Chapter 9 Food How Humans Impact Land Farming. Starvation Lack of calories/ people usually die from...
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- Chapter 9 Food How Humans Impact Land Farming
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- Starvation Lack of calories/ people usually die from disease
Malnutrition Lack of an essential nutrient in diet such as protein
1 in 3 people in world are malnourished 20,000 people die every day
Why People Go Hungry
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- Why People Go Hungry? There is enough food for everyone in the
world but what is the problem? 1. Political troubles- civil war,
food stolen 2. Transportation- lack infrastructure or food
distribution network Roads and rail lines broken and need repair 3.
Droughts periods rainfall less than average 4. Famines food
shortage that lasts a long time and causes malnutrition in
people
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- Agriculture and Soil Chapter 9.2 Describe fertile soil Describe
methods to prevent soil erosion Describe desertification Compare
low input and conventional farming
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- Fertile soil- soil that can support rapid growth of healthy
plants Soil erosion- wearing away of topsoil by wind and water.
Desertification- fertile soil is lost and land becomes desert-like
Low in put farming- farming without a lot of energy, pesticides,
fertilizer, and water Conventional farming- farming with a lot of
energy, pesticides, fertilizer, and water
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- Conventional Not sustainable Uses lots of : Water Fuel
Pesticides Fertilizers Low Input Sustainable Uses less: Water Fuel
Pesticides Fertilizers Drip irrigation mulch pesticides Pivot
irrigation
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- Was there ever a time in U.S. when people were starving? Yes-
!930s Dust Bowl or Dirty Thirties Severe drought and windstorm
covered midwest states during 1930s Deep plowing of virgin topsoil
of Great Plains Removed native, deep-rooted grasses that trapped
soil No plants covering ground plus a major drought and windstorm
http://www.history.com/topics/dust-bowl
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- The Dust Bowl
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- After the Dust Bowl Began age of modern farming Methods to
prevent erosion and conserve soil 1. contour plowing- plowing along
contour of land, across the slope
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- 2. No-till farming- seeds of new crop are planted into slits
cut into previous crop
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- 3. Crop rotation-growing different kinds of crops in succession
on the same land
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- 4. Biological Pest Control also called Integrated Pest
Management (IPM)- control pests with beneficial insects