Properties of Soil (3 videos)

Particle size

Particle size: The naked eye cannot see the spaces and different sized fractions that exist in soil. In this video, a glass jar, beads of various sizes, and a golf ball or two illuminate size fraction differences as well as air spaces and water.

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Dispersion and flocculation

Dispersion and flocculation: This demonstration shows the effect of calcium (from gypsum) on bringing dispersed soil particles together as aggregates to aid in reclaiming soils with high levels of sodium.

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Gypsum and sodic soils

Gypsum and sodic soils: Water movement through a sodium-affected soil is improved by the addition of calcium from gypsum. Water that is applied enters into the soil and continues to wet the profile in the presence of calcium.

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