Spatial Yield Variation and Soil N in a Mature Oil Palm Plantation : A Case Study in Sabah

One of the major challenges in oil palm plantations in recent times is the lack of proper interpretation of yield maps for site-specific management, and the identification and understanding of the causal factors influencing the variability of oil palm yields. The ability to find and comprehend th...

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Main Author:	Tee, Bee Heoh
Format:	Thesis
Language:	English English
Published:	2001
Subjects:	Soil management - Nitrogen - Fixation - Oil palm - Tawau - Case studies
Online Access:	http://psasir.upm.edu.my/id/eprint/10552/1/FP_2001_10.pdf
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id	my-upm-ir.10552
record_format	uketd_dc
spelling	my-upm-ir.105522024-04-17T01:32:53Z Spatial Yield Variation and Soil N in a Mature Oil Palm Plantation : A Case Study in Sabah 2001-05 Tee, Bee Heoh One of the major challenges in oil palm plantations in recent times is the lack of proper interpretation of yield maps for site-specific management, and the identification and understanding of the causal factors influencing the variability of oil palm yields. The ability to find and comprehend the soil factors influencing yield variabilities of oil palm will enable us to manage them more efficiently. A study was conducted in a mature oil palm plantation at Sri Kunak Estate, Tawau, Sabah, Malaysia with the objectives (i) to quantify and characterize the spatial and temporal yield variations of fresh fruit bunch (ffb) so as to determine the optimum management zones for oil palm plantations and create possible management zones for site-specific inputs (ii) to quantify and characterize the nature of spatial soil NH4+-N variation as influenced by long-term N fertilizer management (iii) to establish the inter-relationship between fib yields and soil NH/-N so as to develop optimum range of soil NH4+ -N for optimum oil palm growth and production. Two clusters of palms were selected; with and without N fertilizer applications for the past 1 0 years. Soil samples were analyzed for Total N, NH/ -N, N03--N, exchangeable K, and pH. Fresh fruit bunch (fib) yields were summarized on an annual basis. Relationship between fib yields and selected soil properties were investigated using regression analysis. Response of fib yields to soil NH/-N was compared using 6 empirical fertilizer response models. Geostatistical analysis was used to characterize the spatial yield variations of fib and soil NH/-N. Semivariance analysis revealed that within the plots, the increase in semivariance reached a peak at a range of about 2 to 3 -palm distance, suggesting that the optimum management zone for oil palm plantations was 37 palms. Application of N could sustain fib yields above 30 tha-1 y{l . Long-term N fertilizer applications reduced the annual fib yield fluctuations to between 35 and 45%. Soil management - Nitrogen - Fixation - Oil palm - Tawau - Case studies 2001-05 Thesis http://psasir.upm.edu.my/id/eprint/10552/ http://psasir.upm.edu.my/id/eprint/10552/1/FP_2001_10.pdf text en public masters Universiti Putra Malaysia Soil management - Nitrogen - Fixation - Oil palm - Tawau - Case studies Faculty of Agriculture Abd. Rahim, Anuar English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
advisor	Abd. Rahim, Anuar
topic	Soil management - Nitrogen - Fixation - Oil palm - Tawau - Case studies
spellingShingle	Soil management - Nitrogen - Fixation - Oil palm - Tawau - Case studies Tee, Bee Heoh Spatial Yield Variation and Soil N in a Mature Oil Palm Plantation : A Case Study in Sabah
description	One of the major challenges in oil palm plantations in recent times is the lack of proper interpretation of yield maps for site-specific management, and the identification and understanding of the causal factors influencing the variability of oil palm yields. The ability to find and comprehend the soil factors influencing yield variabilities of oil palm will enable us to manage them more efficiently. A study was conducted in a mature oil palm plantation at Sri Kunak Estate, Tawau, Sabah, Malaysia with the objectives (i) to quantify and characterize the spatial and temporal yield variations of fresh fruit bunch (ffb) so as to determine the optimum management zones for oil palm plantations and create possible management zones for site-specific inputs (ii) to quantify and characterize the nature of spatial soil NH4+-N variation as influenced by long-term N fertilizer management (iii) to establish the inter-relationship between fib yields and soil NH/-N so as to develop optimum range of soil NH4+ -N for optimum oil palm growth and production. Two clusters of palms were selected; with and without N fertilizer applications for the past 1 0 years. Soil samples were analyzed for Total N, NH/ -N, N03--N, exchangeable K, and pH. Fresh fruit bunch (fib) yields were summarized on an annual basis. Relationship between fib yields and selected soil properties were investigated using regression analysis. Response of fib yields to soil NH/-N was compared using 6 empirical fertilizer response models. Geostatistical analysis was used to characterize the spatial yield variations of fib and soil NH/-N. Semivariance analysis revealed that within the plots, the increase in semivariance reached a peak at a range of about 2 to 3 -palm distance, suggesting that the optimum management zone for oil palm plantations was 37 palms. Application of N could sustain fib yields above 30 tha-1 y{l . Long-term N fertilizer applications reduced the annual fib yield fluctuations to between 35 and 45%.
format	Thesis
qualification_level	Master's degree
author	Tee, Bee Heoh
author_facet	Tee, Bee Heoh
author_sort	Tee, Bee Heoh
title	Spatial Yield Variation and Soil N in a Mature Oil Palm Plantation : A Case Study in Sabah
title_short	Spatial Yield Variation and Soil N in a Mature Oil Palm Plantation : A Case Study in Sabah
title_full	Spatial Yield Variation and Soil N in a Mature Oil Palm Plantation : A Case Study in Sabah
title_fullStr	Spatial Yield Variation and Soil N in a Mature Oil Palm Plantation : A Case Study in Sabah
title_full_unstemmed	Spatial Yield Variation and Soil N in a Mature Oil Palm Plantation : A Case Study in Sabah
title_sort	spatial yield variation and soil n in a mature oil palm plantation : a case study in sabah
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Agriculture
publishDate	2001
url	http://psasir.upm.edu.my/id/eprint/10552/1/FP_2001_10.pdf
_version_	1804888566063431680

Spatial Yield Variation and Soil N in a Mature Oil Palm Plantation : A Case Study in Sabah

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