Download e-book for iPad: A Handbook of Soil Terminology, Correlation and by Pavel Krasilnikov, Juan-Jose Ibanez Marti, Richard Arnold,

By Pavel Krasilnikov, Juan-Jose Ibanez Marti, Richard Arnold, Serghei Shoba

ISBN-10: 1844076830

ISBN-13: 9781844076833

Soil type and terminology are primary matters for the transparent figuring out and conversation of the topic. even if, whereas there are numerous nationwide soil type platforms, those don't without delay correlate with one another. This ends up in confusion and nice hassle in venture comparative medical examine that pulls on a couple of method and in making experience of foreign medical papers utilizing a procedure that's unexpected to the reader. This booklet goals to elucidate this place by means of describing and evaluating varied structures and comparing them within the context of the realm Reference Base (WRB) for Soil assets. The latter used to be arrange to solve those difficulties by means of growing a world 'umbrella' method for soil correlation. All soil scientists should still then classify soils utilizing the WRB in addition to their nationwide structures. The publication is a definitive and crucial reference paintings for all scholars learning soils as a part of lifestyles, earth or environmental sciences, in addition to expert soil scientists. released with foreign Union of Soil Sciences

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Extra info for A Handbook of Soil Terminology, Correlation and Classification

Example text

In thematic maps, such as the soil ones, the principal subject is represented in detail by including a large range of subclasses. Thus, the definition of the classes of features represented by the symbols is just as much part of the map accuracy as putting them in the right place on the map. Defined classes and subclasses of map features should be consistent and used systematically. Pedologists attempt to do this by applying taxonomy and other guidelines when surveying soil landscapes. Dent and Young (1981) associate map scales with different types of soil cartographic units and the US Soil Survey Manual (Soil Survey Division Staff, 1993, p48) has a key for identifying kinds of soil surveys and their common taxonomic components.

The difference in quantitative criteria between classifications can be illustrated by an example of organic soils. Histosols in the WRB, as well as peat soils in the new Russian classification, should have an organic horizon thicker than 50cm, whereas in old Russian classification this limit was 30cm, and in Soil Taxonomy 40cm (60cm for fibric material). Thus, the WRB Histosols group appears to be in some cases broader and in some cases narrower than Histosols of the US Soil Taxonomy. The problem is aggravated by the fact that some terms used in these classifications are similar, thus increasing misunderstanding.

Hidden structures in soil classifications As mentioned in Chapter 2, a hierarchical taxonomy is just one of the possible ways to arrange soil classes. Some important classification systems, such as the new French soil classification (AFES, 1998) and the World Reference Base for Soil Resources (WRB) (IUSS Working Group WRB, 2006) are stated to be reference bases with no or little hierarchy. Though these classifications will be discussed in more detail later, it is important to know if structural rules may be applied to these ‘non-hierarchical’ classifications.

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A Handbook of Soil Terminology, Correlation and Classification by Pavel Krasilnikov, Juan-Jose Ibanez Marti, Richard Arnold, Serghei Shoba

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