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Jurnal Lahan Suboptimal
Published by Universitas Sriwijaya
ISSN : 22526188     EISSN : 23023015     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Lahan Suboptimal: Journal of Suboptimal Lands (JLSO) (p-ISSN 2252-6188; e-ISSN 2302-3015) publishes original research papers, literature reviews, and short communications that cover on topics relevant to suboptimal lands: freshwater swamps, tidal lowlands, peatlands, dry and dry acid lands, shaded ecosystem, ex-mined lands, saline and marine coastal wetland ecosystems. The Journal serves as a multi-disciplinary forum covering key issues in Suboptimal Lands science and technology, management, policy and ecological economics. The journal is published by Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO), Universitas Sriwijaya. The journal was first published on April of 2012 with twice per year in frequency on April and October.
Arjuna Subject : -
Articles 669 Documents
 63   64   65   66   67 
Population and attacks of Spodoptera frugiperda J.E. Smith (Lepidoptera: Noctuidae) on corn inoculated with endophytic entomopathogenic fungi from South Sumatra, Indonesia Dellania Eka Rindiani; Siti Herlinda; Suwandi Suwandi
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 13 No. 1 (2024): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.13.1.1024.707

Abstract

Spodoptera frugiperda damage in South Sumatra reached 100%. Biological control of S. frugiperda using entomopathogenic fungi has been widely practiced. This study aimed to determine S. frugiperda larval abundance and infestation in maize inoculated with endophytic entomopathogenic fungi. The three fungal isolates used in the current study consisted of one species of Beauveria bassiana (isolate code: JgSPK), one species of Penicillium citrinum (isolate code: JaTpOi (2)) and one species of Metarhizium anisopliae (isolate code: CaTpPga). Egg and larval, incidence and severity of S. frugiferda infestation were observed. All endophytic entomopathogenic fungal isolates could siginifcantly decrease the incidence and severity caused by S. frugiperda larvae. Corn seeds treated with endophytic entomopathogenic fungi did not affect the population of eggs and larvae. Fluctuations of the egg and larval population tended to be influenced by corn age.
Using the kriging method to establish a spatially reliable interpolator for peat depth variability M Edi Armanto; Mohd Zuhdi; D Setiabudidaya; Ngudiantoro Ngudiantoro; Elisa Wildayana
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 14 No. 1 (2025): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.14.1.2025.708

Abstract

Peatlands (according to the Governmental Regulation nr 71/2014) can be utilized for agriculture and plantation if the peat depths are less than 3 m or more than 3 m, peatlands have to be conserved or restored. Determining peat depths can be conducted in the fields by intensive surveys which were so expensive, inefficient, and ineffective, therefore it was essential to find our simple alternative methods how to measure peat depths easily. The research aimed to establish a spatially reliable interpolator for peat depth variability by utilizing the kriging method. The research was conducted in Seponjen Village, Kumpeh, Muaro Jambi, Jambi Indonesia. Primary data were processed by applying ArcGIS 10.3 software. The interpolated dataset of peat depths validated their actual dataset and performed an excellent relationship (indicated by a positive correlation coefficient, r = 0.920) and a coefficient of determination (R2 = 0.847). It indicated that the interpolated dataset could be utilized to make maps by kriging. The very deep peat (Site A) and the deep peat (Site B) showed a tendency for a strong autocorrelation of the data distribution of peat depths. Autocorrelation tended to be anisotropic towards the river on the shallow peat (Site C). A good interpolator of peat depth variability can be generated using the kriging method.
Total suspended solid distribution mapping using sentinel-2A imagery in Ketapang Waters, South Lampung Ahmad Al Fadel; Ellis Nurjuliasti Ningsih; Tengku Zia Ulqodry
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 14 No. 1 (2025): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.14.1.2025.711

Abstract

The distribution of total suspended solids (TSS) in coastal waters significantly affects water turbidity and light penetration, which affects aquatic ecosystems. The research aimed to compare the accuracy of algorithms using Sentinel-2A imagery to map the distribution of TSS in Ketapang Waters, South Lampung. Polynomial regression analysis and validation tests using R² and RMSE were performed to assess accuracy. The results showed that the Laili algorithm performed better, achieving an R² value of 0.9723 and a lower RMSE of 0.639, with TSS concentrations ranging from 17.26 to 22.90 mg/L. The derived third-order polynomial regression model y = -0.0228x³ + 1.3401x² - 25.16x + 170.08 effectively predicted TSS concentrations. Spatial distribution analysis showed higher TSS levels near the coastline, likely due to sediment input from human activities and natural hydrodynamic processes, which gradually decreased towards the offshore area. These findings demonstrate the potential of the Laili algorithm for remote sensing-based water quality monitoring in dynamic coastal environments. Future research should include seasonal variations and explore the integration of multiple algorithms to improve the accuracy of TSS estimation and better understand temporal fluctuations in coastal sediment dynamics.
Performance of intercropping corn on manure oil palm plantations on dry land Muhammad Umar Harun; Yakup Yakup; Marlin Seprila; Satria Jaya Priatna; Rina Sopiana; Habibulloh Habibulloh
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 14 No. 1 (2025): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.14.1.2025.718

Abstract

The intercroping area (IC) is around 0.5 ha from one hectare of mature oil palm (YH). The research aimed to observe the growth and yield of corn from the Bisi 16 variety in oil palm plantations from the SJ 5 variety and the effect of corn as IC on oil palm. The research location was in Mesuji Raya Sub-district, Ogan Komering Ilir, South Sumatra, from April 2024 to July 2024. The interspace number of oil palm of 1 ha were 12  and it was six interspaces as the object research was as frond staking. The research method used was non-experimental.  Each of front staking had two sample plots of corn (3×3 m), and samples  selected for each plot were 15 crops.  For oil palm (8×8×8 m) two samples of crops were beside the corn plot.  The total of  oil palm samples was 24 crops from oil palm IC, and compared to 24 crops from  monoculture.  The research results showed that the growth of IC corn was lower for plant height (16%), and the reduction in corn yield (26%) from one ha compared to the description. The total  yield from corn IC was approximately 2.09 tons of corn shells, which were lower from monoculture description. The growth and yield of oil palm IC were better than monoculture, with an increase a number of fruit bunches (9%) and FFB weight (11%).  Corn is an intercrop/polyculture crop in oil palm plantations after one or two years of production.
Analysis of consumption expenditures and determining factors of rice availability for households of lebak rice farmers in Kertapati District, Palembang Yunita Yunita; Riswani Riswani; Selly Oktarina
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 14 No. 1 (2025): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.14.1.2025.719

Abstract

Meeting nutritional needs is crucial for developing quality human resources, while food security depends on production capacity, purchasing power, and supply chain factors, influenced by socio-economic and ecological conditions. The research aimed to analyze the total income of farmer households, analyze the consumption expenditure of farmer households, and analyze the factors that influence the availability of rice for households of lowland rice farmers in Kertapati District, Palembang City. The research method used was a survey method. This research was carried out in July 2024 with a total of 50 samples selected simply at random.  The data processing method used to answer the first and second objectives is mathematical calculations to calculate rice farming income, non-rice farming income and non-farming income, as well as calculating food and non-food consumption expenditure. Meanwhile, to answer the third objective, multiple linear regression analysis was used. The results of this research showed that: 1) The average total household income of Lebak rice farmers was 4,457,241 IDR/month. 2) household food consumption expenditure for Lebak rice farmers was 2,674,626 IDR/month, while non-food consumption expenditure was 1,594,396,- IDR/month. 3). The availability of rice for lowland rice farmers' households is 2.65 kg/month, which was included in the low criteria.  Factors that influence the availability of rice for Lebak rice farming households were land area, income and age of the farmer. Land area and income has a positive effect, while farmer age has a negative effect.
Growth and yield of lettuce (Lactuca sativa L.) grown on different planting media volumes in a floating cultivation system Fitra Gustiar; Duwi Septiani; Hilda Agustina; Fikri Adriansyah; Fitri Ramadhani
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 14 No. 1 (2025): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.14.1.2025.721

Abstract

Lettuce (Lactuca sativa L.) is one of the vegetables that is widely loved because of its taste and nutritional content. The increase in lettuce production can be increased by the use of swamp land with floating cultivation during the flood season. The size of the pots used in floating system cultivation will affect the growth and number of plants that will be produced. The study aimed to determine the optimal of planting media volume on the growth and yield of lettuce in floating cultivation system. The research used a randomized block design with 4 treatments of planting media volume, namely 1.9 L (P1), 2.7 L (P2), 3.6 L(P3), and 5 L (P4). Each treatment was repeated 4 times and each replication consisted of 5 plants. The results showed that at the beginning of the growth of the media volume of 2.7 L would be faster, but at the time of harvest almost all parameters showed that plants with a media volume of 5 L produced a larger plant weight than the plant unit. Although the use of smaller volumes of media results in a smaller plant weight, the raft is able to accommodate a larger number of pots. So that the use of a media volume of 1.9 L will be better used for floating lettuce production.
Dynamics of soil organic matter, bulk density and infiltration rate on mining reclamation land Bakri Bakri; As’ad Syazili; Zhoen Pristoyo Tampubolon
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 14 No. 1 (2025): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.14.1.2025.723

Abstract

Post-mining land reclamation is carried out to restore the environmental functions of the land. Monoculture and multiculture planting patterns have different impacts on soil’s physical properties. This study aimed to determine the effects of analyzing soil organic matter, bulk density, and measuring soil infiltration rates in monoculture and multiculture planting patterns. The research used survey methods, data analysis through tabulation, and statistical techniques. The results indicated differences in soil physical properties between the two lands and among the variables. Mahayung land exhibited higher organic matter content (1.08%) compared to Banko land (0.66%). Additionally, the average infiltration rate in Mahayung land (3.02 cm/hour) was higher than in Banko land (2.56 cm/hour), and the bulk density in Mahayung land (1.40 g/cm³) was lower than in Banko land (1.62 g/cm³). Organic matter content influenced the infiltration rate by 70.69%, and affected bulk density by 49.39%. Finally, the different planting patterns affect soil physical properties, and the relationships among variables show significant results.
Utilization of coal burning waste fly ash as a soil improving material in red yellow podsolic soil Asia Afriyani; Ali Martinus; Inneke Fratiwi
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 14 No. 2 (2025): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.14.2.2025.727

Abstract

This research aimed to characterize and test the chemical properties of red-yellow podzolic soil and fly ash. The experiment was conducted using polybags with various dosage levels of 2 types of red-yellow podzolic soil, as well as fly ash. Dolomite was used as a control. The experiment used 3 types of experiments with 3 repetitions on the soil (A1=10 g of fly ash /polybag, A2=15 g of fly ash/polybag, A3=20 g of fly ash/polybag, and A0=10 g of dolomite/polybag as a control). The results showed that the application of fly ash waste can increase the pH of podzolic soil. There was an increase in K-dd from 0.34 to 1.36. Al-dd analysis of the addition of fly ash ameliorant Al-dd levels decreased quite significantly with an average of 5.26‒7.16. Al-dd levels were very low in treatment A3 with the addition of 20 g/polybag. H-dd analysis on Red and Yellow Podzolic soils resulted in an increase in the initial H-dd of the soil from 0.4 to 4.61‒7.16. The highest H-dd was in A2 with the addition of 15 g of fly ash/polybag and the lowest H-dd iss in treatment A3 with the addition of 20 g/polybag.
Integration of geographical information systems in the land suitability assessment for rice crops in Sleman District, Indonesia Sukron Romadhona; Sri Puryono; Mussadun Mussadun
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 14 No. 1 (2025): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.14.1.2025.728

Abstract

Peatlands (according to the Governmental Regulation nr 71/2014) can be utilized for agriculture and plantation if the peat depths are less than 3 m or more than 3 m, peatlands have to be conserved or restored. Determining peat depths can be conducted in the fields by intensive surveys which were so expensive, inefficient, and ineffective, therefore it was essential to find our simple alternative methods how to measure peat depths easily. The research aimed to establish a spatially reliable interpolator for peat depth variability by utilizing the kriging method. The research was conducted in Seponjen Village, Kumpeh, Muaro Jambi, Jambi Indonesia. Primary data were processed by applying ArcGIS 10.3 software. The interpolated dataset of peat depths validated their actual dataset and performed an excellent relationship (indicated by a positive correlation coefficient, r = 0.920) and a coefficient of determination (R2 = 0.847). It indicated that the interpolated dataset could be utilized to make maps by kriging. The very deep peat (Site A) and the deep peat (Site B) showed a tendency for a strong autocorrelation of the data distribution of peat depths. Autocorrelation tended to be anisotropic towards the river on the shallow peat (Site C). A good interpolator of peat depth variability can be generated using the kriging method.
Conservation strategy based on soil erodibility with several land covers and slopes in the upstream of Air Bengkulu Watershed Vinni Lovita; Bambang Sulistyo
Jurnal Lahan Suboptimal : Journal of Suboptimal Lands Vol. 14 No. 1 (2025): JLSO
Publisher : Research Center for Suboptimal Lands (PUR-PLSO), Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jlso.14.1.2025.731

Abstract

Global land cover changes driven by increasing demand for agricultural, residential, and industrial land have caused various environmental issues, including soil erosion. The study aimed to analyze soil erodibility values upstream of the Air Bengkulu watershed based on land cover and slope factors. The analysis was conducted using soil samples obtained through purposive sampling based on soil map units, topography, and land cover. Soil erodibility values were determined through laboratory analysis of organic matter, texture, structure, and soil permeability, followed by calculating erodibility. After obtaining the distribution of erodibility values, the next step involves identifying erodibility values based on slope and land cover to analyze the interaction between slope and land cover on erodibility values. Conservation recommendations are provided based on slope, land cover and consideration of community aspects to reduce erodibility values and minimize erosion risk. Results indicate that soil erodibility in the Air Bengkulu watershed ranges from very low to very high, with most areas classified as low. The findings suggest that soil erodibility values vary depending on land cover and slope. Higher erodibility values were observed in areas with minimal land cover, especially in mining and cultivated land with poor management practices. In contrast, dense vegetation such as forests and well-maintained plantations significantly reduced soil erodibility values. The interaction between slope and land cover plays a crucial role in determining soil susceptibility to erosion risk. Vegetative and mechanical conservation strategies are suggested to mitigate erosion risks, improve land productivity, and support ecosystem sustainability in the region.

Page 66 of 67 | Total Record : 669

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