At Korhogo (Ivory Coast)
animal power enables farmers to farm fields 3 times as big, and to harvest 3 times as much on the same area. The harvest is 9 times as big.
At Darou (Senegal)
with animal power fields twice as big were farmed, and the farmers earned twice as much.
At Banfora (Upper Volta)
with animal power one man can farm more than 2 hectares instead of 1 hectare.
At Ouaka (Central African Empire)
the production of cotton per family is: 157 kilogrammes without animal power, 473 kilogrammes with animal power.