Abstract:Cut and fill calculation is an essential stage in open-pit mining activities to determine the volume of soil or rock that must be excavated (cut) and deposited (fill) based on elevation changes between the actual topographic…
phic conditions and the planned mine design. This study aims to analyze the results of cut and fill volume calculations using GEOVIA Surpac software in a coal pit area. The data used include topographic maps obtained from RTK (Real Time Kinematic) surveys. The calculation results show a total cut volume of 805.42 MT and a fill volume of 2.09 MT, with a net volume of 803.33 MT, using a rock density of 1. The use of Surpac has proven effective and accurate in calculating material volumes and supporting the optimization of mine design.
Abstract:The excrement of horned beetle (Oryctes rhinoceros (Linn.) Scarabeus.) larvae, namely Kolarhino, in the soil of palm oil (Elaeis guineensis Jacq.) plants contains minerals that can and can improve soil fertility and health.…
th. These larvae contain minerals that can fertilize the soil, such as zinc (Zn), felium (Fe), potassium (K), and phosphorus (P) which are important for plant growth and soil health. Luffa acutangula (L.) Roxb. plants contain many carbohydrates and sources of nutrients needed by microbes to multiply. The mineral content of gambas in the process of local microorganisms for soil fertility is calcium (Ca), phosphorus (P), and felium (Fe) which are very supportive in the process of soil fertility. In this study, the mixture given to Histosol soil is the content of Oryctes rhinoceros (Linn.) Scarabaeus. larvae faeces: Kolarhino and Local Microorganisms (MoL) of Luffa acutangula (L.) Roxb. gave a positive impact on Histosol soil both physically and chemically.
Abstract:Organosol soil has a very high content, but has a low soil acidity (pH) (acidic). As well as the occurrence of very slow decomposition of organic matter. The treatment with Ananas comosus (L.) Merr. extract, which contains…
ns bioactive compounds such as bromelain enzymes, organic acids, and simple sugars, can accelerate the decomposition of organic matter and support the activity of soil microorganisms. The Local Microorganisms (MoL) applied, such as Solanum lycopersicum (L.) and Saccharum officinarum Linn., contain various functional microbes such as Lactobacillus sp., Saccharomyces sp., and Azotobacter sp., which play a role in nitrogen fixation, phosphate solubilisation, and organic matter decomposition. Overall, the results of research and observations conducted on Organosol soil media treated with Ananas comosus (L.) Merr. extract with the addition of Local Microorganisms (MoL) Solanum lycopersicum (L.) and Saccharum officinarum Linn. has been proven to effectively improve the chemical properties and fertility of Organosol soil through its role in increasing microbial activity and accelerating the decomposition of organic matter. This indicates that innovations in the application of fruit and the role of local microorganisms have the potential to be developed as environmentally friendly technologies for sustainable soil management.
Abstract:This study investigates the tensile uplift capacity of screw piles in clay soil as an alternative anchoring system for slope stabilization in cohesive ground conditions. The research aims to address the limited availability…
ity of empirical field data on screw-pile behavior under repeated loading and to evaluate the agreement between theoretical predictions and actual in situ responses. The methodology employs an experimental approach through in situ testing with screw-pile diameters of 10 cm, 15 cm, and 20 cm, and embedment depths ranging from 0.6 m to 1.0 m. The tests were conducted under both static and repeated tensile loading using a hydraulic jack system, accompanied by vertical deformation measurements to establish load–displacement curves. Theoretical capacity was calculated using a limit equilibrium approach for comparison with experimental results. The findings reveal a nonlinear load–displacement response, characterized by initial stiffness followed by progressive deformation into the post-yield stage. At a maximum load of 2.858 tons, deformation increased with diameter, from 5.10 cm (10 cm) to 8.49 cm (20 cm). Under repeated loading, failure occurred at a lower load of approximately 1.6 tons with a maximum deformation of 1.648 cm, indicating potential capacity degradation due to cyclic loading. The comparison between theoretical and field results shows significant deviations, with analytical predictions generally underestimating the in situ capacity. This highlights the limitations of simplified models that do not fully account for shaft adhesion, installation disturbance, soil heterogeneity, pore-water pressure effects, and cyclic degradation. Overall, this study contributes valuable field pull-out test data for screw piles in clay under repeated loading, emphasizing the need for design calibration based on full-scale testing for slope stabilization applications. The results also suggest opportunities for further research involving long-term monitoring and advanced modeling of cyclic degradation.
Abstract:The rehabilitation of post-mining land with low nutrient content is carried out using chemical and organic materials. To improve soil fertility, the application of fertilizers is required. Soil fertility is crucial as a…
medium for plant growth to enable replanting. Once the planting medium is available, it is then cultivated with plants suitable for the land conditions. The methodology of this study involved observing land conditions by examining soil structure, texture, and pH in the research area. The results showed that the soil texture belongs to the sandy clay loam or clay loam class, with a soil pH of 3.72. Soil improvement was carried out by applying dolomite lime at 100 grams per planting hole, requiring a total of 66.7 kilograms. Goat manure was applied at 2 kilograms per planting hole, with a total requirement of 133.4 kilograms for 667 trees. The tree species planted were Sengon (Paraserianthes falcataria) and Trembesi (Samanea saman).
Abstract:Post-mining land generally exhibits low nutrient levels, requiring soil enhancement via the use of chemical or organic amendments. The application of fertilizers and lime markedly affects soil conditions and can improve…
soil fertility. Soil fertility is essential as a substrate for plant growth to support reforestation or reclamation initiatives. After the planting medium is properly prepared, it can be inhabited with plant species appropriate for the site's conditions. This study's methodology involves assessing land conditions through the analysis of soil characteristics and the measurement of soil pH in the designated area. The study's results indicated that the soil texture in the research region is classified as sandy loam and loamy sand, with an average pH of 4.5. To enhance soil conditions, 100 grams of lime is necessary for each planting hole, totaling 625 trees. Therefore, 62.5 kg of dolomite lime per hectare is required for soil rehabilitation in the post-mining region.
Abstract:Infeksi kecacingan adalah salah satu penyakit yang sering dijumpai dalam masyarakat dan diakibatkan oleh parasit nematoda usus atau parasit golongan Soil Transmitted Helminths (STH). Salah satu pekerjaan yang berisiko terinfeksi…
rinfeksi parasit yaitu petugas pengangkut dan pengelola sampah, sebab mereka akan bersentuhan langsung dengan sampah atau kotoran tanpa menggunakan alat pelindung diri. Tujuan dari penelitian ini, yaitu untuk mengetahui hasil identifikasi telur cacing Soil Transmitted Helminths (STH) pada kuku petugas pengangkut dan pengelola sampah di TPS 3R Padangsambian Kota Denpasar, Bali. Sampel yang digunakan dalam penelitian ini yaitu sampel kuku yang diambil dari petugas pengangkut dan pengelola sampah di TPS 3R Padangsambian Kota Denpasar Bali yang berjumlah 38 sampel. Pemeriksaan telur cacing ini dilakukan dengan metode sedimentasi menggunakan larutan NaCl 0,9%. Penelitian ini dilakukan di Laboratorium Parasitologi STIKES Wira Medika Bali. Data hasil penelitian di analisa dengan cara deskriptif. Berdasarkan hasil penelitian dari sampel kuku, petugas pengangkut dan pengelola sampah di TPS 3R Padangsambian Kota Denpasar Bali diperoleh 2 sampel (5,2%) ditemukan telur cacing Soil Transmitted Helminths (STH) spesies Ascaris lumbricoides pada kedua sampel dan 36 sampel (94,8%) lainnya negatif atau tidak ditemukan telur cacing. Saran kepada para petugas pengangkut dan pengelola sampah untuk selalu menggunakan Alat Pelindung Diri secara lengkap dan tepat saat bekerja dan selalu menjaga kebersihan diri serta kebersihan lingkungan.
Abstract:Households, as the smallest environment in society, contribute to the generation of waste. To reduce the occurrence of soil, water and air pollution in the environment due to household waste, organic waste can be processed…
ed into compost. The purpose of this activity is to increase the knowledge of partners through awareness and demonstration and invite the community to manage organic waste in their environment to be composted. The service was conducted in Bukit Permata Sumbari II Housing located in Pekanbaru. The partners are housewives who live in the housing with a total of 15 people. Activity methods include awareness raising, counseling, demonstration and evaluation. The knowledge and understanding of housewives in Bukit Permata Sumbari II Housing towards processing household waste into compost increased by 23.70%. Participants had basic knowledge about the utilization of household waste into compost by 69.63%, while after counseling it increased to 93.33%. Housewives have the skills and are able to make compost, although the results are not optimal because the organic waste is still large, so the composting process takes a long time.
Abstract:Abstract: Nagari Simpang, Pasaman Regency, is an agrarian area where maize is the main commodity, cultivated using conventional practices that rely heavily on hybrid seeds and inorganic fertilizers. In the long term, this…
s pattern leads to increased production costs, declining soil fertility, and low added value of agricultural products. In addition, suboptimal household waste management contributes to environmental pollution. This community service program aimed to revitalize a sustainable maize farming system through the integration of composite maize seeds and organic waste processing technology. The program was conducted from July to November 2025, involving approximately 30 farmers. The methods included an initial survey, program socialization, training on organic fertilizer production, establishment of a composite maize demonstration plot, and evaluation using pre-test and post-test. Data were analyzed using descriptive quantitative methods. The results showed an increase in participants’ understanding of composite maize seeds and improved skills in producing organic fertilizer. Higher post-test scores (3-4,2) compared to pre-test (1-2) indicate the effectiveness of the training and mentoring approaches. Additionally, there was an increase in community awareness regarding the utilization of organic waste. This program contributed to enhancing farmers’ capacity and independence and serves as an initial step toward developing a sustainable agriculture system based on local resources.
Keywords: composite maize; household waste; community empowerment; sustainable agriculture; organic fertilizer
Abstrak: Nagari Simpang, Kabupaten Pasaman merupakan wilayah agraris dengan komoditas utama jagung yang dikelola secara konvensional dan bergantung pada benih hibrida serta pupuk anorganik. Pola ini dalam jangka panjang menyebabkan peningkatan biaya produksi, penurunan kesuburan tanah, serta rendahnya nilai tambah hasil pertanian. Selain itu, pengelolaan limbah rumah tangga yang belum optimal berdampak pada pencemaran lingkungan. Kegiatan pengabdian ini bertujuan merevitalisasi sistem pertanian jagung berkelanjutan melalui integrasi benih jagung komposit dan teknologi pengolahan sampah organik. Kegiatan dilaksanakan selama Juli–November 2025 dengan melibatkan ±30 petani. Metode meliputi survei awal, sosialisasi, pelatihan pembuatan pupuk organik, pembuatan demplot jagung komposit, serta evaluasi menggunakan pre-test dan post-test. Data dianalisis secara deskriptif kuantitatif. Hasil menunjukkan adanya peningkatan pemahaman mitra terkait benih jagung komposit serta peningkatan keterampilan dalam memproduksi pupuk organik. Skor post-test yang lebih tinggi (3-4,2) dibandingkan pre-test (1-2) menunjukkan efektivitas metode pelatihan dan pendampingan. Selain itu, terjadi peningkatan kesadaran lingkungan masyarakat terhadap pemanfaatan sampah organik. Kegiatan ini berkontribusi dalam meningkatkan kapasitas dan kemandirian petani serta menjadi langkah awal pengembangan sistem pertanian berkelanjutan berbasis sumber daya lokal.
Kata kunci: jagung komposit; limbah rumah tangga; pemberdayaan masyarakat; pertanian berkelanjutan; pupuk organik
Abstract:challenge that frequently affects daily life. Generally, the community faces water sources that are discolored, oily, and emit unpleasant odors due to their origins as former rice fields or peat soil. Clean water is one…
of the main needs for humans for survival and is a determining factor in public health and welfare. Making clean water sources in Sidomulyo Village using the electrocoagulation method is one solution that can be offered. The electrocoagulation method involves utilizing electrical energy to coagulate and remove fine particles from water. By conducting simulations or raising awareness among the public about this method, it aims to provide assistance to the community while promoting understanding of how the electrocoagulation process can be used to purify contaminated water sources, addressing issues such as water discoloration, oiliness, and unpleasant odor.
Keywords: clean water; polluted water; electrocoagulation method
Abstrak : Masalah air bersih di Desa Sidomulyo terus menjadi isu yang sering muncul dalam kehidupan sehari-hari. Secara umum, air yang digunakan oleh masyarakat di desa tersebut memiliki warna coklat kekuningan, terkontaminasi oleh minyak, dan memiliki aroma yang tidak sedap. Hal ini terjadi karena sumber air yang digunakan berasal dari bekas lahan pertanian sawah atau tanah gambut. Keberadaan air bersih sangat penting bagi kehidupan manusia dan berperan krusial dalam menjaga kesehatan dan kesejahteraan masyarakat. Salah satu solusi yang dapat diterapkan untuk menciptakan sumber air bersih di Desa Sidomulyo adalah dengan menggunakan metode elektrokoagulasi. Metode elektrokoagulasi adalah proses penggumpalan dan pengendapan partikel-partikel halus dalam air dengan menggunakan energi listrik. Diharapkan dengan melakukan simulasi atau penyuluhan kepada masyarakat tentang metode elektrokoagulasi, maka masyarakat dapat terbantu sekaligus memahami tentang aplikasi metode elektrokoagulasi untuk penjernihan sumber air yang tercemar seperti warna air yang kuning kecoklatan, berminyak, dan berbau.
Kata kunci : air bersih; air tercemar; metode elektrokoagulasi