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