Plant Science

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Plant Science

• Chapter 1

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Civilization

• In the beginning, Nomads followed herds of
  animals and gathered food. When they discovered
  that they could seed grain and harvest it, they
  no longer needed to follow a food source. This
  allowed people to live in one place, thus the
  beginning of civilization.

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Origin of Grain

• Wheat Egypt, Iran, Turkey
• Corn Mexico
• Explorers would bring wheat to North America, and
  return with corn.

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Plants as a Food Factory

• Green plants are the only living things capable
  of Photosynthesis (using energy from sun to make
  sugar)

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How will we provide food for a growing planet?

• ?????

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World population

• 1978 4 billion
• population growns 200,000/day
• 60-80 of deaths in world are from undernutrition
  or malnutrition
• average person needs 2200 Kilocalories per day
• half the world recieves less than 1500
  Kilocalories

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Balanced diet

• meat and cereals
• North America 35 meat, 40 cerial, 25
  fruits/veg
• Asia 10 meat, 75 cereal (rice)

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How can we produce more food?

• increase number of acres in production
• 3 million acres per year taken out of production
  in the U.S. for residential and commercial use
• increase production per acre
• (Japan, Canada, Deserts, Jungles)

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How has production changed in America?

• Civil War 1 farmer produced enough food for his
  family (16)
• 1920 110
• 1970 150
• 1990 1 70
• 1998 1128
• Corn production per acre doubled from 1940 to
  1960 (hybrid corn fertilizer)
• Research colleges, USDA, Industry

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