Soil Air


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.

Drop the clods gently, and watch the bubbles.	Air will bubble from some clods for up to 20 minutes or more.

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.