Using terrain algorithms on a digital elevation model to evaluate yield variability in oil palm

Martinez Alberto, . and Camberato James J., . and Owens Phillip, . and Ashtekar Jenette, . Using terrain algorithms on a digital elevation model to evaluate yield variability in oil palm. pp. 84-92. ISSN 1511-2780

Oil palm (Elaeis guineensis Jacq.) plantations face strong pressure to improve fertiliser-use effciency. Digital soil mapping methods based on topographic analysis using globally-available digital elevation models (DEM) provide an effcient means of quantifying topography-driven variability of soil properties within oil palm plantations. The shutter radar topography mission (SRTM) global digital elevation model (GDEM) was used as the basis for modeling topography across an individual oil palm plantation. Terrain algorithms were used to model terrain attributes and generate continuous soil property maps along topographic soil classes in conjunction with georeferenced soil samples as model inputs. The resulting raster layers of soil property values were evaluated for mean error and their correlation to yield variability across the plantation. Modifed catchment area (MCA) an iterative measure of a landscape position represented by a grid cells propensity to lose or gain soil water was found to have a strong effect on yield suggesting that soil moisture distribution was an important driver of yield variability in this system.

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Abstract

Oil palm (Elaeis guineensis Jacq.) plantations face strong pressure to improve fertiliser-use effciency. Digital soil mapping methods based on topographic analysis using globally-available digital elevation models (DEM) provide an effcient means of quantifying topography-driven variability of soil properties within oil palm plantations. The shutter radar topography mission (SRTM) global digital elevation model (GDEM) was used as the basis for modeling topography across an individual oil palm plantation. Terrain algorithms were used to model terrain attributes and generate continuous soil property maps along topographic soil classes in conjunction with georeferenced soil samples as model inputs. The resulting raster layers of soil property values were evaluated for mean error and their correlation to yield variability across the plantation. Modifed catchment area (MCA) an iterative measure of a landscape position represented by a grid cells propensity to lose or gain soil water was found to have a strong effect on yield suggesting that soil moisture distribution was an important driver of yield variability in this system.

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Item Type:	Article
AGROVOC Term:	Oil palm
AGROVOC Term:	Elaeis guineensis
AGROVOC Term:	Soil sampling
AGROVOC Term:	Soil moisture
AGROVOC Term:	Statistical analysis
AGROVOC Term:	Yields
AGROVOC Term:	Plantations
AGROVOC Term:	Topography
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:55
URI:	http://webagris.upm.edu.my/id/eprint/9800

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