The world will need to raise its food production by 60 to 70% to feed more than 9,000,000,000 people by 2050.
The amount by which irrigation typically improves farm yields: double
Average number of hectares of cultivated land needed to feed one person in 1961: 0.45 hectares
Average number of hectares of cultivated land needed to feed one person in 2006: 0.22 hectares
Post-harvest grain losses in Sub-Saharan Africa are estimated at $4 billion a year. This could feed 48,000,000 people people.
Only four crops—rice, wheat, maize, and potatoes—provide more than 60% of human energy needs.
Courtesy Food and Agriculture Organization of the United Nations.