Soil Presentation
-
Upload
teacherandrew -
Category
Education
-
view
2.940 -
download
4
Transcript of Soil Presentation
![Page 1: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/1.jpg)
Soil Properties
Foundation Science 4 Class Code SC22102
![Page 2: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/2.jpg)
What is Soil made of?Soil is made of:1) mineral particles 2) organic matter 3) water 4) air
![Page 3: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/3.jpg)
When insects, worms, bacteria, and fungi and other organisms die they decay and form a material called “humus”.
As more organisms die, the soil becomes more fertile.
The Organic Matter in Soil is Mostly Humus
![Page 4: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/4.jpg)
Much of the life on earth depends on soil
Soil provides the nutrients needed by most plants to grow.
Why is Soil Important?
Soil is just as important as water, air, and sunlight.– Without soil, there would be no plants.– Without plants, there would be no food, shelter or
oxygen to breathe for humans or animals.
![Page 5: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/5.jpg)
How are Soils Formed?1. Decomposition –
animals and plants die and “feed” the soil
![Page 6: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/6.jpg)
How are Soils Formed?1. Decomposition2. Weathering (not
moving)– rain and wind break rocks down into soil
![Page 7: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/7.jpg)
How are Soils Formed?1. Decomposition2. Weathering3. Erosion (moving)–
when the rocks break and fall apart in the wind or rain
![Page 8: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/8.jpg)
Soil Profiles
• Soil forms in layers.• The set of layers is
called a profile.
![Page 9: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/9.jpg)
Soil Profiles
• Sometimes the layers are called horizons.
![Page 10: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/10.jpg)
Types of SoilThree Types:
1) Sandy soil contains large particles. Sandy soils stay loose and allow moisture to penetrate easily, but do not retain it for long term use.
2) Loam soil is a mix of sand, silt or clay, and organic matter. Loam soils are loose and look rich.
3) Clay soils are made of very small particles. They feel slick and sticky when wet.
![Page 11: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/11.jpg)
Clay Soil is Slippery and Holds Water Up
Remember, the particles in clay soil are very small
![Page 12: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/12.jpg)
Sandy Soil does NOT Hold Water
Sandy soil has large particles and holds air but not water
![Page 13: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/13.jpg)
Loam Soil holds both Air AND Water
Loam soil has both large and small particles and holds water and air well
![Page 14: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/14.jpg)
All Three Soils…
Clay SoilSandy Soil
Loam Soil
![Page 15: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/15.jpg)
What do Plants Need to Grow?1. Air2. Water3. Nutrients4. Sunlight
Soil responsible for these 3
So, if soil does not have a lot of air, plants won’t grow well.This is why clay soils are bad for plant growth.
If soil does not have a lot of water, plants won’t grow well.This is why sandy soils are bad for plant growth.
Loam soils can hold water and air, and are the best for plant growth.
![Page 16: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/16.jpg)
Types of Soil Video
![Page 17: Soil Presentation](https://reader031.fdocuments.in/reader031/viewer/2022012400/5557456cd8b42aa8378b4c3e/html5/thumbnails/17.jpg)
Questions1. What is soil made of?2. What is humus? 3. What are 2 reasons why soil is important?4. How are soils formed?5. What is a soil profile ?6. What are the 3 types of soil?7. Which soil is best for plant growth?8. What are the 4 things a plant needs to grow?9. A plant needs 4 things to grow, how many does it get from soil?10. Why are clay soils bad for plants to grow?11. What is sandy soil good at holding?12. What soil type is probably under this water?