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Spatial variability of soil organic carbon in oil palm: a comparison between young and mature stands

This study aimed at quantifying the spatial variability of Soil Organic Carbon (SOC), estimating SOC at unsampled locations and comparing the spatial variability of SOC between young and mature oil palm stands. Two study sites were chosen to represent two different palm age groups, i.e., 5 Years aft...

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Main Authors: Law, M. C., Balasundram, Siva Kumar, Mohd Hanif, Ahmad Husni, Ahmed, Osumanu Haruna, Harun, Mohd Haniff
Format: Article
Language:English
Published: Academic Journals 2009
Online Access:http://psasir.upm.edu.my/id/eprint/4914/1/4914.pdf
http://psasir.upm.edu.my/id/eprint/4914/
https://scialert.net/abstract/?doi=ijar.2009.402.417
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spelling my.upm.eprints.49142018-10-19T08:46:07Z http://psasir.upm.edu.my/id/eprint/4914/ Spatial variability of soil organic carbon in oil palm: a comparison between young and mature stands Law, M. C. Balasundram, Siva Kumar Mohd Hanif, Ahmad Husni Ahmed, Osumanu Haruna Harun, Mohd Haniff This study aimed at quantifying the spatial variability of Soil Organic Carbon (SOC), estimating SOC at unsampled locations and comparing the spatial variability of SOC between young and mature oil palm stands. Two study sites were chosen to represent two different palm age groups, i.e., 5 Years after Planting (YAP) and 17 YAP. A systematic sampling design was employed for soil sampling at the 0-20 cm depth based on a cluster of four palms that comprised three operational zones: Weeded Circle (WC), Frond Heap (FH) and Harvesting Path (HP). A total of 60 sampling clusters were obtained for each site. Soil samples were analyzed for SOC by dry combustion method. All measurement points were geo-referenced by differential Global Positioning System (dGPS). The SOC data were first explored using descriptive statistics, normality check, outlier detection and data transformation, followed by variography and interpolation. Spatial variability of SOC was mapped based on measured and kriged values. Results showed that all operational zones exhibited a definable spatial structure, which were described by either spherical or exponential models. All operational zones exhibited strong spatial dependence. Operational zones of 5-year old palms exhibited a shorter effective range than those of 17 year old palms. Additionally, SOC heterogeneity was evident among operational zones at both sites, where FH registered the highest SOC, followed by WC and HP. SOC concentration at 17 year old palms was found to be more stable than that from 5 year old palms. This study suggests spatial variability assessment appears to be a feasible technique to quantify the variability of SOC in oil palm cultivation. Academic Journals 2009 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/4914/1/4914.pdf Law, M. C. and Balasundram, Siva Kumar and Mohd Hanif, Ahmad Husni and Ahmed, Osumanu Haruna and Harun, Mohd Haniff (2009) Spatial variability of soil organic carbon in oil palm: a comparison between young and mature stands. International Journal of Agricultural Research, 4 (12). pp. 402-417. ISSN 1816-4897; ESSN: 2152-2553 https://scialert.net/abstract/?doi=ijar.2009.402.417 10.3923/ijar.2009.402.417
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description This study aimed at quantifying the spatial variability of Soil Organic Carbon (SOC), estimating SOC at unsampled locations and comparing the spatial variability of SOC between young and mature oil palm stands. Two study sites were chosen to represent two different palm age groups, i.e., 5 Years after Planting (YAP) and 17 YAP. A systematic sampling design was employed for soil sampling at the 0-20 cm depth based on a cluster of four palms that comprised three operational zones: Weeded Circle (WC), Frond Heap (FH) and Harvesting Path (HP). A total of 60 sampling clusters were obtained for each site. Soil samples were analyzed for SOC by dry combustion method. All measurement points were geo-referenced by differential Global Positioning System (dGPS). The SOC data were first explored using descriptive statistics, normality check, outlier detection and data transformation, followed by variography and interpolation. Spatial variability of SOC was mapped based on measured and kriged values. Results showed that all operational zones exhibited a definable spatial structure, which were described by either spherical or exponential models. All operational zones exhibited strong spatial dependence. Operational zones of 5-year old palms exhibited a shorter effective range than those of 17 year old palms. Additionally, SOC heterogeneity was evident among operational zones at both sites, where FH registered the highest SOC, followed by WC and HP. SOC concentration at 17 year old palms was found to be more stable than that from 5 year old palms. This study suggests spatial variability assessment appears to be a feasible technique to quantify the variability of SOC in oil palm cultivation.
format Article
author Law, M. C.
Balasundram, Siva Kumar
Mohd Hanif, Ahmad Husni
Ahmed, Osumanu Haruna
Harun, Mohd Haniff
spellingShingle Law, M. C.
Balasundram, Siva Kumar
Mohd Hanif, Ahmad Husni
Ahmed, Osumanu Haruna
Harun, Mohd Haniff
Spatial variability of soil organic carbon in oil palm: a comparison between young and mature stands
author_facet Law, M. C.
Balasundram, Siva Kumar
Mohd Hanif, Ahmad Husni
Ahmed, Osumanu Haruna
Harun, Mohd Haniff
author_sort Law, M. C.
title Spatial variability of soil organic carbon in oil palm: a comparison between young and mature stands
title_short Spatial variability of soil organic carbon in oil palm: a comparison between young and mature stands
title_full Spatial variability of soil organic carbon in oil palm: a comparison between young and mature stands
title_fullStr Spatial variability of soil organic carbon in oil palm: a comparison between young and mature stands
title_full_unstemmed Spatial variability of soil organic carbon in oil palm: a comparison between young and mature stands
title_sort spatial variability of soil organic carbon in oil palm: a comparison between young and mature stands
publisher Academic Journals
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/4914/1/4914.pdf
http://psasir.upm.edu.my/id/eprint/4914/
https://scialert.net/abstract/?doi=ijar.2009.402.417
_version_ 1643823036248358912
score 13.211869

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