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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Buletin Agrohorti Jurnal Ilmu Pertanian Indonesia Jurnal Ilmu Pertanian International Journal of Science and Engineering (IJSE) Journal of Tropical Soils JURNAL ILMU PERTANIAN Journal of Degraded and Mining Lands Management Jurnal Sumberdaya Alam dan Lingkungan AGRIVITA, Journal of Agricultural Science Indonesian Journal of Physics and Nuclear Applications Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Jurnal Penelitian Kelapa Sawit Journal of Tropical Crop Science JURNAL PERTANIAN jurnal Ilmu Pertanian (Agricultural Science) Perbal: Jurnal Pertanian Berkelanjutan Journal of Agrosociology and Sustainability
Herdhata Agusta
Department Of Agronomy And Horticulture, Bogor Agricultural University (IPB University), Bogor, West Java, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Energy Engineering Environmental Science Medicine & Pharmacology Physics Veterinary

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Reducing the Use of Diuron-Active Herbicides Using a Combination of Wood Vinegar from Lignocellulosic Waste in Pineapple Plantations Yosua Pratama Simangunsong; Herdhata Agusta; Mochamad Hasjim Bintoro Djoefrie
Journal of Tropical Crop Science Vol. 13 No. 02 (2026): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.13.02.395-406

Abstract

Pineapple waste, which is rich in lignocellulosic compounds, can be thermally converted into environmentally friendly bioherbicides. This study aimed to evaluate the potential of lignin-derived compounds from lignocellulosic waste as a bioherbicide and to identify an effective formulation for reducing the use of diuron-based herbicides in pineapple plantations. Pyrolysis was conducted at subcritical temperatures, and the resulting wood vinegar was analyzed by GC MS to identify phenolic compounds. Pyrolysis at 250–300 °C produced phenolic compounds accounting for 40.20% of the chromatogram area, while pyrolysis at 400–450 °C produced 49.61%. The efficacy test included several treatments: pyrolysis products from 400–450 °C at 5% and 10%, pyrolysis products from 250 350 °C at 5% and 10%, diuron herbicide at 0.5 g/L, combinations of herbicide with two selected pyrolysis products, and a standard diuron application as the control. The results showed that wood vinegar produced at 400–450 °C and applied at 10% could suppress seed bank germination, with an effectiveness comparable to that of diuron at 0.5 g/L. This wood vinegar formulation was then used in a second efficacy test under pineapple cultivation conditions to assess whether diuron use could be reduced when combined with wood vinegar. The results indicated that combining 70% herbicide with 10% wood vinegar suppressed weed growth to a level similar to the 100% herbicide standard treatment. This study may serve as a reference for reducing the use of synthetic herbicides in pineapple cultivation.
Production and Chemical Characterization of Biochar–Fly Ash Enriched Compost for Tropical Acid Soil Ameliorant Herdhata Agusta
JOURNAL OF TROPICAL SOILS Vol. 31 No. 3: September 2026 (in Progress)
Publisher : UNIVERSITY OF LAMPUNG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5400/jts..v31i3.%p

Abstract

Pineapple cultivation systems are produced in large quantities but are not optimally utilized. One widely used source of organic matter is compost. Biochar has received considerable attention as a functional amendment in the composting system. In addition to biochar, fly ash – a byproduct of coal combustion in thermal power plants – has emerged as a potential mineral additive for composting systems. The evaluation included temperature dynamics during production, moisture content, pH, N-total, C/N ratio, and macronutrient content at a predetermined observation time. The trial was structured using a single-factor Group Random Design with seven formulas and four replicates. Treatments A, B, and C are made by mixing biochar and FA into compost raw materials at the beginning of the composting process, with a composition of 75% compost raw materials + 20% biochar + 5% FA, 75% compost raw materials + 12.5% biochar + 12.5% FA, and 75% compost raw materials + 5% biochar + 20% FA. Treatment D consists of 100% compost raw materials without the addition of biochar and FA. Meanwhile,  the E, F, and G treatments are made by mixing biochar and FA into mature compost, with a composition of 75% compost + 20% biochar + 5% FA, 75% compost + 12.5% biochar + 12.5% FA, and 75% compost + 5% biochar + 20% FA. The treatment of 75% compostable raw materials, 5% biochar, and 20% fly ash at the beginning of the composting process shows the greatest potential balance, combining early enrichment with a high macronutrient content, an appropriate pH, and a final C/N ratio.
Indeterminasi Sekuensial Pembungaan dan Ketidakmampuan Produksi Kedelai di Lapang Akibat Penambahan Cahaya Kontinu pada Kondisi Terbuka dan Ternaungi Herdhata Agusta; Imam Santoso
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 33 No. 3 (2005): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (246.919 KB) | DOI: 10.24831/jai.v33i3.1261

Abstract

Additional continuous light (photoperiod of 24 hours/day) with irradiation value of 0.61 cal/cm2/minute and illumination value of 59 lux was able to suppress the development of flowering, pod building, grain filling and the production of soybean variety Bromo,  so that the sum of flowers, pods and grain production dropped and reached to null value.   However, the plant height increased with remarkable measurement from normally 78.0 cm to be 193.2 cm.  At the later condition the plant lodged and crept.  Due to additional continuous light irradiation at value of 0.03 cal/cm2/minute with average illumination value of 17 lux, the grain production was still null ton/ha.  However, the formed flowers and pods were not well developed.  At very little additional continuous light irradiation at the value of 0.01 cal/cm2/minute with illumination value of  2 lux, soybean production reached only 0.72 tons/ha, which at the normal condition it was able to produce grain legumes in amount to 1.53 tons/ha.  Light shading at the level of 56% could not improve the negative effect of the additional continuous light excess, so that the grain production was not much better.  However, grain production was either not reduced significantly due to the light shading.  It showed that the soybean is well tolerant against the shading treatment at this additional light condition.   Key words :  light, shading, soybean, air carbon dioxide, photoperiod  
Co-Authors Abdul Qadir Abdul Roni Angkat Ade Wachjar AHMAD JUNAEDI Ahmad Zamzami Aiyen Tjoa Al Haq, Muhammad Izzuddin Al Hayah, Cauny Nur Alma Wahyuningrum Andi Besse Poleuleng Anung Wahyudi Ayulia, Liska Bintoro Djoefrie , Mochamad Hasjim Bintoro Joefrie Bobot Sudoyo Dewi Riniarti Diaguna, Ridwan Djoefrie, M.H.B. Dulbari, Dulbari Dwi Asmono Dwi Asmono Dwi Guntoro Edi Santosa Eka Maulidiya, Sherly Eko Sulistyono Fajar Ilhamy, Muhammad Rizki Feni Shintarika Fredinan Yulianda Gani Tarigan, Abdul Gani Gatot Pramuhadi Hariyadi Ilyas Marzuki IMAM SANTOSO Irzal Effendi Jumena Adijaya Kurniati Kurniati Limin, Atfritedy M Juhri Al Karomah Masluki, Masluki Melik Thiara Dikari Memen Surahman Mercy Bientri Yunindanova Mercy Bientri Yunindanova Miftahurridho, Muhammad Toha Mochamad Hasjim Bintoro Djoefrie Muhamad Rafiansyah Siregar, Valdi Muhammad Hasjim Bintoro Djoefrie Hasjim Bintoro Djoefrie Nani Panca Dewi Manu Hara Karti Putri, Anita Hazimah Risa Wentasari Rosita Dewi S Siswanto Sandra A. Aziz Santosa , Edi Sari, Anis Widia Sidiq, Egi Nur Muhamad Siswahyudianto Sridanti, Irma Lisa Stefano, Indra Mario Sudarsono Sudirman Yahya Sudradjat Sudradjat Sudradjat Sudrajat Sudrajat Supiandi Sabiham Suwarto Suwarto Syaiful Anwar Tambunan, Elsass Riela TRI ASTUTI Triadiati Triadiati Ulfha Junita ummah, kuntum khaira Waraqi, Bismo Yan Sukmawan, Yan Yonny Koesmaryono Yosua Pratama Simangunsong Zadzali, Helmi Zaman, Sofyan