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All Journal Journal of Tropical Soils TERRA : Journal of Land Restoration
Utami, Wanda Afrilia
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Environmental Science

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Groundwater Retention Based on Toposequence in People’s Oil Palm Plantations Utami, Wanda Afrilia; Hermawan, Bandi; Prawito, Priyono; Barchia, Muhammad Faiz; Sukisno; Putri, Elsa Lolita
TERRA : Journal of Land Restoration Vol. 7 No. 2 (2024)
Publisher : BPFP Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/terra.7.2.110-115

Abstract

Soil, water, and crops are interdependent components of agricultural systems, and understanding their characteristics and interactions is critical for effective agricultural management. This study investigates the relationship between soil water-holding capacity and varying land slope gradients. The research was conducted on a community oil palm plantation in Talang Tengah I Village, Pondok Kubang District, Central Bengkulu Regency. A purposive sampling method was applied at five slope categories: flat (0–8%), sloping (8–15%), moderately steep (15–25%), steep (25–45%), and very steep (45–100%). Data analysis was performed using Partial Least Squares Structural Equation Modeling (PLS-SEM) with WarpPLS 7.0 software. The findings demonstrate a significant influence of slope on soil water-holding capacity. Increasing slope gradients are associated with reduced soil permeability, increased bulk density, decreased total pore space, and lower soil organic carbon content, collectively leading to diminished water-holding capacity. The developed model accurately represents the relationships between variables, indicating that slope directly affects organic matter, sand content, and permeability, while bulk density impacts total pore space and permeability, which in turn influence water-holding capacity. The results emphasize the importance of considering land slope in soil and water management strategies to optimize agricultural productivity. Future applications of this model could guide sustainable land-use planning and inform erosion control measures to maintain soil quality and water availability in sloped agricultural landscapes  
Model of the Relationship Between Selected Soil Physical Properties of Oil Palm Soil Hermawan, Bandi; Putri, Elsa Lolita; Utami, Wanda Afrilia; Prawito, Priyono
JOURNAL OF TROPICAL SOILS Vol. 31 No. 1: January 2026
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts..v31i1.35-43

Abstract

Soil, water, and plants are interrelated elements in agricultural production. An in-depth understanding of the characteristics and interactions of these three aspects is essential in effective agricultural system management. The study aims to examine the relationship between soil’s water-holding capacity and different land-slope levels and to identify the physical soil characteristics that affect it. The research was conducted in a community oil palm plantation in Talang Tengah I Village, Pondok Kubang District, Central Bengkulu Regency, Bengkulu Province. The method used was a survey with purposive sampling across five slope levels: flat (0-8%), sloping (8-15%), slightly steep (15-25%), steep (25-45%), and very steep (45-100%). The data were statistically analyzed using Partial Least Squares Structural Equation Modelling (PLS-SEM) with WarpPLS 7.0. The results showed that slope had a significant effect on various soil physical characteristics and soil water holding capacity. The steeper the slope, the greater the decrease in soil permeability, total pore space, and soil organic carbon, and the greater the increase in soil volume weight, which results in a decrease in soil water holding capacity. The resulting model shows agreement in describing the relationships between variables: slope affects organic matter, sand %, and permeability, and volume weight affects total pore space and permeability, which in turn affects the soil’s capacity to hold water.
Co-Authors Bandi Hermawan Maemunah Maemunah Muhammad Faiz Barchia, Muhammad Faiz Prawito, Priyono Putri, Elsa Lolita