The *Australian Soil Classification Third Edition* by R. F. Isbell and the National Committee on Soil and Terrain provides a comprehensive guide to classifying Australian soils. The book, published by CSIRO Publishing in 2021, is 192 pages long and covers various aspects of soil classification, including key to soil orders, anthroposols, arenosols, calcarosols, chromosols, dermosols, ferrosols, hydrosols, kandosols, kurosols, organosols, podosols, rudosols, sodosols, tenosols, vertosols, and glossary terms. The classification system is designed to be general-purpose and hierarchical, with orders, suborders, great groups, subgroups, and families. The book emphasizes the importance of field morphology and diagnostic features for classification, while also incorporating laboratory data where necessary. The classification aims to provide a framework for organizing knowledge about Australian soils and facilitating communication among scientists and land users. The third edition includes significant changes, such as the introduction of a new Order for deep sands ( Arenosols) and the removal of the "weakly developed tenic B horizon" concept. The book also provides detailed guidelines for classifying soil profiles and addresses common challenges in soil classification, such as distinguishing between soil and parent material and dealing with buried soils.The *Australian Soil Classification Third Edition* by R. F. Isbell and the National Committee on Soil and Terrain provides a comprehensive guide to classifying Australian soils. The book, published by CSIRO Publishing in 2021, is 192 pages long and covers various aspects of soil classification, including key to soil orders, anthroposols, arenosols, calcarosols, chromosols, dermosols, ferrosols, hydrosols, kandosols, kurosols, organosols, podosols, rudosols, sodosols, tenosols, vertosols, and glossary terms. The classification system is designed to be general-purpose and hierarchical, with orders, suborders, great groups, subgroups, and families. The book emphasizes the importance of field morphology and diagnostic features for classification, while also incorporating laboratory data where necessary. The classification aims to provide a framework for organizing knowledge about Australian soils and facilitating communication among scientists and land users. The third edition includes significant changes, such as the introduction of a new Order for deep sands ( Arenosols) and the removal of the "weakly developed tenic B horizon" concept. The book also provides detailed guidelines for classifying soil profiles and addresses common challenges in soil classification, such as distinguishing between soil and parent material and dealing with buried soils.