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Land How do we use it?
<ul><li>1.  timber for paper, furniture, and home construction </li></ul>Usefulness of non-urban lands
<ul><li>2.  rich grassland to support livestock & farms </li></ul>Usefulness of non-urban lands
<ul><li>3.  mineral resources to make everything (from electronics to engine power, etc.) </li></ul>Usefulness of non-urba...
<ul><li>worldwide avg.:  1,800 cubic cm. of wood per person each day. </li></ul>Harvesting Trees
<ul><li>We use 3.5 times the average in the US. </li></ul><ul><li>Each year, one person cuts down a 30 m tall tree. </li><...
<ul><li>clearing trees from an area without replacing them. </li></ul>Deforestation
<ul><li>process of removing all trees from an area  </li></ul>Clear-cutting
Disadvantage: <ul><li>destroys wildlife, </li></ul><ul><li>increases soil  </li></ul><ul><li>erosion; diminishes </li></ul...
Advantage: <ul><li>least expensive, fewer roads needed. </li></ul>
<ul><li>cutting only middle-aged or mature trees </li></ul>Selective Cutting
Disadvantage: <ul><li>expensive; more roads cause more soil erosion. </li></ul>
Advantage: <ul><li>less impact on environment than clear-cutting </li></ul>
<ul><li>Process of replacing trees that have died or been cut down. </li></ul>Reforestation
<ul><li>Rangeland  - essential for maintaining the world’s food supply. </li></ul>Ranching
Problems <ul><li>a.  overgrazing  - dry patches left or unwanted plants take over. </li></ul><ul><li>b.  desertification <...
<ul><li>Public Rangelands Improvement Act of 1978 </li></ul>Maintaining the Range
<ul><li>grazing management :  </li></ul><ul><li>a. limits animal herds to sizes land can support </li></ul>
<ul><li>b. move herds in a way that will protect the plants that support them. </li></ul>Maintaining the Range
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Use land Forest's

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Transcript of "Use land Forest's"

  1. 1. Land How do we use it?
  2. 2. <ul><li>1. timber for paper, furniture, and home construction </li></ul>Usefulness of non-urban lands
  3. 3. <ul><li>2. rich grassland to support livestock & farms </li></ul>Usefulness of non-urban lands
  4. 4. <ul><li>3. mineral resources to make everything (from electronics to engine power, etc.) </li></ul>Usefulness of non-urban lands
  5. 5. <ul><li>worldwide avg.: 1,800 cubic cm. of wood per person each day. </li></ul>Harvesting Trees
  6. 6. <ul><li>We use 3.5 times the average in the US. </li></ul><ul><li>Each year, one person cuts down a 30 m tall tree. </li></ul>Harvesting Trees WHAT??
  7. 7. <ul><li>clearing trees from an area without replacing them. </li></ul>Deforestation
  8. 8. <ul><li>process of removing all trees from an area </li></ul>Clear-cutting
  9. 9. Disadvantage: <ul><li>destroys wildlife, </li></ul><ul><li>increases soil </li></ul><ul><li>erosion; diminishes </li></ul><ul><li>beauty </li></ul>X
  10. 10. Advantage: <ul><li>least expensive, fewer roads needed. </li></ul>
  11. 11. <ul><li>cutting only middle-aged or mature trees </li></ul>Selective Cutting
  12. 12. Disadvantage: <ul><li>expensive; more roads cause more soil erosion. </li></ul>
  13. 13. Advantage: <ul><li>less impact on environment than clear-cutting </li></ul>
  14. 14. <ul><li>Process of replacing trees that have died or been cut down. </li></ul>Reforestation
  15. 15. <ul><li>Rangeland - essential for maintaining the world’s food supply. </li></ul>Ranching
  16. 16. Problems <ul><li>a. overgrazing - dry patches left or unwanted plants take over. </li></ul><ul><li>b. desertification </li></ul>
  17. 17. <ul><li>Public Rangelands Improvement Act of 1978 </li></ul>Maintaining the Range
  18. 18. <ul><li>grazing management : </li></ul><ul><li>a. limits animal herds to sizes land can support </li></ul>
  19. 19. <ul><li>b. move herds in a way that will protect the plants that support them. </li></ul>Maintaining the Range
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