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