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All Journal Jurnal Ilmiah Manajemen Agribisnis
Dipa Aditya
Program Studi Agribisnis, Fakultas Pertanian, Universitas Mayjen Sungkono, Mojokerto, Indonesia.
Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Environmental Science Social Sciences

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Theoretical Formulation of Organic-Fertilizer Feedstocks from Filter Aid, Seaweed Residue, and Cattle Manure : Formulasi Teoretis Bahan Baku Pupuk Organik dari Filter Aid, Residu Rumput Laut, dan Kotoran Sapi Dipa Aditya; Dedy Sekarmaji; Desy Ratnaningrum
Jurnal Ilmiah Manajemen Agribisnis Vol. 14 No. 2 (2026): Vol. 14 No. 2 (Juli - Desember 2026) Jurnal Ilmiah Manajemen Agribisnis 
Publisher : Program Studi Magister Agribisnis Universitas Pembangunan Nasional "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jimaemagri.v14i2.73

Abstract

Agro-industrial and livestock residues are potential organic-fertilizer feedstocks, but their composition must be screened before experimental composting. This study developed a theoretical formulation of filter aid, seaweed-processing residue, and cattle manure using a linear mixture model and mass-balance calculations based on existing laboratory characterization data. Under a screening scenario targeting an initial C/N ratio of 24 and an equal share of seaweed residue and cattle manure, the candidate proportion was 0.278:0.361:0.361 (approximately 1:1.30:1.30). The mixture was projected to contain 17.19% organic carbon, 0.85% nitrogen, a C/N ratio of 24.00, 281.71 ppm available Fe, 14,010.74 ppm total Fe, and an estimated pH of 5.76. These values fall within the screening limits used for the available parameters, but they do not demonstrate compliance of a finished organic-fertilizer product because P, K, moisture, heavy metals, maturity, and other required parameters were not evaluated. The study therefore provides a proof-of-concept formulation and identifies total Fe and raw-material variability as critical issues for subsequent composting, laboratory validation, and plant testing.
Financial Performance of Shallot Collectors in Mojokerto: ROOC and R/C Ratio Analysis: Kinerja Finansial Usaha Pengepul Bawang Merah di Mojokerto: Analisis ROOC dan R/C Ratio Ni Dewi Ambal Ikka; Ilyas Rifky Ramadhani; Khoirul Anam; Dipa Aditya; Nur Farida Kusumawati
Jurnal Ilmiah Manajemen Agribisnis Vol. 14 No. 2 (2026): Vol. 14 No. 2 (Juli - Desember 2026) Jurnal Ilmiah Manajemen Agribisnis 
Publisher : Program Studi Magister Agribisnis Universitas Pembangunan Nasional "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jimaemagri.v14i2.74

Abstract

Shallot collectors consolidate supply, handle postharvest activities, and connect farmers with markets, yet their firm-level financial performance is rarely measured. This study analyzes the operating process and financial performance of all 12 active shallot collectors in Tambaksari Hamlet, Mojokerto, using a descriptive quantitative approach supported by qualitative data and a census design. Data were obtained through observation, structured interviews, factual questionnaires, and documentation. Cost-based profitability was measured using Return on Operating Cost (ROOC), while operating efficiency was assessed using the Revenue-Cost (R/C) ratio. Activities comprised purchasing, sorting, drying or storage, packaging, and distribution. After standardizing net profit as gross revenue minus total cost, mean ROOC was 31.79% (12.21-51.41%) and mean R/C was 1.32 (1.12-1.51). ROOC showed substantial dispersion (CV 49.23%), whereas by-product income contributed only 0.99% of aggregate gross revenue. The findings support tighter stage-based cost records, better inventory handling, and systematic use of intermarket price information.
Co-Authors Anam, Khoirul Dedy Sekarmaji Desy Ratnaningrum Ilyas Rifky Ramadhani Ni Dewi Ambal Ikka Nur Farida Kusumawati