Understanding Western Soils

This series provides guidance on how to sample soil for analysis and includes visualizations related to soil properties and water infiltration. Concepts such as particle size, soil water-holding capacity, runoff, leaching, sodium adsorption ratio, sodic soils, and saturated paste are explored. Short video demonstrations assist with teaching or learning. The series focuses on arid soils, such as those found in the American West.

Properties of Soil Animations

Soil particle size

Understanding the Sodium Adsorption Ratio (SAR)
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Olsen test for Phosphorus

The Olsen Test for Phosphorus:.
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Unavailability of Water in Saline Soils

Unavailability of Water in Saline Soils:.
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Properties of Soil

Particle size

Particle size
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Gypsum and sodic soils

Gypsum and sodic soils
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Dispersion and flocculation

Dispersion and flocculation
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Soil Sampling

soil sampling

Getting Started
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Probe versus shovel

Probe versus shovel:
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Random sampling a small field with hammer probe

Random sampling a small field with hammer probe
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Random sampling across a large field with hammer probe

Random sampling across a large field with hammer probe
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Soil variability

Soil variability
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Infiltration and Runoff

Water infiltration

Water infiltration
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Ground cover

Ground cover
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Runoff and Infiltration

Runoff and Infiltration
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Surface cover and runoff

Surface cover and runoff
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© 2017 New Mexico State University Board of Regents. This material is based upon work that is supported by the National Institute of Food and Agriculture, U.S. Department of Agriculture, under award number 2014-38640-22175 through the Western Sustainable Agriculture Research and Education program under project number EW15-011.