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

Tee, Bee Heoh (2001) Spatial Yield Variation and Soil N in a Mature Oil Palm Plantation : A Case Study in Sabah. Masters thesis, Universiti Putra Malaysia.

[img] PDF
617Kb

Abstract

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%.

Item Type:Thesis (Masters)
Subject:Soil management - Nitrogen - Fixation - Oil palm - Tawau - Case studies
Chairman Supervisor:Dr. Anuar Abd. Rahim
Call Number:FP 2001 10
Faculty or Institute:Faculty of Agriculture
ID Code:10552
Deposited By: Mohd Nezeri Mohamad
Deposited On:04 May 2011 03:45
Last Modified:04 May 2011 03:46

Repository Staff Only: Edit item detail

Document Download Statistics

This item has been downloaded for since 04 May 2011 03:45.

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


Universiti Putra Malaysia Institutional Repository

Universiti Putra Malaysia Institutional Repository is an on-line digital archive that serves as a central collection and storage of scientific information and research at the Universiti Putra Malaysia.

Currently, the collections deposited in the IR consists of Master and PhD theses, Master and PhD Project Report, Journal Articles, Journal Bulletins, Conference Papers, UPM News, Newspaper Cuttings, Patents and Inaugural Lectures.

As the policy of the university does not permit users to view thesis in full text, access is only given to the first 24 pages only.