What is silt soil? In gardening circles, silt rarely receives the credit it deserves. Yet, soil components vary in how well they drain or hold water, and in their ability to retain nutrients. Identifying silt and understanding its value in the soil are important aspects of gardening. Silt Definition Silt is defined by its particle size. At a diameter between .002 and .05 mm, silt falls into the second smallest grain size in the particle grade scale, with clay being the smallest and boulders the largest.Silt is formed when larger rocks, particularly quartz and feldspar, are eroded by wind and water. Glaciers, flowing water, and wind grind these eroded rock particles against each other or other objects in the landscape to form this dust-like material. Properties of Silt Silt is a component of soil, as are clay and sand. Silt particle size lies between that of clay (less than .002 […]
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