Lesson Plans

Soil Air

photo of spray can and clods photo of clod in water
All it takes is a can of spray polyurethane and soil clods to demonstate soil air.

Spray the clod and wait a minute or two before dropping the clod in a jar of water.

photo of clod bubbling in water photo of more bubbles from clod in water
Drop the clods gently, and watch the bubbles.

Air will bubble from some clods for up to 20 minutes or more.

photo of clod with roots appearing photo of clod with fewer roots
Soil clods from surface soils from orchards, pastures, and lawns generally will have a high soil air content.

Soil clods from subsoils, or soils from conventionally cultivated fields will generally have lower soil air contents.

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