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. Students will complete this by using a note taking device, exit slip, reading Page 10. Turf Grass - Reynold Gardner - Junction City, OR 12/01. 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. A soil profile is the layers of soil on the top of the Earth that are called O, A, B, C and R horizons. Physical Properties of Soil - 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 is made of fresh to partially decomposed organic matter. Each layer is distinguishable by certain characteristics. The Color of Soil. A soil profile comprises 5 major soil horizons (i.e., layers). 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).. This is future soil. They are the O, A, B, C and R horizons. They will also explain the difference between a soil profile, horizon, and layer. It naturally forms horizons, or layers of soil. 5. Soil Origin and Development - Nancy Williams - 11/8/01. Lesson Plan – A Soil Profile. 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. Dressing a Poinsettia - Diane Rundee 12/01. 4. 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). Profiling soil isn’t the most colorful or exciting activity, but creating an edible representation of all the layers sure can be! soil: "A living, dynamic system at the interface between air and rock. Even though it looks like a big bunch of brown stuff on the ground, soil is actually quite organized. Lesson 5. 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. 6. Put a spoonful of candy-coated chocolates into the bottom of an individual cup; discuss what Parent Material is. Figure 1: A typical soil profile O Horizon: (1st layer) This is the top layer of soil. Lesson Plans. These horizons run parallel to the ground and serve up distinct characteristics that aid the layers above and below. Painting With Soil. You will need: Water Quality and Concerns- Travis Kersten - 11/24/01. When a vertical section of these many horizons is taken, its known as a soil profile. Place spoons with each of the soil horizon/layer ingredients. The color varies from brown to black. 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. Demonstrate making the soil horizons of your edible soil. Soil Crayons. Repeat this procedure with the pudding (Subsoil), followed by cookie Grade Three: Curriculum Connections: Soils in the Environment. Soil Glue (PDF; 2.9 MB) - Demonstrate how surface soil particles are held together by various organic substances (from the Soil Quality Team).. Brent Niemeyer Series 2/8/02 Erosion, deposition, and other processes might also affect the way a soil profile looks at a particular location. Soil and Plants - Nancy Williams - 11/8/01. 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