USDA soil texture triangle.jpg
[[:w:User:Soil Physics
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USDA soil texture triangle, USDA Soil texture diagram.[
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USDA soil texture triangle, Soil texture triangle, Unknown date
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USDA土性三角形、USDA土性図。
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USDA土性三角形、土性三角形、未知時代
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soiling earthen roughness texture soil right triangle soil-building