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Akhmad Rizalli Saidy
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Acta Solum
Published by Universitas Lambung Mangkurat
ISSN : -     EISSN : 29875145     DOI : https://doi.org/10.20527/actasolum.v1i2
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Acta Solum is a journal that publishes authoritative and original refereed articles on topics relevant to soil science. Acta Solum encourages the exchange of information between environmental managers, pure and applied scientists, and national and international authorities on soil science.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Tanah
Articles 134 Documents
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Assessment of Soil Degradation under Different Land Uses and Conservation-Based Management in Banjar Subdistrict, Buleleng Regency Made Sri Sumarniasih; Cindy Anita Sitanggang; I Wayan Narka
Acta Solum Vol. 4 No. 3 (2026): July 2026
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v4i3.3714

Abstract

Land-use change and agricultural intensification in Banjar Subdistrict have the potential to degrade soil quality and disrupt biomass production. This study aimed to assess the potential, spatial distribution, and status of soil degradation under different land uses and to formulate conservation-based management strategies. The methods included field surveys, laboratory analyses, and spatial analysis using Geographic Information Systems (GIS) through overlay techniques of land use, soil type, slope, and rainfall maps. Soil samples were collected from 13 Homogeneous Land Units (HLUs) representing different land-use types and biophysical conditions. The results showed that moderate soil degradation potential dominated an area of 9,801.46 ha (85.55%), followed by high potential on steep slopes covering 1,026.02 ha (8.95%) and low potential in lowland areas covering 629.96 ha (5.50%). The soil degradation status was classified as light and distributed into three spatial units (R.I-p; R.I-p,f,a; R.I-p,v,a), with permeability, soil fraction, porosity, and pH as the main limiting factors. Recommended management practices include terracing, runoff control, cover cropping, organic matter application, crop rotation, and balanced fertilization.
Chemical Characteristics of Water Hyacinth Pellet Fertilizer with Different Adhesive Materials Nukhak Nufita Sari; Ronny Mulyawan; Irvan Indra Resnawan
Acta Solum Vol. 4 No. 3 (2026): July 2026
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v4i3.3724

Abstract

High application of inorganic fertilizers can negatively affect soil fertility and environmental sustainability. Organic farming uses organic materials to improve soil quality and support sustainable crop production. Water hyacinth (Eichhornia crassipes), an invasive aquatic weed, has potential as a raw material for pellet organic fertilizer. This study aimed to evaluate the chemical characteristics of water hyacinth pellet fertilizer using different adhesive materials in accordance with SNI 7763:2024 and to determine the most suitable adhesive material. The research was conducted using a descriptive-experimental method with three adhesive treatments: ET1 = water hyacinth flour + tapioca flour; ET2 = water hyacinth flour + wheat flour; and ET3 = water hyacinth flour + rice bran flour. Each treatment was repeated three times. All treatments used a ratio of 1:2:4 (water: water hygienist: adhesive). Chemical analyses included pH, organic C, total N, total P, total K, total macronutrients, and the C/N ratio. The results showed that pellet fertilizers with tapioca and wheat flour adhesives met the SNI standards for pH and organic C but did not meet the standards for total macronutrients and the C/N ratio. Pellet fertilizer with rice bran flour adhesive met the SNI standards for pH, organic C, and total macronutrients, although its C/N ratio exceeded the maximum standard limit. Rice bran adhesive also produced the highest total N, P, K, and total macronutrient contents among the treatments. Overall, rice bran flour was identified as the most suitable adhesive for improving the chemical quality of water hyacinth pellet fertilizer, in accordance with SNI 7763:2024.
Combined Basal and Foliar NPK Fertilization Effects on Soil Properties and Rice Production Shiamita Kusuma Dewi; Winih Sekaringtyas Ramadhani; Naiya Aninda; Hery Novpriansyah; Afandi
Acta Solum Vol. 4 No. 3 (2026): July 2026
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v4i3.3741

Abstract

Rice (Oryza sativa L.) productivity in intensively cultivated paddy systems is limited by soil fertility loss and low nutrient use efficiency of conventional NPK fertilization, which is prone to ammonia volatilization, leaching, and phosphorus fixation in tropical soils. Foliar NPK application is proposed to bypass soil nutrient losses and improve fertilizer efficiency, but its combined effects with basal fertilizer on soil properties and rice production in tropical paddy conditions are poorly understood. This study aimed to evaluate the effects of combined basal and foliar NPK fertilization on selected soil properties and rice production under tropical paddy conditions in Central Lampung. A field experiment was conducted using a Randomized Complete Block Design with 8 treatments and 4 replications, comprising combinations of basal and foliar NPK. Soil properties, including pH, soil dispersion ratio, and soil texture, alongside agronomic parameters, were associated with rice production. The results showed that combined basal and foliar NPK application significantly affected soil pH, with treatment H having a higher soil pH than the control and the standardized fertilizer. Combined application also significantly improved rice agronomic performance, with treatment H recording the highest rice production of 4.23 kg plot⁻¹, representing a 50% increase over the control treatment. These findings show that combining basal and foliar NPK fertilization can potentially manage nutrients to sustain soil fertility and enhance rice production in tropical paddy systems.
Geomorphological Controls on Soil Fertility Across Potential Rice Expansion Areas in Tropical Lowlands Bagus Adi Nugroho; Adiprasetya Widyatama; Halim Ma'shum; Bardhian Cahyo Aji Gumilang
Acta Solum Vol. 4 No. 3 (2026): July 2026
Publisher : Department of Soil, Faculty of Agriculture, Lambung Mangkurat University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/actasolum.v4i3.3742

Abstract

Geomorphological variability strongly influences soil fertility conditions in tropical lowland environments and plays an important role in determining the potential for rice expansion. This study evaluated geomorphological controls on soil fertility across potential areas for rice expansion in Makroman, East Kalimantan, Indonesia, using a pedogeomorphic approach. Geomorphic units were delineated through visual interpretation of satellite imagery, field observations, and DEMNAS-derived elevation data. The study area was classified into four major geomorphic units: floodplains, undulating plains, rolling plains, and slopes. Soil fertility characteristics, including soil pH, soil organic carbon (SOC), and cation exchange capacity (CEC), were obtained from field-based soil observations and laboratory analyses across representative geomorphic units. The results revealed a clear fertility gradient across geomorphic units associated with dominant geomorphic processes. Floodplain environments exhibited the highest pH (5.8), SOC (1.7%), and CEC (32.4 cmol(+) kg⁻¹), whereas slopes showed lower pH (4.9), SOC (0.8%), and CEC (27.3 cmol(+) kg⁻¹). Intermediate conditions were observed in undulating and rolling plains, reflecting transitional redistribution and runoff-dominated processes. Depositional environments favored the accumulation of fine particles, organic matter, and exchangeable base cations, while erosional and leaching processes progressively reduced nutrient retention in elevated landscapes. These findings demonstrate that soil fertility variability in tropical lowlands is controlled not only by geomorphic position but also by the dominant geomorphic processes operating across the landscape. The study highlights the importance of geomorphology-based approaches for supporting sustainable rice expansion and land management in tropical agricultural environments.

Page 14 of 14 | Total Record : 134

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