Erratum

Following publication of the original article (Haile et al. 2016) it was brought to our attention that Fig. 1 was displaying incorrectly in the online version of the article due to additional shading. This has now been corrected on the BioMed Central website. Please find below a copy of the correct Fig. 1:

Fig. 1
figure 1

Acreage share of countries included in our forecasting tool