CLASSIFYING SOILS AT THE ULTIMATE STAGE OF WEATHERING: A CONTINUING CHALLENGE FOR SUSTAINABLE AGROMANAGEMENT PRACTICES IN THE 21ST CENTURY

Oxisols cover approximately 23% of the land surface in the tropics and are utilized extensively for agricultural purposes in tropical countries. Under the variable input types of agricultural systems practiced locally, some of these soils still appear to have problems in terms of proper soil classif...

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Main Authors: Padmanabhan, Eswaran, Eswaran, Hari, Mermut, Ahmet
Format: Conference or Workshop Item
Published: 2010
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Online Access:http://eprints.utp.edu.my/2728/1/Padmanabhan.pdf
http://eprints.utp.edu.my/2728/
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spelling my.utp.eprints.27282017-03-20T07:59:58Z CLASSIFYING SOILS AT THE ULTIMATE STAGE OF WEATHERING: A CONTINUING CHALLENGE FOR SUSTAINABLE AGROMANAGEMENT PRACTICES IN THE 21ST CENTURY Padmanabhan, Eswaran Eswaran, Hari Mermut, Ahmet QE Geology Oxisols cover approximately 23% of the land surface in the tropics and are utilized extensively for agricultural purposes in tropical countries. Under the variable input types of agricultural systems practiced locally, some of these soils still appear to have problems in terms of proper soil classification and subsequently, hinder attempts to implement sustainable agro-management protocols. Therefore, the objective of this study is to examine the properties of some Oxisols and closely related soils in order to evaluate the classification of these soils. Soils from several countries in the tropics were used in this study. Field observations, water retention differences, apparent CEC of the subsurface horizons, extractable Fe-oxides and external specific surface areas of the clay fractions showed that many kandic horizons have surface properties that are similar to the oxic horizons. Micromorphology indicated that the genetic transition from the argillic to the oxic involves a diminishing expression of the argillic. It is proposed that the Oxisols be keyed out based only on the presence of an oxic horizon. The proposal provides a better basis for the classification of Malaysian soils and the development of meaningful soil management groups for plantations. 2010 Conference or Workshop Item PeerReviewed application/pdf http://eprints.utp.edu.my/2728/1/Padmanabhan.pdf Padmanabhan, Eswaran and Eswaran, Hari and Mermut, Ahmet (2010) CLASSIFYING SOILS AT THE ULTIMATE STAGE OF WEATHERING: A CONTINUING CHALLENGE FOR SUSTAINABLE AGROMANAGEMENT PRACTICES IN THE 21ST CENTURY. In: 19th World Congress of Soil Science, August 1-6, 2010, Brisbane, Australia. http://eprints.utp.edu.my/2728/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
topic QE Geology
spellingShingle QE Geology
Padmanabhan, Eswaran
Eswaran, Hari
Mermut, Ahmet
CLASSIFYING SOILS AT THE ULTIMATE STAGE OF WEATHERING: A CONTINUING CHALLENGE FOR SUSTAINABLE AGROMANAGEMENT PRACTICES IN THE 21ST CENTURY
description Oxisols cover approximately 23% of the land surface in the tropics and are utilized extensively for agricultural purposes in tropical countries. Under the variable input types of agricultural systems practiced locally, some of these soils still appear to have problems in terms of proper soil classification and subsequently, hinder attempts to implement sustainable agro-management protocols. Therefore, the objective of this study is to examine the properties of some Oxisols and closely related soils in order to evaluate the classification of these soils. Soils from several countries in the tropics were used in this study. Field observations, water retention differences, apparent CEC of the subsurface horizons, extractable Fe-oxides and external specific surface areas of the clay fractions showed that many kandic horizons have surface properties that are similar to the oxic horizons. Micromorphology indicated that the genetic transition from the argillic to the oxic involves a diminishing expression of the argillic. It is proposed that the Oxisols be keyed out based only on the presence of an oxic horizon. The proposal provides a better basis for the classification of Malaysian soils and the development of meaningful soil management groups for plantations.
format Conference or Workshop Item
author Padmanabhan, Eswaran
Eswaran, Hari
Mermut, Ahmet
author_facet Padmanabhan, Eswaran
Eswaran, Hari
Mermut, Ahmet
author_sort Padmanabhan, Eswaran
title CLASSIFYING SOILS AT THE ULTIMATE STAGE OF WEATHERING: A CONTINUING CHALLENGE FOR SUSTAINABLE AGROMANAGEMENT PRACTICES IN THE 21ST CENTURY
title_short CLASSIFYING SOILS AT THE ULTIMATE STAGE OF WEATHERING: A CONTINUING CHALLENGE FOR SUSTAINABLE AGROMANAGEMENT PRACTICES IN THE 21ST CENTURY
title_full CLASSIFYING SOILS AT THE ULTIMATE STAGE OF WEATHERING: A CONTINUING CHALLENGE FOR SUSTAINABLE AGROMANAGEMENT PRACTICES IN THE 21ST CENTURY
title_fullStr CLASSIFYING SOILS AT THE ULTIMATE STAGE OF WEATHERING: A CONTINUING CHALLENGE FOR SUSTAINABLE AGROMANAGEMENT PRACTICES IN THE 21ST CENTURY
title_full_unstemmed CLASSIFYING SOILS AT THE ULTIMATE STAGE OF WEATHERING: A CONTINUING CHALLENGE FOR SUSTAINABLE AGROMANAGEMENT PRACTICES IN THE 21ST CENTURY
title_sort classifying soils at the ultimate stage of weathering: a continuing challenge for sustainable agromanagement practices in the 21st century
publishDate 2010
url http://eprints.utp.edu.my/2728/1/Padmanabhan.pdf
http://eprints.utp.edu.my/2728/
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