PPT-Understanding Soil Texture and Structure

Soil Texture Soil Texture Fineness or coarseness of a soil What are the three soil particles Sand Silt Clay Soil Texture Why is soil texture important It affects Waterholding Capacity. The Topic For Today Is…. Soil. SOIL. Texture. Structure. BMPs. Soil Survey. Soil. Forming Factors. 200. 200. 200. 200. 200. 400. 400. 400. 400. 400. 600. 600. 600. 600. 600. 800. 800. 800. 800. 800. texturecourtesyNASA: (Getandsample)soilhorizonsmallthesprayLetthebetweenthemoisturethroughout.OncetheStepStep(TestIf the soil: handswhenrubbedandStep themediumribbon What are your thoughts on these pictures. Physical . Chemical. &. Properties of the soil. Soil. (1) Physical . Properties. This relates to the physical characteristics of the soil. . eg. Ooooh. ! Exciting . . Soil . Soil is from . parent . rock. It takes 200 years to form a layer of soil.... 1cm. thick!. . Soil forms distinct layers over time.. Layers can be distinguished by color, texture and composition. By choosing appropriate designs in clothing, people can make the most of their appearance. For job interviews and other special occasions, they can look their best and feel more comfortable. . Shape and Size. Department of Crop and Soil Sciences 1 Department of Crop and Soil Sciences 2 College of Agriculture and Life Sciences Texture should not be confused with structure Objective 5.02. Discuss the soil profile and soil sampling for surface and subsurface layers. What is the physical make up of soil?. Soil Profile. Layers of soil are called horizons. Typical profile in NC. Definitions. Soil Texture. The way a soil feels. A name given a textural group based on the relative proportions of each size of soil particle. Definitions. Aggregate. Mass or cluster of soil particles such as a clod, crumb or granule. Slope . Limits land use. Effects amount of water and the speed of water run off . Effects the degree of erosion . Measuring Slope . Is the rise or fall in land per 100’. Slope is always measured in %. A crash course in soils. Wednesday, November 5. Take out paper for Cornell notes! . And remember…. Red text on top = Header. Black text = notes for you to copy OR paraphrase/ summarize. Grey text = Liu’s talking points, no need to copy it down. Ooooh. ! Exciting . . Soil . Soil is from . parent . rock. It takes 200 years to form a layer of soil.... 1cm. thick!. . Soil forms distinct layers over time.. Layers can be distinguished by color, texture and composition. Introduction to Agriculture. Soil Science. Unit 2. Physical Properties. Physical properties or characteristics of the soil determine to a large degree how useable and productive soil will be. Productivity of soil is affected by the physical properties of soil. The delicacy of clay crystals. Soil crumb structure. Do not abuse clay!. Add plenty of organic matter. Avoid over-cultivation especially rotary cultivation. Use lime of gypsum to improve structure. Use green manure or mulch to cover the surface. Nathan Jones. MLRA Soil Survey Leader. Andy Oxford. Soil Scientist. January 2013. Objectives. Soil Horizons. Soil Color. Soil Texture. Soil Structure. Soil Rupture Resistance. Soil Roots and Pores. Soil Restrictive Layers.