human activities affect soil n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Human Activities affect Soil PowerPoint Presentation
Download Presentation
Human Activities affect Soil

Loading in 2 Seconds...

  share
play fullscreen
1 / 18
jett

Human Activities affect Soil - PowerPoint PPT Presentation

223 Views
Download Presentation
Human Activities affect Soil
An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Human Activities affect Soil Soil is a resource that you can’t live without. Whether its supplying you with food, oxygen, or clean water. It sustains life!

  2. Human Activities affect Soil Activities that affect soil resources are: • Farming • Construction and development • Mining

  3. Human Activities affect Soil • Farming is how humans have received their food for over 10,000 years. • Farmers often add nutrients to their soils in the form or organic or artificial fertilizers to make crops grow better.

  4. Human Activities affect Soil • Over time farming practices can lead to the loss of soil. • Such as when farmers clear land • American farmers lose about 5 metric tons of soil for every ton of grain they produce.

  5. Human Activities affect Soil • Overgrazing can also occur, which is when farm animals eat large amounts of land cover. • Just like when farmers clear trees, this prevents the soil to wash or blow away. • This can cause desertification

  6. Human Activities affect Soil • To make various buildings and sites people need to dig up soil. • A lot of this can cause the soil to wash or be blown away which can cause rivers and lakes to become muddy.

  7. Human Activities affect Soil • The affects can lead to flooding or can fill up lakes and reservoirs.

  8. Human Activities affect Soil • Certain methods of mining can also cause soil loss.

  9. Human Activities affect Soil • Strip mining and open pit mining involves the removal of plants. • This can cause more exposure to air and water, which can speed up the process of chemical weathering

  10. Human Activities affect Soil • The speed up of chemical weathering can cause a type of pollution called acid drainage. • This acid can seep into the soil and be harmful to plants trying to grow.

  11. Human Activities affect Soil • Soil is so important to not only humans but the world. So its important that we conserve our soil.

  12. Human Activities affect Soil • There are 5 methods for soil conservation • Crop Rotation • Conservation Tillage • Terraces • Contour Plowing • Windbreaks

  13. Human Activities affect Soil • Crop Rotation is the practice of planting different crops on the same field in different years or growing seasons.

  14. Human Activities affect Soil • As you move your crops the harvest will remove different nutrients from the soil, thus not depleting the soil.

  15. Human Activities affect Soil • Conservation Tillage includes the way farmers limit the number of times fields are tilled or plowed in a year. • The less the soil is disturbed the less likely it will be blown or washed away.

  16. Human Activities affect Soil • Terracing are fields that are set up as flat step like areas built on a hillside to hold rainwater and prevent it from running downhill. • Crops are planted on the flat tops of the terraces.

  17. Human Activities affect Soil • Contour plowing is plowing on the curves of slopes. It helps so that rainwater does not run straight downhill.

  18. Human Activities affect Soil • Windbreaks are rows of trees planted between fields to “break” or reduce the number of force winds that can carry off soil.