Chapter 9 Food How Humans Impact Land Farming. Starvation Lack of calories/ people usually die from...
-
Upload
melanie-horton -
Category
Documents
-
view
218 -
download
1
Transcript of Chapter 9 Food How Humans Impact Land Farming. Starvation Lack of calories/ people usually die from...
- Slide 1
- Chapter 9 Food How Humans Impact Land Farming
- Slide 2
- 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
- Slide 3
- 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
- Slide 4
- Agriculture and Soil Chapter 9.2 Describe fertile soil Describe methods to prevent soil erosion Describe desertification Compare low input and conventional farming
- Slide 5
- 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
- Slide 6
- 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
- Slide 7
- 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
- Slide 8
- The Dust Bowl
- Slide 9
- 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
- Slide 10
- 2. No-till farming- seeds of new crop are planted into slits cut into previous crop
- Slide 11
- 3. Crop rotation-growing different kinds of crops in succession on the same land
- Slide 12
- 4. Biological Pest Control also called Integrated Pest Management (IPM)- control pests with beneficial insects