A factual key for the recognition of Australian soils 4th edition (Book)

This book, written by CSIRO’s Keith Northcote, was the primary soil classification system in Australia until it was largely superseded by the Australian Soil Classification (ASC) in the late 1990s. Unlike earlier systems, Northcote’s key is based entirely on soil profile morphology (physical characteristics observable in the field) rather than inferences about how the soil formed. Soils are identified by alphanumeric codes (e.g., Dr4.21) that describe key attributes like texture, colour, and structure. The key provided the technical framework for the Atlas of Australian Soils, which remains a critical digital resource for national soil data. While the Australian Soil Classification is now the official national standard, this book is still referenced in historical land surveys and ecological studies. Digital conversion tables such as the CSIRO Correlation Tables exist to translate Northcote’s PPF codes into modern ASC orders. This resource is included in the collection for its historical value. As a historical publication, it may contain information or practices that are outdated, no longer considered best practice, or inconsistent with current legislation or scientific understanding. Copies of this edition can still be found in university libraries or from specialty used book sellers (124 pages). #

Resource Last Updated: May 29, 2026

Disclaimer:
This is a carefully curated database of important soil resources. The data base is not exhaustive but rather a library of what we believe are the most useful for the audience we are trying to serve – you. Where numerous items cover the same content, we have chosen the one we believe to be the best.

Each resource has been added after careful consideration against our selection criteria; including but not limited to its scientific validity, accessibility, and readability. The library does not include scientific journal literature as this is available via a number of other channels and is not considered to be the material the core audience for this list wants.

SSA reminds user of these resources that they are a guide only and due to regular advances in our understanding of soil science it is important to check the suitability of the information for your purpose with an appropriately qualified professional such as a RSP.

Resource Suggestion
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We welcome your suggestions about valuable soil resources that could be included in the Smart Soils Resource Library. Please read this information before proceeding. Please remember, this Resource Library does not include scientific journal articles.

New resources are evaluated by Soil Science Australia’s membership of soil specialists.

Each new library resource is added after careful consideration, it must:
1. demonstrate good quality soil science. The resources must be scientifically valid. Case studies that contribute significantly to the understanding of soil management in Australian regions are also accepted.
2. be relevant to Australian soils, condition, constraints and management practices
3. add value to the Resource Library. If there are multiple resources in the Resource Library on the same topic then the suggested resource must improve on the existing resources that address the topic.
4. be readily available preferably in an electronic version. Some books may be out of print but should be available in libraries or from second-hand booksellers. The file size of resources should enable easy downloading or streaming.
5. be written in language appropriate for the intended audience.

Preferably, the resource should also meet the requirements of Web Content Accessibility Guidelines (WCAG) 2.1. to make web content more accessible and user friendly for everyone.

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