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All Journal Jurnal Ilmu Pertanian Indonesia JTSL (Jurnal Tanah dan Sumberdaya Lahan) Journal of Degraded and Mining Lands Management AGRIVITA, Journal of Agricultural Science SAINS TANAH - Journal of Soil Science and Agroclimatology Molekul: Jurnal Ilmiah Kimia Asian Journal of Agriculture PRIMA: Journal of Community Empowering and Services Community Empowerment AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Agroindustrial Journal JURNAL HUTAN TROPIS ENVIRO: Journal of Tropical Environmental Research
Widyatmani Sih Dewi
Department Of Soil Science, Faculty Of Agriculture, Sebelas Maret University
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Public Health Social Sciences Transportation

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Impact of Moringa Leaf Liquid Fertilizer on P Uptake and Grain Yield of Organic Rice in Inceptisols Dewi, Widyatmani Sih; Loveana, Okta; Rahmawati, Rani; Sudadi, Sudadi; Purwanto, Purwanto; Rachmawatie, Srie Juli; Cahyono, Ongko
AGRIVITA Journal of Agricultural Science Vol 46, No 2 (2024)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v46i2.4067

Abstract

In an effort to solve the P availability issue in Inceptisols, fermentation is one method used to enhance the quality of liqiuid organic fertilizer (LOF) made from Moringa (Moringa oleifera). The type and concentration determine the effectiveness of LOF on nutrient uptake and plant yields. This study aims to evaluate the impact of LOF types, concentrations, and their interactions on P uptake and rice grain yield in Inceptisols. The research was conducted in a greenhouse using a completely random design (CRD) with two factors. The first factor is the type of LOF, consisting of two levels, i.e., fresh and fermented Moringa extract. The second factor is the LOF concentration, with four levels (i.e., 0, 20, 40, 60, and 80 ml/l) and three replications. Data analysis using ANOVA, DMRT, and correlation. The study revealed that the interaction between LOF types and concentrations affects P uptake. The highest P uptake shown by fermented Moringa with a concentration of 60 ml/l was 20.02 mg/plant and 40 ml/l was 18.73 mg/plants., or 1.5 times higher than the control. Grain yield was not affected by type, LOF concentration, or interaction. Fermented Moringa has good potential as LOF, while the effect on grain yield needs further research.
Characteristics of Indigenous Bacterial Isolates from Cocoa Plantations in Meko Village, Central Sulawesi, with Ability to Degrade Cellulose Anak Agung Sagung Putri Risa Andriani; Widyatmani Sih Dewi; Novizar Nazir; Ni Luh Putu Putri Setianingsih; Eko Rini Indrayatie; Kalimutu, Krisnawan
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 7 No. 2 (2023)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

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Abstract

The characteristics of indigenous bacterial isolates in cocoa farms differ based on the study's location and methodology. More research is required to comprehend these bacterial isolates' diversity and features completely. This study intends to assess the cellulose-degrading capacity of bacterial isolates from cocoa plantations in Meko Village, Central Sulawesi. The shape of the bacterial colony, the shape of the colony's edge, elevation, colony size, color, and texture are considered during macroscopic morphological identification and microscopic morphological identification after gram stain. Afterward, gram stains the bacteria to determine the type of cell wall. Hydrolysis capacity was then identified macroscopically by observing colony shape, colony periphery, colony color, colony appearance and height, and hydrolysis capacity on media in a petri dish (HC). Upon microscopic examination of cell shape and bacterial wall type (Gram-positive and gram-negative). Based on the research findings and identification of bacteria capable of degrading cellulose in cocoa soil, it can be inferred that among the 28 examined isolates, six isolates have the greatest HC index values in KL62 isolates. In contrast, GL66, KL23, and KL62x isolates have medium HC index values.
Recovery of soil carbon pools and C–N stoichiometry under drought in degraded tin-mined soils using organic, inorganic, and bio-amendments RAHAYU, RAHAYU; ERDASWIN, FARHAN; ROSARIASTUTI, RETNO; DEWI, WIDYATMANI SIH; FATIMAH, FATIMAH; HERAWATI, AKTAVIA; ICHSAN, NURUL
Asian Journal of Agriculture Vol. 9 No. 2 (2025)
Publisher : Smujo International

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/asianjagric/g090248

Abstract

Abstract. Rahayu, Erdaswin F, Rosariastuti R, Dewi WS, Fatimah, Herawati A, Ichsan N. 2025. Recovery of soil carbon pools and C–N stoichiometry under drought in degraded tin-mined soils using organic, inorganic, and bio-amendments. Asian J Agric 9: 818-830. Large-scale tin mining on Bangka Island, Indonesia, has severely degraded soils, resulting in low carbon reserves and imbalanced C–N stoichiometry, particularly under seasonal drought. This study evaluated the effectiveness of an integrated amendment strategy to restore soil carbon pools and improve C–N stoichiometry under these challenging conditions. A 100-day screenhouse experiment was conducted on degraded tin-mined soil using a Completely Randomized Design. Treatments included municipal compost, dolomite, Lactic Acid Bacteria (LAB), and NPK fertilizer, applied individually and in combination. Key physicochemical properties, carbon pools, stoichiometric ratios, and their interrelationships were analyzed using ANOVA, Redundancy Analysis, and Pearson correlation. The integrated combination treatment was synergistically superior (ANOVA, p<0.01). The recovery of carbon pools was marked by a seven-fold surge in microbial biomass carbon to 703.73 mg kg-¹ and a near-doubling of the soil organic carbon stock to 29.21 Mg C ha-¹. The improvement in C–N stoichiometry was evidenced by the optimization of key microbial efficiency ratios, with the MBC/SOC ratio reaching 13.99% and the MBC/TN ratio increasing to 45.18%. Redundancy Analysis confirmed that compost-based treatments formed a distinct, functionally efficient group. Furthermore, Pearson correlation revealed the integrated nature of this recovery, showing a tight coupling between the accumulation of key carbon pools (SOC and MBC; r=0.909) and the enhancement of microbial C-use efficiency. In contrast, the dolomite amendment created a dysfunctional system by causing a massive accumulation of Dissolved Organic Carbon (DOC) to 279.18 mg kg-¹ without a corresponding increase in microbial biomass. A holistic, multi-ameliorant strategy anchored by a substantial organic matter base is essential for restoring ecosystem functions. This approach provides a robust and practical framework for the sustainable land management of degraded post-tin mining landscapes, offering a viable pathway to rebuild soil health and enhance drought resilience.
Pedotransfer functions for soil organic carbon stock and soil porosity interpretation in diverse palm oil plantation soils Tinuntun, Riris Srigayuh Tegarningtyas; Dewi, Widyatmani Sih; Mujiyo, Mujiyo; Herawati, Aktavia; Herdiansyah, Ganjar; Sumani, Sumani; Cahyo, Angger; Widjojo, Bagus Guritno; Prasetyo, Bangun Budi; Kotroczó, Zsolt
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 22, No 1 (2025): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v22i1.93460

Abstract

The accurate estimation of soil organic carbon stocks (SOCs) is crucial in sustainable oil palm plantation management. Pedotransfer functions (PTFs) serve as an essential predictive tool for enhancing the interpretation and estimation of soil organic carbon stocks (SOCs) and soil porosity. This study aims to improve the precision of SOCs and soil porosity predictions across diverse soil types within oil palm plantations through the application of PTFs. The study was conducted using a survey approach and descriptive exploration in an oil palm plantation in Seruyan District, Central Kalimantan. The study area encompassed four distinct soil types (Alfisols, Inceptisols, Ultisols, and Entisols), with six replicates for each soil type. Soil samples were collected from a depth of 0–60 cm. Statistical analyses included ANOVA, Tukey’s pairwise comparisons, correlation, and stepwise regression. The results indicated that soil types within oil palm plantations did not significantly affect SOCs but significantly impacted soil porosity. SOCs and porosity estimated using PTFs were lower than those estimated without PTFs. Specifically, SOCs analysis with PTFs ranged from 3.4 to 7.1 kg m-²; without PTFs, the range was higher, between 8.1 and 10.9 kg m-². Among the soil types, Entisols exhibited higher porosity with PTFs (51.3%), while Ultisols had the lowest porosity (37.9%). The PTFs provide better predictions for SOCs and porosity, and predictor variables that contribute the most are sand, silt, bulk density (BD), and cation exchange capacity (CEC). PTFs provide an advanced, data-driven approach to assessing SOCs and soil porosity in oil palm plantations, supporting the development of smarter, sustainable, and highly efficient management strategies.
Assessing soil fertility index under different forest land cover Dewi, Widyatmani Sih; Purwanto, Purwanto; Anisa, Siti Solikhatun; Hartati, Sri
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 21, No 2 (2024): December
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v21i2.67056

Abstract

Soil fertility is often evaluated under various forest land cover types to determine the capacity of each area to support plant productivity. Therefore, this study aimed to (1) assess the current soil fertility status of six land cover types in the Alas Bromo educational forest of Universitas Sebelas Maret using the Soil Fertility Index method and (2) identify the factors influencing the status. The six different land cover types investigated in this descriptive-exploratory study using a survey method included (1) pine, (2) pine-mahogany, (3) mahogany, (4) mixed trees, (5) annual crops, and (6) pine replanting, with four repetitions. Furthermore, the composite soil sample represented each repetitive area, and the assessment results showed that the soil fertility status was categorized as low to moderate. The categorization order was mahogany>mixed trees>pine replanting>annual crops>pine>pine-mahogany which had fertility indices of 0.57, 0.56, 0.53, 0.51, 0.49, and 0.45, respectively. Soil fertility determinants across the six land cover types comprised litterfall, breast height diameter, and tree density. Future investigations should evaluate the relationship between litter quality, soil biota, and decomposition rate with fertility to identify the appropriate strategy for fertility enhancement on each land cover.
Effect of Microbial Fuel Cell, fertilizer, and plant spacing on nitrogen dynamics in paddy soil Efendi, Syahrul; Komariah, Komariah; Syamsiyah, Jauhari; Dewi, Widyatmani Sih; Hiramatsu, Ken; Azhar Fauzan, Adhia
SAINS TANAH - Journal of Soil Science and Agroclimatology Vol 21, No 1 (2024): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/stjssa.v21i1.86312

Abstract

Nitrogen is one of the primary nutrients required for growing rice. Still, the efficiency of urea fertilizer application is very low (20-40%) due to the nitrogen loss process, one of which is denitrification. This study aims to determine the effects of combining Microbial Fuel Cell (MFC), plant spacing, and fertilization on nitrogen dynamics in paddy fields. The combination of treatments are expected to reduce the nitrogen loss in paddy fields, and plants can absorb it efficiently. A total of six treatments included Microbial Fuel Cell (MFC) (2 levels: without MFC and with MFC), plant spacing (2 levels: conventional spacing 25 cm × 25 cm and jajar legowo spacing 25 cm × 12.5 cm × 50 cm), and fertilization (2 levels: without fertilizer and with 500 kg ha-1 of NPK fertilizer), with three replications for each combination. The observed parameters included total soil nitrogen, nitrate, nitrogen uptake, chlorophyll, nitrogen-fixing and denitrifying bacteria, and N2O gas emissions. The results showed that combining MFC, conventional spacing, and NPK fertilizer in the paddy fields resulted in a high total soil nitrogen (0.44%). The results showed different effects on total soil nitrogen in the MFC and fertilization treatments, leading to increased nitrate levels, nutrient uptake, and chlorophyll. Increasing total soil nitrogen significantly contributes to leaf development and significantly aids photosynthesis. The integration of MFC and fertilization observed in this study resulted in a real impact on nitrogen dynamics in paddy fields. This combined treatment effectively reduces total nitrogen loss due to denitrification in paddy fields, thereby increasing the efficiency of uptake by plants.
Kompos Pelet: Solusi Praktis Berkelanjutan, dan Berbasis Ekonomi Sirkular dalam Pengelolaan Sampah Rumah Tangga Rosariastuti, MMA Retno; Sutami, Sutami; Dewi, Widyatmani Sih; Sudadi, Sudadi
PRIMA: Journal of Community Empowering and Services Vol 10, No 1 (2026): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/prima.v10i1.110663

Abstract

Pellet Compost: A Practical, Sustainable, and Circular Economy-Based Solution for Household Waste Management. One type of waste that is readily available is leaf litter. Leaf litter is a major contributor to household waste. Compostable waste has great potential to be utilized optimally to provide both economic and ecological benefits. This community service program was carried out from July to November 2025 through several stages: preparation, implementation, and evaluation. The purpose of this activity is to process organic waste into environmentally friendly pellet-based compost. Pellet-based compost is a solid organic fertilizer formed into pellets. Its shelf life is longer than loose compost. Pellet compost is drier, more visually appealing, richer in nutrients, and has a higher market value. The ingredient ratio in pellet production is a key factor that determines the quality, efficiency, and final performance of the pellets. The best ingredient ratio for pellet production between compos: tapioca flour: coconut shell charcoal: and water is 10:1:1:2. The sale of coconut shell charcoal pellets yields higher profits compared to bran and dolomite, amounting to Rp. 2,478 per piece. This approach offers a practical and sustainable solution, providing ecological benefits by reducing organic waste and supporting a circular economy in waste management. This community service initiative is expected to help the community understand how to produce pellet compost, enabling them to meet agricultural needs independently without relying on external raw materials. The program demonstrates that solving environmental issues can go hand in hand with improving the regional economy. This reflects the essence of Sustainable Development Goal (SDG) 12, which is responsible consumption and production.
Azolla microphylla sebagai Alternatif Sumber Pupuk Organik dalam Budidaya Padi di Lahan Pasir Pantai Herawati, Aktavia; Mujiyo, Mujiyo; Minardi, Slamet; Herdiansyah, Ganjar; Dewi, Widyatmani Sih; Putri, Nuraini Dwi Agustina
PRIMA: Journal of Community Empowering and Services Vol 8, No 2 (2024): December
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/prima.v8i2.110067

Abstract

Azolla microphylla as an Alternative Source of Organic Fertilizer in Rice Cultivation on Sandy Soil Field. Rice (Oryza sativa L.) is a commodity that has high economic value in Srigading Village, Sanden District, Bantul Regency. Azolla is a water fern that has high potential as a source of organic fertilizer. The use of azolla as a source of organic fertilizer is not widely known. The partner involved in this activity is Majelis Taklim Nailul Hidayah, which is not economically/socially productive, but its main livelihood is farming, especially rice. The rice cultivation system carried out by partners so far is still based on the conventional system, which utilizes chemical fertilizers. Azolla can serve as a source of organic fertilizers, acting as a substitute for or reducing the need for chemical fertilizers, thereby reducing dependence on them. The activity aims to increase partners' understanding of utilizing azolla for organic fertilizers through azolla cultivation, which is a straightforward process. The method planned for this activity involves explaining the introduction and development of azolla, as well as practicing the technique of multiplying azolla. The stages of the activity included site surveys, hands-on azolla cultivation, and the application of azolla to rice plants in sandy soil. The results showed that the partners already knew how to cultivate azolla, how to apply azolla, and the benefits of azolla on rice growth. Azolla microphylla was cultivated in ponds lined with tarpaulins measuring 2 m x 3 m x 0.5 m, using 0.5 kg of fresh azolla seedlings. Azolla was harvested 2 weekafter sowing, with one pond producing 37.5 kg of wet azolla, representing a 75-fold increase and a productivity of 12.5 kg/m³.
Viability of Agrobacterium sp. I26 and Agrobacterium sp. I30 in The Carrier Formula of Mocaf Solid Waste, Peat and Manure Rosariastuti, Retno; Nur Sabilla, Widya Putri; Sudadi, Sudadi; Dewi, Widyatmani Sih
ENVIRO: Journal of Tropical Environmental Research Vol 24, No 2 (2022): September
Publisher : Center for Environmental Research, LPPM, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/enviro.v24i2.70354

Abstract

Agrobacterium sp. I26 and Agrobacterium sp. I30 are bioremediation agent that can be used as functional bacteria in biofertilizers. The storage of these bacteria requires carrier. Not all carriers can support bacterial viability, so it was necessary to examine carrier formulas as basic ingredients for biofertilizers which the quality standards based on the Minister of Agriculture Regulation No. 70/2011. This research aimed to: (1) study the viability of Agrobacterium sp. I26 and Agrobacterium sp. I30 in some carrier formulas; and (2) obtain the best carrier formula to support the viability of Agrobacterium sp. I26 and Agrobacterium sp. I30. Research design was factorial using completely randomized design (CRD) as the based design, consisting of 2 factors: 1) Carrier Fornula (C): C1; C2; C3; C4; C5, 2) Bacteria (I): I1; I2; I3, so there were 15 treatment combinations each was repeated 4 times, thus there were 60 experimental units. The results showed that Agrobacterium sp. I26 has better viability than Agrobacterium sp. I30 during 90 days incubation period. The best bacterial viability with total bacterial as the indicator was C4 carrier formula: 74 x 10­13 cfu.g-1 for Agrobacterium sp. I26 and C3 carrier formula: 155 x 1012 cfu.g-1.
Co-Authors Achmad Adi Surya Sustama Ahmad Yunus Aisyah Defara Rahmadani AKTAVIA HERAWATI Anak Agung Sagung Putri Risa Andriani Anak Agung Sagung Putri Risa Andriani Anggita, Akas Anisa, Siti Solikhatun Arlindo Fernando Macie Arwa Farida Lukito Atmanto Heru Wibowo Atmanto, Heru Azhar Fauzan, Adhia Bambang Pujiasmanto Cahyo, Angger Canggih Jati Nusantara Canggih Jati Nusantara, Canggih Jati Desti Dian Amalina Dwi Priyo Ariyanto Efendi, Syahrul Eko Rini Indrayatie ERDASWIN, FARHAN Farida Yuliani fatimah Fatimah Ferina Pungky Ganjar Herdiansyah Ganjar Herdiansyah Ganjar Herdiansyah, Ganjar Hardian, Tiara Hasanah, Khalyfah Herwin Setyaningsih Hery Widijanto Hiramatsu, Ken Ika Ernawati Indratin Indratin Indratin Indratin Irmawati, Viviana Istiqomah, Nanda Mei Jauhari Syamsiyah Jauhari Syamsiyah Kalimutu, Krisnawan Komariah K Komariah Komariah Komariah Komariah Kotroczó, Zsolt Krisnawan Kalimutu Kurniatun Hairiah Loveana, Okta Muhammad Rizky Romadhon Mujiyo Mujiyo Ni Luh Putu Putri Setianingsih Ni Luh Putu Putri Setianingsih Noorcahyati Noorcahyati Novizar Nazir Nur Sabilla, Widya Putri Ongko Cahyono Prabang Setyono Prasetyo, Bangun Budi Purnomo Edi Sasongko Purwanto Purwanto Purwanto Purwanto Purwanto Purwanto PUTRI HANDAYANI Putri Permatasari Putri, Nuraini Dwi Agustina Rachmawatie, Srie Juli Rahayu Rahayu Rahayu Rahayu Rahayu Rahayu Ramdan Hidayat Rani Rahmawati Retno Rosariastuti Romadhon, Muhammad Rizky Sapja Anantanyu Slamet Minardi Sri Hartati Sri Rossati Sri Rossati Sri Wahyuni Sri Wahyuni Sudadi Sudadi Sudadi Sudadi Sudjono Utomo Sukamto, Ika Sumiyarsi Sulandjari Sulandjari Sumani . Sumani Sumani Sumani Sumani Sumarno . Sumarno Sumarno Sumarno Sumarno Sumarno Sumarno Suntoro Suntoro Suntoro Suntoro Supriyadi Supriyadi Supriyadi Supriyadi Supriyadi Supriyadi Suryono Suryono Suryono Suryono Sutami, Sutami Sutarno Sutarno Tinuntun, Riris Srigayuh Tegarningtyas Usman Siswanto Vita Ratri Cahyani Wahyu Adi Nugroho Wahyu Galang Pranata Widjojo, Bagus Guritno Yoviana Erdhika Adiarti