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All Journal Partner Jurnal Penelitian Pertanian Terapan Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Media Ekonomi
Koylal, Johny Agustinus
Jurusan Manajemen Pertanian Lahan Kering, Politeknik Pertanian Negeri Kupang
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Economics, Econometrics & Finance Engineering Environmental Science Immunology & microbiology Social Sciences Veterinary Other

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A Effect of Straw and Cattle Manure Ratio on Bokashi Quality Based on C/N Balance and Nutrient Availability Yason Edisson Benu; Jemseng Carles Abineno; Marvin Jecson Pandu; Johny Agustinus Koylal; Micha Snoverson Ratu Rihi
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 3 (2026): June 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i3.1143-1151

Abstract

Bokashi is an anaerobically fermented organic fertilizer whose quality depends on the balance between carbon-rich and nitrogen-rich feedstocks. This study evaluated five bokashi formulations prepared from different proportions of leaf straw (JD) and cattle manure (PK), namely: JD100, JD75PK25, JD50PK50, JD25PK75, and PK100. Bokashi was fermented under anaerobic conditions for 21 days and assessed for temperature, moisture content, pH, organic carbon, C/N ratio, total nitrogen, P₂O₅, K₂O, and magnesium (Mg). The experiment was arranged in a Completely Randomized Design, while treatment performance was evaluated using descriptive statistics, including mean ± standard deviation, coefficient of variation, and trend analysis. Results showed that increasing the proportion of manure generally enhanced nutrient availability. Total nitrogen increased from 1.54% in JD100 to 2.72% in JD25PK75, while Mg concentration increased from 3,506 mg kg⁻¹ in JD100 to 10,999 mg kg⁻¹ in PK100. In contrast, straw-dominated formulations maintained higher organic carbon content (27.86%) and more neutral pH conditions (7.7). The C/N ratio declined from 18.10 in JD100 to 8.72 in PK100, indicating greater decomposition and compost maturity. Among the treatments, JD50PK50 exhibited comparatively balanced characteristics, combining relatively high organic carbon, moderate nutrient levels, near-neutral pH (6.8), and a moderate C/N ratio (11.48). These findings suggest that balanced straw–manure mixtures can improve bokashi maturity, nutrient retention, and chemical stability for sustainable organic fertilizer production.
The Impact of Macro Economic Variables on the Exchange Rate of Large Ruminant Livestock Farmers in East Nusa Tenggara: An Analysis of the Time Series 2008-2022 johny agustinus koylal; Stefanus M. Kuang; Jamseng C. Abineno
Jurnal Penelitian Pertanian Terapan Vol 24 No 4 (2024)
Publisher : Politeknik Negeri Lampung.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25181/jppt.v24i4.3636

Abstract

This study aims to examine the effects of inflation, loan interest rates, labor, and exchange rates on the exchange rate of large ruminant cattle farmers in East Nusa Tenggara and the development of the exchange rate achievement rate of large ruminant cattle farmers for the period 2008-2022. The data used in this study is time series data for the period 2008-2022 obtained from the Central Statistics Agency. The analysis method used is a multiple regression model with software econometric views 12 and a quantitative descriptive method. The research variables include the exchange rate of large ruminant farmers, inflation, loan interest rates, labor, and exchange rates. The results of the analysis show that inflation, loan interest rates, and exchange rates have a significant effect on the exchange rate of large ruminant farmers. The purchasing power and welfare of East Nusa Tenggara farmers are relatively low nationally but have a higher average growth.
Co-Authors Jamseng C. Abineno Jemseng C. Abineno Jemseng Carles Abineno Marvin Jecson Pandu Micha Snoverson Ratu Rihi Stefanus Markus Kuang Yason Edisson Benu