China's push to add by subtracting fertilizer.
Hvistendahl
Mara
M
D017954:Africa South of the Sahara; D000383:Agriculture / Q000379:methods*; D002681:China; D018556:Crops, Agricultural / Q000254:growth & development*; D005308:Fertilizers / Q000706:statistics & numerical data*
D005308:Fertilizers