This decision tree has been designed with the purpose of application with the Australian Soil Classification, which was created by R.F.Isbell. This work takes no credit for the creation of the classification system, it is simply a tool to be used to aid the process of classification. I recommend that any user has access to a copy of the book. Click here to order one online. I am using the 1st addition.
How the use the tool?
Read the questions in italics, than answer yes or no for the soil you are classifying.
Keep answering the questions until you get to a bold soil sub-order, of the soil you are classifying.
Sub-Order Decision Tree Tool
Does the soil have a peaty/humose/melacic/melanic horizon and a B/B2 <15% clay?
Yes, than it is Chernic
No,
Does the soil have a bleached A2 and a B/B2 with <15% Clay?
Yes, than it is Bleached-Orthic
No,
Does the B/B2 horizon have <15% Clay?
Yes, than it is Orthic
No,
Does the soil have a peaty/humose/melacic/melanic horizon and overlays hard unweathered rock?
Yes, than it is Chernic-Lepic
No,
Is the A2 horizon bleached and underlay hard unweathed rock?
Yes, than it is Bleached-Lepic
No, than it is Lepic
SoilSarah 