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All Journal Jurnal Pertanian Terpadu JTERA (Jurnal Teknologi Rekayasa)
Suratama, Susana M.
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Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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The Effect of Traditionally Combustion Method of Bamboo Leaves Ash in Concrete Mixtures Suratama, Susana M.; Febriyani, Elisabeth R.; Nday, Albert Aun Umbu
JTERA (Jurnal Teknologi Rekayasa) Vol 8, No 2: December 2023
Publisher : Politeknik Sukabumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31544/jtera.v8.i2.2023.191-198

Abstract

Rapid industrialization, households, and commerce emerging waste problems. Not only in urban societies but also in rural communities. The rural communities receive waste from their environmental condition of agro-industrial waste such as bamboo leaves. The leaves are usually dried and burned in open spaces. Former studies concluded that silica content can be found in rice husks, bamboo leaves, sugarcane bagasse, and so on by combustion process. The traditional combustion method is a simple method by which burnt bamboo leaves can produce ash with contains more carbon. This study lifted a way to produce more silica by extracting the ash using citric acid. The citric acid supports quick combustion to reduce inorganic and organic material in bamboo leaves. This process resulted in BLA in white color. The BLA substitute the cement content of concrete with composition of 0%, 7%, 8%, and 9%. The parameter in this study is to measure the density of concrete mixtures by using UPV apparatus and to measure the strength of concrete compressive by using a compression machine. The results concluded that the BLA provides a sufficient density of concrete and The BLA concrete strength has decreased with the added amount of BLA. The strength of BLA has contrasted with other studies that described improving the strength of concrete by BLA substitute from 5% to 30%. Therefore, the combustion process is still necessary to improve by taking more time for extraction and combustion process. Also, controlling slump degradation can affect water/ratio which can also affect the concrete strength.
Determinasi Faktor Produksi terhadap Produktivitas Padi Sawah di Wilayah Perbatasan: Studi Empiris di Desa Motaulun, Malaka Barat Klau, Maria Ingria; Koehuan, Jonathan Ebed; Kette, Arlindo U. S.; Suratama, Susana M.; Dethan, Jemmy J. S.
Jurnal Pertanian Terpadu Vol 13 No 2 (2025): Jurnal Pertanian Terpadu Jilid XIII Nomor 2 Desember 2025
Publisher : Sekolah Tinggi Pertanian Kutai Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36084/jpt..v13i2.626

Abstract

Motaulun Village in West Malaka District is a center of rice paddy production in the Indonesia–Timor-Leste border region. However, rice productivity in this village remains suboptimal despite favorable land and climate potential. This study aims to analyze the influence of production factors such as land area, seed quantity, fertilizer, labor, and farming experience on rice yield. This study employed a quantitative survey of 41 purposively selected rice farmers, with data analyzed using multiple linear regression to assess the effects of land area, seed use, fertilizer, labor, and farming experience on rice production. The results show that land area, seeds, and fertilizer have a positive and significant effect on rice production, while labor and farming experience are not significant. The regression model has a coefficient of determination (R²) of 0.741, indicating that the model can explain 74.1% of the variation in rice production. These findings provide an important empirical basis for agricultural extension agents and policymakers in designing evidence-based strategies to improve agricultural productivity, particularly in rural and border areas with limited resources.
Co-Authors Febriyani, Elisabeth R. Jemmy Jonson Sula Dethan Jonathan Ebet Koehuan Kette, Arlindo U. S. Klau, Maria Ingria Nday, Albert Aun Umbu