1. SUSTAINABLE FOOD PRODUCTION
© 2016 Paul Billiet ODWS

2. World population 2015…
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3. …and in 2050
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4. Global food production
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DAVID TILMAN Proc. Natl. Acad. Sci. USA Vol. 96, pp. 5995–6000, May 1999

5. Can we keep this up?
© 2016 Paul Billiet ODWS
© P Billiet

6. The challenges The food gap Land use and biodiversity
Crop and pasture yield
Climate change
Fisheries.
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7. Can agriculture respond?
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© P Billiet

8. Feed Conversion Ratio (FCR)
The efficiency at converting feed mass into product
Cattle: Between 5:1 (on concentrates) and 20:1 (on rangeland)
Pigs: 3.0 to 3.2:1
Sheep: 4-6:1
Poultry: 2:1
Crickets: 1.7:1
Meal worms: 2.2:1
Fish: :1
Rabbits: :1
© 2016 Paul Billiet ODWS

9. But is this realistic? Catfish aquaculture Feed 5925kg Fish 2783 kg
FCR = 2.1:1
But only the flesh is eaten
Catfish fillets 384kg
FCR = 16.6:1
© 2016 Paul Billiet ODWS

10. But is this realistic? Soybean production (US) for concentrates
Energy cost
Input (labour, fuel, fertilizer, pesticides, transport) kJ ha-1
Output (grain harvest) kJ ha-1
© 2016 Paul Billiet ODWS

11. Beef FCR FCR Concentrates 5:1 Rangeland 20:1 Fossil fuel consumption
Rangeland kJ ha-1
Concentrates kJ ha-1
© 2016 Paul Billiet ODWS