Soil Factors – FFA Land CDE

Soil Factors – FFA Land CDE

By Donald G. McGahan, Ph.D.
Revised: April 9, 2017

There really is no concrete right or wrong method to determine soil texture in the field. We use laboratory methods to “truth” ourselves as professionals.

The flow diagram in the Land Judging in Oklahoma manual is pretty good. I teach collegiate students at a different level and compare the FFA high school five (5) textural class determination to the three (3) class and twelve (12) class methods.

I have made the blog post comparing the three (3), five (5), and twelve (12) class methods available on this web log at

There really is little substitute for lots of practice.

Is technology building a better professor?

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