uncertainty.