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The soil textural triangle is used to identify soil texture types. The proportions of particle types are found by suspending a sample in water (put soil and water in a jar and shake it), allowing the components to settle (this can take up to 24 hours), and then measuring the layers formed.
The Soil Textural Triangle Calculator is designed to determine the composition of soil based on its sand, silt, and clay percentages.
This is a Microsoft Excel Macro-enabled spreadsheet to develop total sand, silt, and clay low, representative, and high values based on known textures which can be further refined using sand, silt, and clay limits. It uses an interactive texture triangle with textures that toggle on and off.
Soil texture is a classification instrument used both in the field and laboratory to determine soil classes based on their physical texture. Soil texture can be determined using qualitative methods such as texture by feel, and quantitative methods such as the hydrometer method based on Stokes' law.
Soil texture, determined by the proportions of sand, silt, and clay, plays a crucial role in plant growth. The soil texture triangle helps categorize soil into 12 types based on these proportions. Understanding soil texture can guide optimal plant selection for different soil types.
Soil Texture. Soil texture refers to the relative proportion of sand, silt and clay size particles in a sample of soil. Clay size particles are the smallest being less than .002 mm in size. Silt is a medium size particle falling between .002 and .05 mm in size.
Awpearce's interactive graph and data of "Interactive Soil Texture Triangle" is a scatter3d, showing Clay, Clay Loam, Loam, Loamy Sand, Sand, Sandy Clay, Sandy Clay Loam, Sandy Loam, Silt, Silt Loam, Silty Clay, Silty Clay Loam.
Use a textural triangle to determine the textural class of a soil. Understand the relationship between particle size and specific surface area. Soil texture and structure are considered “master variables”, meaning that texture and structure directly influence a large number of other soil properties.
clay percentages of a soil are known, the textural class can be read from the textural triangle (Figure 1). For example, a soil with 40% sand, 40% silt and 20% clay would be classified as a loam. Figure 1: A soil textural triangle is used to determine soil textural class from the percentages of sand, silt, and clay in the soil.
Soil textural triangle and textural classes (image from USDA-NRCS). The three sides of the textural triangle represent increasing or decreasing percentages of sand, silt and clay particles. The textural triangle is easy to use once it is understood.