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Analysis Sheet for Trophic Ecology of Humans

Category
Daily Consumption

(kcal/day)
Yearly Consumption

(kcal/year)
Yield

(kcal/sq m/year)
Required to Support You
(Yearly 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

Category
Daily Consumption

(kcal/day)
Yearly Consumption

(kcal/year)
Yield

(kcal/sq m/year)
Required to Support You
(Yearly Consumption ÷ Yield)
Cane sugar   
3500
 
Soft drinks   
3500
 
Corn cereal   
1600
 
Corn   
250
 
Sub-total

Animal Products

Category
Daily Consumption

(kcal/day)
Yearly Consumption

(kcal/year)
Yield

(kcal/sq m/year)
Required to Support You
(Yearly Consumption ÷ Yield)
Milk   
420
 
Cheeses    
40
 
Eggs    
200
 
Chicken    
190
 
Pork    
190
 
Beef    
130
 
Fish (frozen)   
2
 
Sub-total

T O T A L

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


Modified from materials presented by Janis Lariviere at the Woodrow Wilson NFF Biology Institute, 1991. Modified by David Masterman, 1996


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