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Criteria for Defining the Soil Family and Soil Sibling: The Fourth and Fifth Categories of the New Zealand Soil Classification

Paperback / softback

Main Details

Title Criteria for Defining the Soil Family and Soil Sibling: The Fourth and Fifth Categories of the New Zealand Soil Classification
Authors and Contributors      By (author) T.H. (Trevor Haddon) Webb
By (author) L. R. Lilburne
SeriesLandcare Research science series
Series part Volume No. 3
Physical Properties
Format:Paperback / softback
Pages:38
Dimensions(mm): Height 210,Width 145
ISBN/Barcode 9780478347289
ClassificationsDewey:631.440993
Audience
Tertiary Education (US: College)
Professional & Vocational
Edition 2nd New edition

Publishing Details

Publisher Manaaki Whenua Press
Imprint Manaaki Whenua Press
Publication Date 6 October 2011
Publication Country New Zealand

Description

Soils need to be classified so they can be identified and mapped. The classification of soils in New Zealand is described in two publications in the Landcare Research Science Series: The New Zealand Soil Classification (Hewitt 2010) and this new report by Webb and Lilburne, Criteria for defining the soil family and soil sibling. The New Zealand Soil Classification classifies NZ soils into 15 soil orders, each of which is divided successively into soil groups and subgroups; this provides an important framework to understand the occurrence and broad properties of soils in the landscape. Criteria for defining the soil family and soil sibling defines the next two levels of classification: soil families and siblings. The sibling is the primary entity depicted on soil maps. Families and siblings separate soils into well defined classes that define each soil's physical composition. The family criteria separate soils on the basis of three criteria: the nature of the soil profile material to 1.0 metre depth, the dominant texture in the upper 0.6 m, and minimum permeability within 1.0 m depth. The sibling criteria separate soils mainly according to the composition of horizons that make up the soil profile. This report builds upon and replaces the Criteria for defining the soil form (LRSS3 First edition, Clayden & Webb 1994).