At the other end of the spectrum, N use per hectare is below 25kg in a number of countries. Notably in a range of developing countries of sub-Saharan Africa, fertiliser use is known to be very low (Morris et al., The five largest fertiliser consumers (China, India, UNITED STATES, EU27, and Brazil) together account for 72% of the w orld’s total fertiliser consumption. Environmental and consumer safety concerns prevail in the majority of OECD countries.