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All Journal JTSL (Jurnal Tanah dan Sumberdaya Lahan) Jurnal Biologi Tropis BAKIRA: Jurnal Pengabdian Kepada Masyarakat
Kusuma, Eka Widiawati Wijaya
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Other

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PENDAMPINGAN KELOMPOK WANITA TANI DALAM PEMANFAATAN SAMPAH ORGANIK RUMAH TANGGA MENJADI EKOENZIM DI DESA KAPUR, KABUPATEN KUBU RAYA, KALIMANTAN BARAT Adwiyani, Pustika; Herwitarahman, Alifiya; Ningsih, Sulistia; Muliandari, Nadya; Annisa, Baaqy Amri; Ramadhani, Amelia Arum; Sitorus, Dermawati; Kusuma, Eka Widiawati Wijaya; Mahmudi, Mahmudi; Safriadi, Safriadi; Setiyadi, Wahyu; Gunadi, Gunadi
BAKIRA: Jurnal Pengabdian Kepada Masyarakat Vol 6 No 1 (2025): BAKIRA : Jurnal Pengabdian Kepada Masyarakat
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LP2M) Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/bakira.2025.6.1.41-51

Abstract

Organic waste contributed for 54.4% of the total volume of household waste. Household waste management and decomposition of organic waste that is not managed properly can cause environmental pollution. The management of organic waste into ecoenzymes is one of the efforts that can be made in overcoming household organic waste. The purpose of this activity is to increase partners' knowledge and skills in managing household organic waste as ecoenzymes. This community service activity was carried out in Kapur Village, Kubu Raya Regency, West Kalimantan, in January 2025. The materials used consisted of household organic waste, water, and brown sugar. This community service activity began with a basic knowledge test in the form of a pre-test, followed by presentations, demonstrations, and evaluations in the form of a post-test. The results showed a significant increase in the post-test results on all indicators assessed, compared to the pre-test results. So it can be concluded that there was an increase in participants' understanding and skills from 47.17% before training to 96.17% after training.
Similarity Analysis of Physical Properties of Red Soils Formed from Quaternary and Tertiary Volcanic Parent Materials Kusuma, Eka Widiawati Wijaya
Jurnal Biologi Tropis Vol. 25 No. 4b (2025): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i4b.10700

Abstract

Indonesia hosts numerous active and inactive volcanoes that have produced a wide range of volcanic rocks, giving rise to diverse soil types, including red soils that are predominant in humid tropical regions. This study aimed to investigate the physical characteristics of two red soil pedons developed from Quaternary and Tertiary volcanic parent materials. Soil sampling was conducted at the Quaternary volcanic red soil pedon located in Tugu Village, Jumantono Sub-district, Karanganyar Regency, Central Java, and the Tertiary volcanic red soil pedon located in Nglanggeran Village, Patuk Sub-district, Gunungkidul Regency, Yogyakarta Special Region. Soil profile selection was conducted purposively based on morphological uniformity and representativeness. The analyzed soil physical properties included soil color, ten particle-size fractions, particle density, bulk density, and porosity. The highest degree of soil redness was observed in the Tertiary volcanic red soil pedon at Nglanggeran. This pedon comprises five horisons that mostly exhibit very low or uncertain degrees of similarity. In contrast, the Quaternary volcanic red soil pedon at Tugu consists of several horisons with comparable physical characteristics. Overall, the comparison between the Tertiary and Quaternary red soil pedons indicates substantial similarity, suggesting that the physical properties of mineral soils developed from volcanic materials are generally comparable despite differences in parent material age.
KORELASI SIFAT KIMIA TANAH PADA TOPSOIL DAN SUBSOIL LAHAN SAWAH DI AREA PESISIR KABUPATEN SAMBAS Kusuma, Eka Widiawati Wijaya; Manurung, Rinto; Hazriani, Rini
JTSL (Jurnal Tanah dan Sumberdaya Lahan) Vol. 13 No. 2 (2026)
Publisher : Departemen Tanah, Fakultas Pertanian, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtsl.2026.013.2.14

Abstract

Coastal alluvial paddy soils exhibit chemical characteristics influenced by hydrological dynamics, sedimentation processes, and the interaction between seawater and freshwater. Assessing the dynamics of soil chemical properties in both surface and subsurface layers is essential to understand the vertical distribution of nutrients, identify potential nutrient losses or accumulation, and support more accurate and sustainable soil fertility management. This study aimed to analyze the correlation between soil chemical properties in the topsoil (0–20 cm) and subsoil (20–50 cm) of coastal alluvial paddy soils. The parameters analyzed included pH H₂O, pH KCl, electrical conductivity (EC), cation exchange capacity (CEC), base saturation, total nitrogen, and exchangeable cations (Ca, Mg, K, and Na). Correlation analysis was conducted using statistical tests at a 5% significance level. The results showed significant correlations between soil chemical properties in the topsoil and subsoil, indicating strong vertical nutrient dynamics within the soil profile. In the topsoil, pH plays a key role in controlling phosphorus availability and cation balance, while in the subsoil, pH and salinity more strongly influence CEC, base saturation, and exchangeable cations. In addition, topsoil properties such as organic carbon and total nitrogen are associated with nutrient distribution in the subsoil through leaching and water movement processes. These findings provide important insights for improving sustainable soil fertility management in coastal paddy fields.
Co-Authors Adwiyani, Pustika Alifiya Herwitarahman Annisa, Baaqy Amri Gunadi Gunadi Mahmudi Mahmudi Manurung, Rinto Muliandari, Nadya Ramadhani, Amelia Arum rini hazriani Safriadi Sitorus, Dermawati Sulistia Ningsih, Sulistia Wahyu Setiyadi