You will need: 4. SOIL PROFILE HORIZONS • O Horizon — organic layer of leaves, roots, and decaying material • A Horizon — Topsoil • B Horizon — Subsoil • C Horizon — Substratum • R Horizon — Bedrock or solid rock below the C Horizon Animal, Plant, and Soil Science Lesson Plan Library Unit C. Problem Area 6. Soil Texture (sand, silt, and clay) – USDA-NRCS K-12 Lessons A flow chart to identify soil texture (from the texture triangle) by feel, using a soil sample and water. Place spoons with each of the soil horizon/layer ingredients. This is future soil. Figure 1: A typical soil profile O Horizon: (1st layer) This is the top layer of soil. Put a spoonful of candy-coated chocolates into the bottom of an individual cup; discuss what Parent Material is. A soil profile is the layers of soil on the top of the Earth that are called O, A, B, C and R horizons. Soil Origin and Development - Nancy Williams - 11/8/01. Introduction to the Soil Purpose Through this hands on lesson, students will understand the soil horizons and determine their properties. It naturally forms horizons, or layers of soil. Physical Properties of Soil - Nancy Williams - 11/8/01. Soil Water (PDF; 1.0 MB) - Demonstrate how water either enters the soil or runs off over the soil surface (from the Soil Quality Team).. Demonstrate making the soil horizons of your edible soil. The Color of Soil. Soil Glue (PDF; 2.9 MB) - Demonstrate how surface soil particles are held together by various organic substances (from the Soil Quality Team).. Water Quality and Concerns- Travis Kersten - 11/24/01. The color varies from brown to black. Page 10. Brent Niemeyer Series 2/8/02 6. Profiling soil isn’t the most colorful or exciting activity, but creating an edible representation of all the layers sure can be! 5. Grade Three: Curriculum Connections: Soils in the Environment. Lesson 5. Soil and Plants - Nancy Williams - 11/8/01. Even though it looks like a big bunch of brown stuff on the ground, soil is actually quite organized. A soil profile comprises 5 major soil horizons (i.e., layers). Students will complete this by using a note taking device, exit slip, reading When a vertical section of these many horizons is taken, its known as a soil profile. Erosion, deposition, and other processes might also affect the way a soil profile looks at a particular location. They will also explain the difference between a soil profile, horizon, and layer. Lesson Plans. Dressing a Poinsettia - Diane Rundee 12/01. Soil Crayons. soil: "A living, dynamic system at the interface between air and rock. Soil Color Lesson and Activity - Developed by SSSA, this lesson and activity introduces the concept of soil colors and contains an activity on making Soil Crayons (from USDA). They are the O, A, B, C and R horizons. Painting With Soil. soil profile: a vertical view of the soil that displays the divided layers or horizons soil horizon: a layer of soil that forms from physical, chemical, and biological properties resulting from soil forming processes. reason soil horizons are different as you dig deeper is because of mixing of organic material in the upper horizons and weathering and leaching in the lower horizons. Repeat this procedure with the pudding (Subsoil), followed by cookie Turf Grass - Reynold Gardner - Junction City, OR 12/01. Lesson Plan – A Soil Profile. It is made of fresh to partially decomposed organic matter. Each layer is distinguishable by certain characteristics. If you’re in a forest, a garden, or other natural system that’s not a dry desert, you’ll generally see organic material like leaves on the ground. These horizons run parallel to the ground and serve up distinct characteristics that aid the layers above and below. 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