Soil Erosion Video Eric Angat Teacher Soil scientists

Soil Erosion Video Eric Angat Teacher

Soil scientists divide the soil into layers from the surface down to the underlying bedrock. This is called a soil profile. The layers in a soil profile are known as horizons. The depth of each horizon varies among different types of soil.

Topsoil is the upper, outermost layer of soil, usually the top 2 inches (5. 1 cm) to 8 inches (20 cm). It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs.

Soil Erosion 1. 2. 3. 4. Where is soil erosion happening? Who practice soil conservation? How do farmers practice soil conservation? Draw, label, and describe the soil box with three compartments. 5. Explain why the third compartment has the highest degree of soil erosion.

Fibrous roots have extensive root systems that hold and binds soil firmly preventing soil erosion.

Soil Erosion https: //www. youtube. com/watch? v=_Ue. Vv. Uzg. JAY

Copy and Answer the following Questions in your notebook. 1. Where is soil erosion happening? Soil erosion is happening everywhere. 2. Who practice soil conservation? Farmers practice soil conservation. We also need to practice soil conservation.

Copy and Answer the following Questions in your notebook. 3. How do farmers practice soil conservation? Planting grass filter strips, using plant residues, and no till or plowing etc. 4. Draw, label, and describe the soil box with three compartments. You just need to draw in the boxes of your worksheet what you watched.

Copy and Answer the following Questions in your notebook. 5. Explain why the third compartment has the highest degree of soil erosion. Because the soil is bare and has no protection from erosion.

Agriculture 6. What is the disadvantage of plowing or soil tilling? 7. What are the alternatives for soil tilling or plowing? 8. What are the benefits of no till or minimum till? 9. Why are farm residues (stem and leaves of crops) left on farm lands? 10. Why is soil erosion considered as major problem in farming?

Soil Plowing an agricultural process used for cutting, lifting, and loosening the soil. • Benefits – Roots need oxygen for cell respiration and the correct amount of water to nourish the plant. Plowing nurtures the soil by providing aeration and improving drainage.

Soil Plowing

Overgrazing Too many grazing animals degrades pasture, leading to exposure of the bare soil surface and ultimately erosion and even desertification of the area followed by wind/water erosion. What grass plants need is sufficient recovery time between bites.

Overgrazing

Agriculture https: //www. youtube. com/watch? v=dn. Npx. LYUwpc

Copy and Answer the following Questions in your notebook. 6. What is the disadvantage of plowing or soil tilling? Soil plowing loosens the soil that makes it prone to water and wind erosion. 7. What are the alternatives for soil tilling or plowing? Using crop residues, genetically modified plants, and minimum till.

Copy and Answer the following Questions in your notebook. 8. What are the benefits of no till or minimum till? It minimizes erosion and saves fuel. 9. Why are farm residues (stem and leaves of crops) left on farm lands? To prevent erosion and to fertilize the soil.

Copy and Answer the following Questions in your notebook. 10. Why is soil erosion considered as major problem in farming? Soil erosion washes away the topsoil that is considered the most nutritious part of the soil.

Green Economy 11. What do we need to do to safeguard the future of our world? 12. Who are the key to the Green Economy? Why? 13. What is agriculture? Think! 14. Why do we need more food as years go by? 15. How can we help farmers produce more food? 16. How do plants help lower air pollution and prevent soil degradation? Think!

Green Economy https: //www. youtube. com/watch? v=tw. Gev 010 Zwc

Copy and Answer the following Questions in your notebook. 11. What do we need to do to safeguard the future of our world? Protect the soil so that we can feed the growing population of our planet. 12. Who are the key to the Green Economy? Why? Farmers and of course all of us.

Copy and Answer the following Questions in your notebook. 13. What is agriculture? Think! The use of land for growing plants and animals. 14. Why do we need more food as years go by? Because human population is rapidly increasing.

Copy and Answer the following Questions in your notebook. 15. How can we help farmers produce more food? Support scientific research, education, and sustainable agriculture. 16. How do plants help lower air pollution and prevent soil degradation? Think! Plants uses carbon dioxide that lessens the greenhouse gases in the atmosphere. Also, plants prevent soil erosion.

17. Watch and Read: What erosion prevention technique was used in building the Banaue Rice terraces in the Philippines? How does this technique prevent soil erosion? https: //www. youtube. com/watch? v=Lb 2 sds. HUCLQ

Terracing and Contour plowing • Prevents or slows down erosion by slowing down run- off. Run-off is water flowing on a slope. Fast run-off=great erosion

Slump Erosion- large segment of land moves.

Erosion on a slope Loose and uncovered soil is prone to erosion. Slump

What is the Great Sphinx? The Great Sphinx is a large human-headed lion that was carved from a mound of natural rock. It is located in Giza where it guards the front of Khafra's pyramid. Many of the detailed features of the Sphinx were lost because of weathering and erosion by wind.

18. Which is more likely to prevent mass-movement events? A. constructing buildings in stream drainage paths B. clear-cutting trees from the side of a mountain C. paving roads next to sloping hills D. contour plowing of crop areas

Asphalt and concrete road prevent the percolation of water to the soil. Accumulation of runoff This leads to more run-off that leads to erosion and flooding.

Cemented path Spaced tiles Grass lawn Which of the following will permit the greatest percolation and least runoff?

19. How does the replacement of large land areas with concrete and asphalt affect the land? A. It changes the bedrock of underlying layers of soil. B. It prevents the dynamics of the rock cycle. C. It increases the amount of groundwater in porous rock. D. It increases erosion of sediments by increasing runoff.

Soil Mulch

Soil mulch 1. to conserve moisture 2. to improve the fertility and health of the soil 3. to reduce weed growth 4. Prevent soil erosion Soil matting 1. to conserve moisture 2. to reduce weed growth 3. prevent soil erosion

Soil Much • Prevent soil erosion • Makes soil fertile. • Prevent weeds from growing.

20. How is Soil Mulching done?

21. How is erosion prevented?

Adding rocks, sediments, and plants. stabilized shoreline

Establishing and Managing Riparian Forest Buffers

22. From a scientific perspective, which of the following sequences of action is the best way to solve the problem of wetland erosion? A. add sediments, plantings, monitor plantings B. dredging, sand bags, plantings C. dredging, hard stabilization, plantings D. hard stabilization, sediment transport, pesticide treatment

23. Cracks in rocks widen as water in them freezes and thaws. How does this affect the surface of the Earth? A. It reduces the rates of soil formation. B. It changes the chemical composition of the rocks. C. It exposes rocks to increased rates of erosion and weathering. D. It limits the exposure of rocks to acid precipitation.

24. Which is a farming technique that could improve the soil and the environment? A. using fueled machines that will turn the soil continuously B. placing inorganic chemical fertilizers in the soil C. creating undisturbed layers of mulch in the soil D. irrigating the soil with salty water

25. List 5 ways on how to lessen soil erosion. Think! no till or minimum till Leave farm residues (stem and leaves of crops) left on farm lands or use soil mulch. Terracing and Contour farming. Planting grass, shrubs, and trees. Stabilizing shorelines and protecting Riperian buffers.

Preventing Coastal Erosion