Analysis Sheet for Trophic Ecology of Humans

Food Category Your Daily Consumption
(kcal/day)
Your Annual Consumption
(kcal/year)
Yield
(kcal/sq m/year)
  m2 of land required to support you (consumption / yield)
C-3 Plants
Bread

650  
Wheat, cereal

810  
Oranges, grapefruit

1000  
Frozen orange juice

410  
Peanut butter

920  
Rice, rice cereal

1250  
Potatoes

1600  
Carrots

810  
Other vegetables

200  
Apples

1500  
Pears, peaches

900  
Vegetable oil

300  
Margarine

300  
Beet sugar

1990  
        Sub-total
C-4 Plants
Cane sugar

3500  
Soft drinks

3500  
Corn cereal

1600  
Corn

250  
        Sub-total
Animal Products
Milk

420  
Cheeses

40  
Eggs

200  
Chicken

190  
Pork

190  
Beef

130  
Fish (frozen)

2  
        Sub-total
        TOTAL

Source: Brewer, Richard and M. T. McCann, Laboratory and Field Manual of Ecology, Saunders College Publishing, Philadelphia, 1982.