Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain...
-
Upload
ruby-harrison -
Category
Documents
-
view
217 -
download
0
Transcript of Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain...
![Page 1: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/1.jpg)
Conserving Land and SoilSec. 4-1
![Page 2: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/2.jpg)
Objectives
E.4.1.1 Explain how people use land.
E.4.1.2 Describe the structure of fertile soil.
E.4.1.3 Identify problems that occur when soil is not properly managed.
![Page 3: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/3.jpg)
What are some things land is used for?
Agriculture-Growing food to feed the World population.
Mining-Extracting ores and fossil fuel from the ground.
Development-We need homes to live in and buildings to work and go to school in.
Recreation-People connect with nature as part of our natural evolution.
![Page 4: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/4.jpg)
Agriculture
Land is used to grow food for people and livestock to feed a growing population on Earth.
Without farming there would not be enough food and people would starve.
What else, besides land, do we use a lot of to grow food?
![Page 5: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/5.jpg)
Average Water Use 20th Century
What happened around the 1980’s to cause the graph to decline?
Efficiency
![Page 6: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/6.jpg)
Water
Rain does not provide anywhere near enough water to generate the amount of crops we need!
Where do we get water from?
Irrigation from surface and ground water.
![Page 7: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/7.jpg)
Water
Is this an efficient method of irrigation?
No
Why not? Where does most of the water go?
80%-85% evaporates and never makes it to the plants roots where it’s needed.
![Page 8: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/8.jpg)
Drip Irrigation
Hoses right on the ground deliver water directly to the roots of the plant. What does this help reduce?
Evaporation!
What does this do to water use efficiency?
Increases it from 15%-20% up to as much as 90% or more.
![Page 9: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/9.jpg)
Drip Irrigation
![Page 10: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/10.jpg)
Drip Irrigation
![Page 11: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/11.jpg)
Which Is More Efficient?
Drip Sprinkler
![Page 12: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/12.jpg)
Strip Mining
Earth is removed, the valuable material extracted and then the earthen material is replaced.
![Page 13: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/13.jpg)
Underground Mining
![Page 14: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/14.jpg)
Development
This Becomes This
![Page 15: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/15.jpg)
Or This
![Page 16: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/16.jpg)
Recreation
![Page 17: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/17.jpg)
What Land Uses Do You See?
![Page 18: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/18.jpg)
Soil Structure
How thick is the rich top layer of soil that supports life?
Not very!
The top layer contains all the richness needed to support plant life. What happens if that layer is lost?
The soil will no longer support plant life.
![Page 19: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/19.jpg)
Soil Profile
Look at the roots. Where are most of them?
In the top layer.
![Page 20: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/20.jpg)
Soil Management
Poor soil management can result in three problems:
Erosion
Nutrient depletion
Desertification
Fortunately, damaged soil can sometimes be restored.
![Page 21: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/21.jpg)
Erosion
Erosion is the wearing away of top layers of soil by water and wind.
![Page 22: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/22.jpg)
Rich Soil and Plants Can Reduce Erosion
![Page 23: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/23.jpg)
Terracing
![Page 24: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/24.jpg)
Soil Nutrient Depletion
![Page 25: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/25.jpg)
Soil Nutrient Depletion
![Page 26: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/26.jpg)
Desertification
When desert like conditions move into areas that were once fertile it’s called:
DESERTIFICATION
Why is this is a major problem?
Because it reduces the land area available for growing food.
![Page 27: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/27.jpg)
Land Reclamation
When nutrient rich topsoil is depleted or stripped off, then the area will lose its ability to grow plants and the area will essentially “die.”
Fortunately we are able to reclaim many of these areas by bringing in nutrient rich compost and plants.
![Page 28: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/28.jpg)
Compost
Compost is decomposed natural grass, leaves, wood, vegetables and manures that release their nutrients back into the soil so plants can start to grow again.
![Page 29: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/29.jpg)
Compost
This Turns Into This
![Page 30: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/30.jpg)
I Did This For 10 Years
![Page 31: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/31.jpg)
What Compost Can Do
Before After
![Page 32: Conserving Land and Soil Sec. 4-1. Objectives E.4.1.1 Explain how people use land. E.4.1.1 Explain how people use land. E.4.1.2 Describe the structure.](https://reader036.fdocuments.us/reader036/viewer/2022062517/56649ec95503460f94bd6765/html5/thumbnails/32.jpg)
Land Reclamation