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14sec3 Presentation Transcript

  • 1. 14.3 Modern Farming Techniques
  • 2. Historically…
    • Very labor intensive-done by humans and animals
    • Farmers grew a variety of crops
    • Rotated the crops; occassionally a field would lie fallow ( not be used) to restore fertility of the soil
  • 3. Industrialized Agriculture
    • Mid 20 th century
    • Farm machinery used- powered by fossil fuels
    • Highly efficient and productive
    • Each farmer can feed 78 people ( 1850- it was 5 people)
    • Requires large amounts of energy, pesticides, fertilizers
    • Large industrialized farms- run by corporations-agribusiness
    • Agribusiness can include growing, packaging and transport of food
  • 4. Problems…
    • Extensive use of pesticides has led to an increase in resistant strains of insects, and other pests ( 1992- CA white flies)
    • Monoculture farming- growing just one crop- hard on soil, all crops are identical and susceptible to same disease- crop can be wiped out if disease occurs
    • Newer variety of grains are high yielding but not necessarily adapted to local climates
    • Traditional varieties are now being studied again to serve as alternatives- quinoa was a staple of the Inca diet, high in protein, can be grown in mountains- being studied as a way to improve the diet of people in poor mountainous regions of the Himalayas, Southeast Asia, and Africa
  • 5. Dateline 1972
    • Farm Crisis in U.S.- read pg 233