312 kilogram = 687.842 258 017 pound of grain produced per person 2005. 1.88 lb./day/person How
312 kilogram = 687.842 258 017 pound of grain produced per person 2005. 1.88 lb./day/person How many calories? 100 grams of rice 370 calories 100 grams equals .22 lbs 1682 calories per pd of brown rice or roughly 3162 per day in grain available (assuming all grain roughly same calories per pound as rice)
Source: Source WW Vital Signs 06-07 p. 23 [matthew double checked]