What is a common T value, and what is meant by this term? Explain why certain soils have been assigned a higher T value than other soils. Why is the total annual rainfall in an area not a very good...

What is a common T value, and what is meant by this term? Explain why certain soils have been assigned a higher T value than other soils.

Why is the total annual rainfall in an area not a very good guide to the amount of erosion that will take place on a particular type of bare soil?