Soil triangle diagram

Soil triangle diagram

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Credit: SHEILA TERRY/SCIENCE PHOTO LIBRARY

Caption: Soil triangle diagram. This diagram is used to work out the type of soil in an area. A sample of soil is left to settle in water. Larger particles settle out of suspension faster than smaller ones. Soil particles are placed in three categories depending on their size: sand (largest), silt and clay (smallest). Once the layers have settled, the depth of the layer is used to work out its percentage as a component of the soil. The three percentages are then read off the axes of the triangle: clay horizontally, silt towards bottom left and sand towards top left. Loams are the best soils for cultivation.

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Keywords: chart, clay, clayey, diagram, earth science, geographical, geography, geological, geology, loam, loamy, sand, sandy, silt, silty, soil triangle, textural, texture, type, types, typing

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