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All Journal Jurnal Tanah dan Iklim Jurnal Pengabdian Masyarakat dan Riset Pendidikan
R. SITUMORANG
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Agriculture, Biological Sciences & Forestry Humanities Education Languange, Linguistic, Communication & Media Mathematics Other

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NITROGEN TRANSFORMATION IN FLOODED SOIL : APPLICATION OF RICE STRAW AND RICE STRAW COMPOSTS AND ITS EFFECT ON NITROGEN UPTAKE AND ACETYLENE REDUCTION ACTIVITY IN RICE PLANT RHIZOSPHERE INDRIYATI, L.T; SABIHAM, SUPIYANDI; DARUSMAN, L.K; SITUMORANG, R.; SUDARSONO, .; SISWORO, W.H
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 26 (2007): Desember 2007
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n26.2007.%p

Abstract

The use of organic materials aimed in reducing the dependence on inputs such as chemical fertilizers can contribute to sustainability and improving the low N fertilizer efficiency of rice plants in paddy soils. Therefore, better understanding of N transformation in flooded soils, particularly the microbial transformation of N-organic amendments to plant-available N, is needed for most efficient use of soil and organic materials N for aiding in the selection of N management practices for sustainable agriculture. The experiments were conducted at the laboratory and in the greenhouse of Soil Department, Faculty of Agriculture, Bogor Agricultural University. Incubation experiment was conducted at room temperature for 120 days to observe the availability of N-NH4+ in soil amended rice straw or rice straw composts and its combination with urea. After 21 days of incubation period, the rice straw amended soils showed that NNH4+ release was higher than the other treatments. The 4-monthand 8-month-compost of rice straw showed that N mineralization rate was lower and the N availability was lower than rice straw. The results of pot experiment in greenhouse revealed that the added rice straw was comparable with urea in its effect on the increase of dry matter weight of rice plants, number of tillers, Nuptake of rice, and recovery N efficiency. The application of rice straw, however, promoted the activity of nitrogenase enzyme higher than rice straw composts. The effect of rice straw on observed parameters were much better than its composts.
Keterkaitan Teks Proposal Bahasa Indonesia Dengan Keterampilan Penyusunan Proposal Bisnis Mahasiswa Akuntansi: Penelitian T. K. A. Br Purba; S. Ramadhani; S. F. A. Sitorus; A. V. D. Simbolon; R. R. P. Nasution; R. Situmorang; M. A. J. Daulay
Jurnal Pengabdian Masyarakat dan Riset Pendidikan Vol. 4 No. 2 (2025): Jurnal Pengabdian Masyarakat dan Riset Pendidikan Volume 4 Nomor 2 (October 202
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jerkin.v4i2.2934

Abstract

This study aimed to analyze the relationship between proposal texts in Indonesian language courses and accounting students’ business proposal writing skills. The research applied a qualitative descriptive method, collecting data through observation, literature review, and analysis of student proposals. The findings revealed that mastery of proposal text structure in Indonesian significantly influenced the quality of business proposals prepared by students. Those who understood linguistic rules, writing systematics, and logical argumentation were able to produce business proposals that were more systematic, persuasive, and feasible. In addition, students with better mastery of academic writing skills demonstrated stronger critical thinking and creativity in formulating business ideas. These results confirm that academic Indonesian language proficiency serves as a crucial foundation for developing entrepreneurial competencies, ensuring that accounting graduates are not only competent in theory but also prepared to compete in real business practices.
Co-Authors A. V. D. Simbolon I Dewa Gde Mayun Permana L.K Darusman L.T Indriyati M. A. J. Daulay R. R. P. Nasution S. F. A. Sitorus S. Ramadhani SUPIYANDI SABIHAM T. K. A. Br Purba W.H SISWORO