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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Jurnal Ilmu Pertanian Indonesia Vegetalika Jurnal Ilmu Pertanian Agrointek Jurnal Pengkajian dan Pengembangan Teknologi Pertanian Journal of Degraded and Mining Lands Management AGRIVITA, Journal of Agricultural Science Indonesian Journal of Biotechnology Planta Tropika JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA Caraka Tani: Journal of Sustainable Agriculture Jurnal Biologi Tropis jurnal Ilmu Pertanian (Agricultural Science) Agroscript: Journal of Applied Agricultural Sciences Altifani Journal: International Journal of Community Engagement
Eka Tarwaca Susila Putra
Departemen Budidaya Pertanian, Fakultas Pertanian, Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Education Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Social Sciences

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Deciphering the signature of seedborne fungi linked to rice sheath rot disease: insights from ITS rDNA sequencing analysis Hoerussalam, Hoerussalam; Afifuddin, Ahmad; Lathif, Yudrik; Widiastuti, Ani; Putra, Eka Tarwaca Susila; Priyatmojo, Achmadi
Jurnal Hama dan Penyakit Tumbuhan Tropika Vol. 26 No. 1 (2026): MARCH, JURNAL HAMA DAN PENYAKIT TUMBUHAN TROPIKA: JOURNAL OF TROPICAL PLANT PE
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jhptt.126165-179

Abstract

Sarocladium oryzae and Fusarium spp. are the causal agents of sheath rot, a re-emerging rice disease that has recently gained importance in Indonesia and can cause yield losses of up to 85%. Both pathogens are seedborne, making their accurate identification and management essential. Conventional morphological identification is time-consuming and often inaccurate due to overlapping symptoms among fungal species. In this study, we demonstrated the seedborne transmission of sheath rot pathogens and provided novel insights by highlighting the predominance of F. equiseti and the detection of infections in asymptomatic seeds. A total of 75 fungal isolates were obtained from rice leaf sheaths, seeds, and harvested grains across CMS, inbred, and hybrid rice varieties. ITS rDNA sequencing identified 42 isolates as S. oryzae and 33 as Fusarium spp., including F. equiseti (29), F. incarnatum (1), and F. proliferatum (3). The detection of these pathogens in both pre-planting seed samples and post-harvest grains demonstrates their ability to spread through seeds. Importantly, their presence in asymptomatic seeds and grains indicates that routine visual inspection is insufficient for seed health monitoring.
Reduced enriched compost and fertilizer inputs improve soil properties and GP3 pineapple performance on degraded Ultisols Sari, Reny Mita; Putra, Eka Tarwaca Susila; Sulistyaningsih, Endang; Kurniasih, Budiastuti; Ziaurrahman, Ahmad
Journal of Degraded and Mining Lands Management Vol. 13 No. 2 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.132.10001

Abstract

This study evaluated whether reducing the dose of soil amendment and enriching it with vermicompost and biochar could maintain soil properties and support the growth of pineapple (Ananas comosus (L.) ‘GP3’) cultivated on degraded Ultisols. This experiment aimed to assess the effect of reducing the dose of soil amendment and decreasing the inorganic fertilizer application to 75% of the recommended dose on soil properties, nutrient uptake, and plant growth. The experiment used a split-plot design with varying doses of enriched compost combined with vermicompost and biochar, and two levels of inorganic fertilizer (75% and 100% of the recommended dose). Soil properties, nutrient uptake, and plant growth were measured and analyzed using Dunnett's test at ? = 0.05. The results showed that reducing the dose of enriched compost and decreasing the inorganic fertilizer by 25% generally resulted in soil properties, nutrient uptake, and plant growth comparable to those obtained using a higher dose of compost only and a full dose of inorganic fertilizer. Soil properties indicators generally remained stable across all treatments, with a small and transient decrease in soil nitrogen, which only occurred in the 25CVB1 treatment at later stages of plant growth. Although Ca and Mg uptake in the 25CVB3 treatment was lower at 4 months after planting, at 8 months after planting, the uptake levels were comparable across all treatments. These findings indicate that compost enriched with vermicompost and biochar allows for reduced doses of soil amendment and inorganic fertilizers without compromising soil quality or pineapple growth, thus providing a sustainable and cost-effective management strategy for pineapple cultivation on Ultisols.
Characteristics of soil salinity and its impact on rice yield of coastal rice fields in West Aceh Junita, Dewi; Kurniasih, Budiastuti; Putra, Eka Tarwaca Susila; Joko, Tri; Pazi, Ahmad Mustapha Mohamad
Journal of Degraded and Mining Lands Management Vol. 13 No. 2 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.132.10115

Abstract

Increasing soil salinity led to a decline in rice yield, particularly in the coastal areas of West Aceh affected by the 2004 tsunami. This study aimed to examine the characteristics of soil salinity in the coastal rice fields of West Aceh during the rainy and dry growing seasons, and to evaluate its impact on rice yield. Soil sampling was conducted using purposive sampling during two growing seasons: the dry growing season (April-September 2024) and the rainy growing season (October 2024-March 2025). Clustering analysis showed that three clusters (sodic and saline-sodic) formed during the dry season, while two clusters (sodic and non-saline non-sodic) formed during the rainy season. The Suak Pante Breuh site changed cluster membership, being sodic in the dry season and non-saline non-sodic in the rainy season. Among all soil chemical properties, soil electrical conductivity (EC) and sodium adsorption ratio (SAR) showed the strongest negative correlations with rice yield, particularly during the dry growing season (r = -0.55; r = -0.50). This study found that rice yield was more affected by salinity than by sodicity. This was illustrated in the Suak Timah 5 site, which was classified as sodic during the rainy season but showed similar rice yields to non-saline and non-sodic sites. In contrast, during the dry season, this site was classified as saline–sodic and recorded lower rice yields than other locations that were classified as sodic.
Growth Responses of Sugarcane (Saccharum officinarum L.) Ratoon Cane to Vegetative Phase and Sugarcane Formula Fertilizer in Inceptisol Pradana, Yogi Wahyu; Putra, Eka Tarwaca Susila; Irwan, Siti Nurul Rofiqo
Jurnal Ilmu Pertanian Vol 11, No 1 (2026): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.108887

Abstract

Sugar demand is rising with population growth, and although sugar production increased from 2018 to 2022, it has not met national demand. To boost national sugar production, proper fertilizer management is crucial. By calculating and applying compound fertilizer formulations tailored to the specific needs of sugarcane, fertilization efficiency, productivity, and sugar yield can be enhanced. This research aimed to evaluate the performance of morphological characteristics of ratoon sugarcane in response to NPK nutrient management using specific fertilizer formulations. The field study was conducted in Sleman, Special Region of Yogyakarta, from September 2023 to December 2024. The experiment was arranged in a randomized complete block design (RCBD) with three treatments, consisting of NPKSZn (15-15-15-9-0.2) at 400 kg ha⁻¹ + ZA (21N-24S) at 600 kg ha⁻¹ (control); NPKS (14-9-18-4) at 1000 kg ha⁻¹ (Formulation 1); and NPK (23-7-14) at 1000 kg ha⁻¹ (Formulation 2), and four blocks as replications. The collected data were analyzed using Analysis of Variance (ANOVA) at a 5% significance level, followed by the Least Significant Difference (LSD) test at α = 5% to determine the most effective fertilizer formulation. The results showed that the application of these fertilizer formulations significantly affected stalk diameter, millable cane yield and brix content. These findings highlight the importance of synchronized vegetative phase fertilization to optimize ratoon cane growth and support sustainable sugarcane production in Inceptisol soils.
Growth Responses of Sugarcane (Saccharum officinarum L.) Ratoon Cane to Vegetative Phase and Sugarcane Formula Fertilizer in Inceptisol Pradana, Yogi Wahyu; Putra, Eka Tarwaca Susila; Irwan, Siti Nurul Rofiqo
Jurnal Ilmu Pertanian Vol 11, No 1 (2026): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.108887

Abstract

Sugar demand is rising with population growth, and although sugar production increased from 2018 to 2022, it has not met national demand. To boost national sugar production, proper fertilizer management is crucial. By calculating and applying compound fertilizer formulations tailored to the specific needs of sugarcane, fertilization efficiency, productivity, and sugar yield can be enhanced. This research aimed to evaluate the performance of morphological characteristics of ratoon sugarcane in response to NPK nutrient management using specific fertilizer formulations. The field study was conducted in Sleman, Special Region of Yogyakarta, from September 2023 to December 2024. The experiment was arranged in a randomized complete block design (RCBD) with three treatments, consisting of NPKSZn (15-15-15-9-0.2) at 400 kg ha⁻¹ + ZA (21N-24S) at 600 kg ha⁻¹ (control); NPKS (14-9-18-4) at 1000 kg ha⁻¹ (Formulation 1); and NPK (23-7-14) at 1000 kg ha⁻¹ (Formulation 2), and four blocks as replications. The collected data were analyzed using Analysis of Variance (ANOVA) at a 5% significance level, followed by the Least Significant Difference (LSD) test at α = 5% to determine the most effective fertilizer formulation. The results showed that the application of these fertilizer formulations significantly affected stalk diameter, millable cane yield and brix content. These findings highlight the importance of synchronized vegetative phase fertilization to optimize ratoon cane growth and support sustainable sugarcane production in Inceptisol soils.
Implementation of Good Agricultural Practices (GAP) to Increase the Productivity of Smallholder Oil Palm Farmers around PT UAM in Besulutu and Pondidaha Subdistricts, Konawe Regency Alam, Syamsu; Putra, Eka Tarwaca Susila; Iswandi, R Marsuki; Khaeruni, Andi; Hamzah, Awaluddin; Alwi, La Ode; Sudarmo, Hadi
Altifani Journal: International Journal of Community Engagement Vol. 6 No. 1 (2026): Altifani Journal: International Journal of Community Engagement
Publisher : Universitas Muhammadiyah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/altifani.v6i1.1713

Abstract

Smallholder oil palm plantations play an important role in supporting the economy of the community in Konawe Regency, particularly in the Besulutu and Pondidaha districts. The productivity of smallholder oil palms is often not optimal because most farmers still use cultivation techniques that do not meet standards. Therefore, the community service team of the Faculty of Agriculture, Halu Oleo University took the initiative to collaborate with the Faculty of Agriculture, Gadjah Mada University to carry out extension activities regarding Good Agricultural Practice (GAP) as an environmentally friendly, efficient, and sustainable cultivation approach. This activity aims to improve the understanding and skills of oil palm farmers in managing their plantations so that their harvests are of higher quality and more productive. The activity was carried out in a participatory manner through several stages. In the preparation stage, the team coordinated with stakeholders, identified farmers' needs, and prepared extension materials. The next stage was the extension itself, which consisted of material presentations, interactive discussions, and field visits. Next, the evaluation stage was carried out using pre-tests and post-tests to assess the increase in farmers' knowledge after participating in the activity. The evaluation results showed an increase in knowledge, with an average post-test score of 90 compared to a pre-test score of 54. These findings indicate that extension activities are effective in improving farmers’ understanding of GAP principles. However, the measurable impact of these activities is still limited to increased knowledge and does not yet include improved crop yields. Therefore, continued support is needed to encourage the implementation of GAP, which will have a positive impact on the productivity and sustainability of smallholder oil palm farming.
Co-Authors Achmadi Priyatmojo Aditya Herwin Dwiputra Ageng Kaloko Ahmad Afifuddin Ahmad Mustapha Mohamad Pazi, Ahmad Mustapha Mohamad Alam, Taufan Aldy Slamet Riyadi Alpandari, Heny ANDI KHAERUNI Andi Nur Cahyo Anggraeni Marganingsih Ani Widiastuti, Ani Annisa Khoiriyah Aprilia Ike Nurmalasari Arief Rahman Arizal Nur Hardiansyah Aryo Wijayanto Awaluddin Hamzah Ayu Ainullah Muryasani Bambang Suwignyo Benediktus Dimas Surya Wirawan Benito Heru Purwanto Benny W.P. Brian Krisna BUDI SETIADI DARYONO Budiastuti Kurniasih Cahyo Wulandari Canggih Nailil Maghfiroh Deborah Gita Sakinah Dewa, Didik Indra Dewi Hs, Endang Sri Dewi, Fransisca Christiana DIAH RACHMAWATI Didik Indra Dewa Didik Indra Dewa Didik Indradewa Didik Indradewa Didik Indradewa Didik Indradewa Didik Indradewa Dody Kastono Dwi Nur Shinta Febriani Dyah Weny Respatie Eka Listia Eko Hanudin Eko Hanudin Eko Hanudin Endang Sulistyaningsih Farrasati, Rana Garusti, Garusti Hadi Sudarmo Hoerussalam, Hoerussalam Hutagalung, St Novella Angelica Ika Betty Widyastuti Ika Betty Widyastuti Ika Irmayanti JAKA WIDADA Kaloko, Ageng Kartikawati, Rina Khairi, Alfassabiq Kurniasih, Budiastuti La Ode Alwi Lathif, Yudrik Lilis Suryani Maghfiroh, Canggih Nailil Meksy Dianawati Melisa Melisa Muchammad Ambar Huda Muhdan Syarovy Nasrudin Nasrudin Novi Yulanda Sari Nurwita, Ardian Nuzul Hijri Darlan Okti Wulandari Pradana, Yogi Wahyu Pradiko, Iput Pradina Yenny Novitasari Prapto Yudono Prapto Yudono Prapto Yudono Prapto Yudono Prapto Yudono Prapto Yudono Prasetiyanto, Lukas Priyo Prianto, Sukirno Dwiasmoro Priyono Suryanto Purnomo Purnomo Putra, Sukmana Siswandana R Marsuki Iswandi, R Marsuki R. Sapto Hendri Boedi Soesatyo Ramces Sitohang Ramot Christian Ratnasani Ambarwati Siniwi Resti Utari Wahyudi Riyadi, Aldy Slamet Roberdi, Roberdi Rohlan Rogomulyo Rohman, Randi Abdur Rudi Hari Murti Ruslan Boy Sari, Reny Mita Sarlin Kusumaningrum Satiti Ratnasari Sigit Dwi Maryanto Silmia, Betha Siti Nurul Rofiqo Irwan Siti Subandiyah Sri Trisnowati Sriyanto Waluyo Sriyanto Waluyo Sujadi Sujadi Sumaryanto Sumaryanto, Sumaryanto Supriyanta Supriyanta Suryana Riski Siregar Sutan Tarmizi Lubis SYAMSU ALAM Syarif, Afiya Nadhifah Thirafi, Dhaffa Agung Tohari Tohari Tohari Tohari Tony Liwang Toyip Toyip Tri Joko Tri Rini Nuringtyas Tri Utami Utomo, Condro Valentina Dwi Suci Handayani Widyastuti, Ika Betty Ziaurrahman, Ahmad