Table 1.

Average N balances in selected countries in sub-Saharan Africa in 2000 Negative values (kg N ha^–1 year^–1) refer to N depletion (adapted from Chianu et al. (2012))

Country	N balance(kg N ha–1 year–1)
Botswana	–2
Mali	–11
Benin	–16
Senegal	–16
Cameroon	–21
Zimbabwe	–27
Tanzania	–32
Nigeria	–37
Kenya	–46
Ethiopia	–47
Rwanda	–60
Malawi	–67