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Colloids and Other Exchange Mechanisms
4:56
What is pH?
24:35
Soil Acidity
12:57
If you're ambitious but lazy, please watch this video...
15:37
Basic Clay Mineralogy
17:56
Soil Aeration
21:11
Saline and Sodic Soils
14:03
Soil Temperature
10:06
Plant Water Uptake and the Soil-Plant-Atmosphere Continuum