Incorporating spatial trends and anisotropy in geostatistical mapping of soil properties

The spatial variation in soil parameters often differs with direction. These differences may occur naturally or may be due to management practices. Regardless of their origin, they present a challenge in geostatistical mapping of soil parameters. Recommendations pertaining to the selection of an app...

Full description

Saved in:
Bibliographic Details
Published in:Soil Science Society of America journal 1997-01, Vol.61 (1), p.298-309
Main Authors: Crawford, C.A.G, Hergert, G.W
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Biological and medical sciences
CARTOGRAFIA
CARTOGRAPHIE
CARTOGRAPHY
Chemical, physicochemical, biochemical and biological properties
COMPARISONS
Earth sciences
Earth, ocean, space
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
KRIGING
MATERIA ORGANICA DEL SUELO
MATHEMATICAL MODELS
MATIERE ORGANIQUE DU SOL
METHODE STATISTIQUE
METODOS ESTADISTICOS
MODELE MATHEMATIQUE
MODELOS MATEMATICOS
Organic matter
Physics, chemistry, biochemistry and biology of agricultural and forest soils
PROPIEDADES FISICO-QUIMICAS SUELO
PROPRIETE PHYSICOCHIMIQUE DU SOL
SOIL CHEMICOPHYSICAL PROPERTIES
SOIL ORGANIC MATTER
Soil science
Soil surveys, classification and mapping
Soil surveys, classification and mapping, soil genesis
SOIL VARIABILITY
Soil-plant relationships. Soil fertility
Soil-plant relationships. Soil fertility. Fertilization. Amendments
Soils
SPATIAL VARIATION
STATISTICAL METHODS
Surficial geology
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The spatial variation in soil parameters often differs with direction. These differences may occur naturally or may be due to management practices. Regardless of their origin, they present a challenge in geostatistical mapping of soil parameters. Recommendations pertaining to the selection of an appropriate geostatistical method based on the current literature are often incomplete or contradictory. The purpose of this investigation was to provide a unified description, comparison, and discussion of different geostatistical methods for handling trend and anisotropy that may be present in measured soil properties. Soil organic matter content of the 0- to 20-cm depth from a field in continuous ridge-tilled corn (Zea mays L.) was used to compare five geostatistical methods: ordinary kriging with an isotropic semivariogram (OKI); ordinary kriging with an anisotropic semivariogram (OKA); ordinary kriging within local neighborhoods (OKN); universal kriging (UK); and median polish kriging (MPK). Organic matter maps produced from the five methods showed similar large-scale features but marked differences in the finer features. A comparison of percentage of total area in each organic matter range among mapping methods also showed strong similarities; however, the proportion of the field assigned to each range differed by as much as 7%. Larger differences would be expected at large sample spacing. Although the five methods produced similar maps, selection of the "best" technique should be based on selection of an associated model that best accounts for and describes the nature of the cause of the variation
ISSN:0361-5995
1435-0661
DOI:10.2136/sssaj1997.03615995006100010043x