https://e-journal.uniflor.ac.id/index.php/Agr/issue/feedAGRICA2025-05-21T18:02:38+07:00Dr. Sriwahyunisriwahyuni4611@gmail.comOpen Journal Systems<p><strong>Agrica: Journal of Sustainable Dryland <em>Agriculture </em></strong>is a journal that presents a platform for sharing knowledge in science and technology related to Sustainable Dryland Agriculture. Its studies are agronomy, pest and plant diseases, soil science, agricultural conservation and ecology, organic farming, agrobiodiversity, agrotourism, and permaculture covering the economic aspects of dryland sustainable agriculture (agribusiness, agricultural socio-economic, agroindustry), agricultural diversification, land and water conservation, agricultural climate, food security, animal welfare concept, mechanization, science and food technology in a dryland environment</p>https://e-journal.uniflor.ac.id/index.php/Agr/article/view/5664PEMBERDAYAAN MASYARAKAT SEKTOR PERTANIAN BERKELANJUTAN TERHADAP PENDAPATAN PETANI DESA PENYANGGA: TINJAUAN LITERATUR2025-05-16T07:35:47+07:00Christin Yudith Wahyuni Ngga'achristin.yudith.wahyuni-2023@feb.unair.ac.idTri Haryantotri.h@feb.unair.ac.id<p><em>Poverty and low productivity of agricultural businesses in buffer villages are two interrelated conditions, including the suboptimal increase in income in the buffer villages of the Kelimutu National Park Area. Various empowerment programs are expected to improve these conditions. This article aims to review the socio-economic aspects of farmers that influence the increase in farmer income in the buffer village. This study seeks to understand the essence of the entity so that it can underlie policies that improve conditions and indicators that will be used to measure conditions for good policy making. The study method uses literature studies for conceptual studies and journal reviews from Scopus, Google Scholar, ScienceDirect, Frontiers and Sinta-accredited journals, as well as secondary data. Defining the nature, characteristics and essence of scientific and socio-economic aspects of increasing income from the farmer's perspective is very necessary to reveal the essential aspects for increasing this income. The results of the study reveal that the economic empowerment of communities and agricultural income in buffer villages includes dimensions of access to land resources, capital and technology, increasing farmer capacity in the form of training and mentoring, developing farmer institutions in farmer group forums, implementing sustainable agricultural practices in the form of organic fertilisers, and land conservation and government policies.</em></p>2025-05-30T00:00:00+07:00Copyright (c) 2025 Christin Yudith Wahyuni Ngga'a, Tri Haryantohttps://e-journal.uniflor.ac.id/index.php/Agr/article/view/3775FAKTOR-FAKTOR YANG MEMPENGARUHI PERILAKU KONSUMEN TERHADAP KEPUTUSAN PEMBELIAN AYAM POTONG MERAUKE DI PASAR WAMANGGU DISTRIK MERAUKE KABUPATEN MERAUKE2024-11-20T06:18:03+07:00Imam Fibiantoroineke_nw@unmus.ac.idIneke Nursih Widyantariineke_nw@unmus.ac.idNurliah Nurliahineke_nw@unmus.ac.id<p><em>Wamanggu Market, the largest trading center in Merauke District, is under the careful management of the local government. This ensures that the market operates smoothly and efficiently, offering a variety of commodities and attracting numerous sellers and buyers, particularly those interested in broiler meat. For consumers purchasing broiler meat, there are several key considerations to keep in mind, such as color, weight, and meat elasticity. The research was conducted over two months, January to February 2023, to identify the variables that influence the behavior of slaughter chicken buyers. This study is quantitative descriptive. The place of research is Wamanggu Market. The research population is residents of Merauke District. The number of samples taken was 44 chicken buyers were taken purposively. The research data included primary data obtained by conducting interviews, observations, and questionnaires and secondary data obtained from literature, the internet, and BPS. The data analysis used in the research is multiple linear regression. The study found that cultural, personal, and psychological factors influence buying broiler chicken. However, psychological factors are the most influential factor in buying broiler meat.</em></p>2025-03-16T00:00:00+07:00Copyright (c) 2025 Imam Fibiantoro, Ineke Nursih Widyantari, Nurliah Nurliahhttps://e-journal.uniflor.ac.id/index.php/Agr/article/view/5057AGRIBISNIS PADI MERAH CENDANA DALAM MENINGKATKAN KEUNGGULAN KOMPETITIF PETANI2025-01-02T16:18:08+07:00Ni Putu Sukanteriputusukanteri@unmas.ac.idLuh Gede Panca Dewiputusukanteri@unmas.ac.idI Made Budiasaputusukanteri@unmas.ac.idLuh Putu Kirana Pratiwiputusukanteri@unmas.ac.id<p>Abstract</p> <p><em>The rice commodity is the main food of the Indonesian people which requires its availability all the time. In line with population growth. Tabanan Regency as a rice producer, especially Jatiluwih Village, Penebel District, is known as an area that produces several types of rice. The rice variety cultivated in the Jatiluwih area is the Jatiluwih Cendana Red Rice variety. The objectives of this research are: To analyze the structure of red rice supply chain activities in Jatiluwih Village. To analyze the competitive advantage of red rice in Jatiluwih Village. The research method used competitive analysis at UD WS Jatiluwih with 13 respondents consisting of farmers, millers and</em> <em>marketers of Cendana red rice. The results of the research show that the supply chain structure for local rice (Cendana red rice) in Jatiluwih Village is: Local rice varieties in Jatiluwih Village are proven to have a relatively high competitive advantage compared to superior rice varieties (Ciherang varieties). Socially, the competitiveness of local varieties of rice is demonstrated by the high position of local varieties among society as consumed by middle and upper class people. Economically, the competitive advantage of local varieties of rice is shown by the relatively high selling price compared to superior varieties.</em></p>2025-03-18T00:00:00+07:00Copyright (c) 2025 Ni Putu Sukanteri, Luh Gede Panca Dewi, I Made Budiasa, Luh Putu Kirana Pratiwihttps://e-journal.uniflor.ac.id/index.php/Agr/article/view/3826UJI PERTUMBUHAN DAN HASIL TANAMAN SAWI HIJAU (Brassica juncea L.) MELALUI TAKARAN BIOCHAR SEKAM PADI DAN WAKTU APLIKASI LIMBAH CAIR TAHU2025-03-14T20:59:40+07:00Deseriana Briadeserianabria@gmail.comEduardus Yosef Neonbenideserianabria@gmail.comStefanus Kehideserianabria@gmail.com<p><em>Mustard greens (Brassica junc</em><em>ea </em>L<em>.) are a </em><em>vegetable </em><em>crop that is popular with many people but is experiencing a decline in production.</em><em> Mustard greens (Brassica junc</em><em>ea</em><em> L.) are a </em><em>vegetable</em><em> crop that is popular with many people but is experiencing a decline in</em> <em>production.</em> <em>This problem is caused by a lack of water, less intensive cultivation techniques and a decrease in soil fertility. </em><em>This research was carried out with the aim of finding out the effect of the rice husk biochar dosage and the optimal application time for tofu liquid waste to increase the growth and yield of the Tosakan F1 variety of green mustard greens</em><em>. The research was carried out from June to July 2023 at the Faculty of Agriculture, University of Timor, Sasi Village, South Bikomi District, North Central Timor Regency. </em><em>The polybag experiment was arranged according to a 3 x 3 factorial completely randomized design (CRD) which was repeated 3 times, consisting of 2 factors, namely: the first factor was the dose of rice husk </em><em>biochar</em><em>, namely; without biochar, rice husk biochar dosage (7%), rice husk biochar dosage (14%).</em> <em>Meanwhile, the second factor is the application time for tofu liquid waste, namely: without time limit, once every 6 days, once every 12 days, which is repeated 3 times so that there are 27 experimental unit. The results of the research showed that there was an interaction between the 7% rice husk biochar treatment and the application of tofu liquid waste once every 12 days on the leaf number parameter of 21 HST. A dose of 7% rice husk biochar can increase the growth and yield of mustard greens, namely the parameters of plant height (24.00 cm), number of leaves (16.00), leaf area (690.90 cm2), plant fresh weight (75.99 grams). ) and harvest index (87.81%). Application of tofu liquid waste once every 12 days can increase plant height (22.88cm), number of leaves (15.00 pieces), leaf area (691.33 cm2), plant fresh weight (76.35 grams), and harvest index (88.74 %).</em></p>2025-05-17T00:00:00+07:00Copyright (c) 2025 Deseriana Bria, Eduardus Yosef Neonbeni, Stefanus Kehihttps://e-journal.uniflor.ac.id/index.php/Agr/article/view/5041IDENTIFIKASI JAMUR PENYEBAB PENYAKIT BUSUK BATANG ANGGREK DAN UJI PATOGENISITASNYA PADA BEBERAPA GENUS ANGGREK2025-04-28T14:11:53+07:00I Gusti Putu Semara Putrasemaraputra0911@gmail.comGusti Ngurah Alit Susanta Wiryasemaraputra0911@gmail.comI Putu Sudiartaputusudiarta@unud.ac.id<p><em>Plant pests and diseases are barriers to orchid cultivation. These pests and diseases can harm and even destroy cultivated orchids, resulting in losses for producers. This study aims to identify and test fungal infections that cause stem rot in Dendrobium sp., Vanda sp., and Phalaenopsis sp. orchids. The study was carried out at Udayana University's Plant Disease Laboratory, Plant Protection Concentration, Agroecotechnology Study Program, and Faculty of Agriculture. The Fusarium fungus was discovered to be the primary cause of stem rot in Dendrobium sp. marcophyllum orchids after sampling them. The application of Fusarium fungus to three orchid genera, Dendrobium sp., Vanda sp., and Phalaenopsis sp., revealed that Phalaenopsis sp. orchids experienced a significant increase in infection percentage, beginning at 20% in the first week and peaking at 70% in the fifth week, indicating a high susceptibility to the disease. Meanwhile, Dendrobium sp. showed a steadier infection rate, beginning at 10% in the first week and progressively growing to 40% by the fifth week. Vanda sp. exhibited the lowest infection rate, rising from 10% in the first week to 20% by the fifth week, demonstrating a significantly greater resistance than the other two species.</em></p>2025-05-18T00:00:00+07:00Copyright (c) 2025 I Gusti Putu Semara Putra, Gusti Ngurah Alit Susanta Wirya, I Putu Sudiartahttps://e-journal.uniflor.ac.id/index.php/Agr/article/view/4947ANALISIS KOMPARATIF PENDAPATAN PETANI KELAPA SAWIT SWADAYA TERHADAP POLA KONSUMSI PADA UMUR TANAMAN PRODUKTIF DAN NON PRODUKTIF DI DESA SUNGAI RENGIT KABUPATEN BANYUASIN2024-12-11T08:10:23+07:00Aisyah Absharinaceisyamuazaraprasetya@gmail.comRatih Lestariaaisyahabsharina@gmail.com<p><em>Palm oil is one of the plantation commodities that play an important role in the Indonesian economy. Banyuasin Regency is currently the largest supplier of palm oil. This study aims to analyze the contribution of independent palm oil income to the total revenue of farmer families in productive and non-productive crops, as well as to analyze the differences in farmer consumption patterns at the age of productive and non-productive crops in Sungai Rengit Village, Banyuasin Regency. This research was conducted in Sungai Rengit Village, Banyuasin Regency, from July 2021 to June 2022 using primary data collected through interviews using questionnaires. A total of 80 independent farmers, consisting of 40 productive and 40 non-productive crop farmers, were selected purposively. Data analysis was carried out using t-tests and descriptive statistics. The results of the study showed that the income of oil palm farmers was influenced by other business income. Farmers' consumption patterns show that farmers' welfare, both in productive and non-productive groups, is classified as prosperous based on the proportion of food and non-food consumption expenditure, where 40.49 percent of the portion is used for food needs and 59.51 percent for non-food needs. Meanwhile, oil palm farmer households with non-productive trees also have a balanced consumption mapping, with 40.86 percent used for food needs and 59.14 percent used for non-food consumption.</em></p>2025-05-18T00:00:00+07:00Copyright (c) 2025 Aisyah Absharina, Ratih Lestarihttps://e-journal.uniflor.ac.id/index.php/Agr/article/view/5337IDENTIFIKASI PENYAKIT PADA TANAMAN PADI DI KELURAHAN OESAO, KABUPATEN KUPANG, NUSA TENGGARA TIMUR2025-04-29T09:25:06+07:00Agnes V Simamoraasimamora@staf.undana.ac.idMayavira V Hahulymayavira.hahuly@staf.undana.ac.idLily F Ishaqi-ishaq@staf.undana.ac.idPetronella S Nenotekpetronella.nenotek@staf.undana.ac.idAntonius R B Olaantonius.ola@staf.undana.ac.idEvert Y Hosangyulianeshosang@yahoo.co.idBayu Refindra Fitriadibayurefindra@pertanian.go.id<p>Rice is one of the primary food crops that plays a vital role in improving the welfare of Indonesian society. However, crop failures often occur, one of which is caused by pathogen attacks. This study aimed to identify the types of pathogens affecting rice plants in Oesao Village, Kupang Timur District, Kupang Regency. The research was conducted from February to April 2024. Samples of diseased rice plants were collected from Oesao Village, while the isolation and identification processes were carried out at the Microbiology Laboratory, Faculty of Agriculture, Univesitas Nusa Cendana. The study utilized the diagonal sampling method by selecting five points within a paddy field and observing plants showing disease symptoms. Diseased plant parts were examined, photographed, sampled, and brought to the laboratory for pathogen isolation and identification. The results identified five types of pathogens infecting rice plants: <em>Alternaria padwickii</em> (causing circular leaf spots), <em>Curvularia sp.</em> (causing brown leaf spots), <em>Drechslera oryzae</em> (causing leaf spots), <em>Fusarium oxysporum</em> (causing stem spots), and <em>Fusarium sambucinum</em> (causing root rot). Interviews with farmers revealed that these pathogens significantly contribute to the decline in rice production in Oesao. These findings are crucial for developing pathogen control strategies in rice cultivation to enhance yield and food security in Indonesia, particularly in Oesao and its surrounding areas<em>.</em></p>2025-05-18T00:00:00+07:00Copyright (c) 2025 Agnes V Simamora, Mayavira V Hahuly, Lily F Ishaq, Petronella S Nenotek, Antonius R B Ola, Evert Y Hosang, Bayu Refindra Fitriadihttps://e-journal.uniflor.ac.id/index.php/Agr/article/view/5394PENGARUH KEMIRINGAN LERENG TERHADAP KUALITAS TANAH PADA PERTANAMAN NILAM DI KECAMATAN WOLASI, KABUPATEN KONAWE SELATAN 2025-05-06T09:52:08+07:00Darwis Sulemandarwissuleman.61@gmail.comSyamsu Alamalamhaluoleo@gmail.comLa Ode Rustamld.rustam@yahoo.comDewi Nurhayati Yusufwafa.yusuf88@gmail.com<p><em>The slope gradient is one of the critical factors influencing soil functions through erosion, transportation and soil sedimentation. The general objective of this study was to evaluate the change of soil quality at different slopes gradient and specifically to prepare a soil quality data base as a reference for making sustainable land use policies. This study used a systematic free survey method in which the sample points were determined purposively based on the slope gradient, namely 0-8% and 8-15%. Three sample points were set up at each slope gradient comprising 4 subsamples each and then composited, so that 9 composite samples were obtained. Soil properties observed include texture, pH, organic C, total N, available P and K. The results highlighted that the soil organic C, total N and available K at 0-8% slope gradient increased by 88.25%, 29.87% and 10.53% respectively compared to the 8-15% slope gradient. The Soil Quality Index (SQI) at 0-8% and 8-15% slopes gradient was recorded by 0.70 (good) and 0.60 (moderate), respectively. It was observed a decline in organic C and total N as well as available K with an increasing of slope gradient. Therefore, it is highly recommended to practice a conservation planting system to avoid a decline in soil quality in the future.</em></p>2025-05-19T00:00:00+07:00Copyright (c) 2025 Darwis Suleman, Syamsu Alam, La Ode Rustam, Dewi Nurhayati Yusufhttps://e-journal.uniflor.ac.id/index.php/Agr/article/view/5603ANALISIS STRATEGI KONSERVASI TANAH DI LAHAN PERTANIAN DAERAH ALIRAN SUNGAI BRIBIN GUNUNGKIDUL2025-05-12T09:40:12+07:00Lintang Panjali Siwi Pambayunlintang.panjali@ugk.ac.idAdiprasetya Widyatamaadiprasetya210@gmail.com<p><em>Watershed is an area that has great potential for degradation. Degraded land is characterized by the loss of topsoil due to erosion. Understanding land sensitivity to erosion plays a crucial role in determining effective soil conservation methods to prevent land degradation, especially agricultural land. This study was conducted in the Bribin Watershed, Gunungkidul, with the aim of analyzing the level of land vulnerability to erosion on agricultural land. Data analysis was carried out spatially by utilizing land system maps and land cover maps. Recommendations for soil conservation on agricultural land are determined based on the level of land sensitivity that has been analyzed. Land sensitivity to erosion in the Bibrin Watershed is classified into four categories, namely very low (0.02%), low (5.03%), moderate (27.82%), and high (67.13%). Various watershed management strategies are applied by considering the level of land sensitivity. The creation of gulud terraces and the return of topsoil as well as reforestation on ex-mining land are soil conservation efforts in controlling erosion. </em></p>2025-05-19T00:00:00+07:00Copyright (c) 2025 Lintang Panjali Siwi Pambayun, Adiprasetya Widyatamahttps://e-journal.uniflor.ac.id/index.php/Agr/article/view/4737INVENTARISASI DAN POTENSI MANFAAT TUMBUHAN LIAR DI BAWAH TEGAKAN PINUS (PINUS MERKUSSI) DI KABUPATEN GOWA SULAWESI SELATAN2025-04-25T07:49:03+07:00Sri Sudewissudewi822@gmail.comAbdul Rahim Salehrahim.saleh09@gmail.com<p><em>Palm oil is one of the plantation commodities that play an important role in the Indonesian economy. Wild plants are still considered as harmful plants because in general people do not know their benefits. The purpose of this study was to identify and document wild plant species that grow under pine stands in Tinggimoncong District, Gowa Regency, South Sulawesi and analyze the potential benefits of wild plant species, especially related to their use in the fields of health, economic agriculture and other value-added products. The method used was the Exploration Method by exploring the research location of the habitat of wild plants under pine stands. </em><em>The identification process is carried out by taking pictures of samples through the Picture This application available on the Google Playstore platform then matching using an invasive plant identification book. The results of the study found as many as 20 species of potential wildplants consisting of the families Asteraceae Poaceae Phyllanthaceae, Melastomataceae, Umbelliferae, Lamiaceae, Nephrolepidaceae, Polypodiaceae, Urticaceae, Plantaginaceae, Polygalaceae, Pteridaceae, Solanaceae, Rubiaceae, Verbenaceae, Caryophyllaceae. </em><em>Families from Asteraceae, Poaceae, and Polypodiaceae produced more than 1 wild plant species compared to other families which only produced an average of 1 plant species. Overall, wild plants found under pine stands are useful as medicinal plants. </em><em>Some species are useful as food for animal feed, ornamental plants, mosquito larvicides, foot sanitizers, sunscreen, natural pesticides, insecticides, and vegetable herbicides. This research contributes to the development of science, providing a positive impact on the empowerment of local communities, which not only provides scientific contributions but also sustainable socio-economic and environmental.</em></p>2025-05-19T00:00:00+07:00Copyright (c) 2025 Sri Sudewi, Abdul Rahim Salehhttps://e-journal.uniflor.ac.id/index.php/Agr/article/view/5728PENGARUH APLIKASI BIONEMATISIDA PURPUREOCILLIUM LILACINUM TERHADAP KOMUNITAS NEMATODA PADA LAHAN JAMBU KRISTAL2025-05-21T06:10:20+07:00Ni Kadek Emi Sintha Dewiemisintha@fp.unila.ac.idFatimah Az Zahraazzahraaa803@gmail.comI Gede Swibawaigede.swibawa@fp.unila.ac.idRadix Suharjoradix.suharjo@fp.unila.ac.idYuyun Fitrianayuyun.fitriana@fp.unila.ac.idTri Maryonotri.maryono@fp.unila.ac.idPuji Lestaripuji.lestari@fp.unila.ac.idSelvi Helinaselvi.helina@fp.unila.ac.idShifa Veronica Auliashifa.aulia@gg-foods.comWardiyani Wardiyaniwardiyani.wardiyani@gg-foods.comFransiska Dina Marlinawatifransiska.dina@gg-foods.comMuh. Basukimuh.basuki@gg-foods.comRatdiana Ratdianaratdiana.ana@gg-foods.com<p><em>Crystal guava (Psidium guajava var. crystal) is a high-value horticultural commodity, but its production in several regions has declined due to infestations by plant-parasitic nematodes. This study aimed to evaluate the effects of a bionematicide formulated with Purpureocillium lilacinum on the composition and diversity of soil nematode communities in crystal guava cultivation. Assessments were conducted on nematode abundance, absolute frequency, prominence value, and diversity metrics, including the Shannon index, evenness, dominance, and species richness, before and after the application of compost and bionematicide treatments. The results revealed the presence of 11 nematode genera, with Aphelenchus being the most dominant. Both compost and bionematicide treatments led to a decline in most genera, except Aphelenchoides, which increased in both abundance and prominence, and Rhabditis, which showed an increase in abundance but a reduction in ecological value. Post-treatment measurements indicated decreases in diversity, evenness, and richness indices, alongside an increase in dominance, particularly following compost application. These findings suggest that while P. Lilacinum is effective in targeting certain nematode groups; however, it may also reduce overall nematode community diversity, potentially leading to the dominance of the Aphelenchus genus. Thus, its application should be accompanied by ecological impact assessments to ensure the long-term sustainability of soil ecosystems.</em></p>2025-05-29T00:00:00+07:00Copyright (c) 2025 Ni Kadek Emi Sintha Dewi, Fatimah Az Zahra, I Gede Swibawa, Radix Suharjo, Yuyun Fitriana, Tri Maryono, Puji Lestari, Selvi Helina, Shifa Veronica Aulia, Wardiyani Wardiyani, Fransiska Dina Marlinawati, Muh. Basuki, Ratdiana Ratdianahttps://e-journal.uniflor.ac.id/index.php/Agr/article/view/5678STUDI KANDUNGAN CAPSAISIN CABAI RAWIT (Capsicum frutescens L.) AKIBAT PEMBERIAN MUTAGEN KIMIA EMS (ETHYL METHANE SULFONATE)2025-05-12T09:12:42+07:00Putri Nur Arrufitasariputrinurarrufitasari.fp@upnjatim.ac.idGalih El Fikrigalihelfikri@gmail.comAline Sisi Handinialinesisihandini.fp@upnjatim.ac.idOentari Prilaningrum Sutantooentari.prilaningrum.fp@upnjatim.ac.idCareca Sepdihan Rahmat Hidayatullahcareca.sepdihan.fp@upnjatim.ac.id<p><em>Chili pepper (Capsicum frutescens L.) is an important horticultural commodity in Indonesia with high economic value, primarily due to its capsaicin content, which provides its distinctive pungency and health benefits. This study aimed to evaluate the effect of Ethyl Methane Sulfonate (EMS) as a chemical mutagen agent on capsaicin content in the leaves and stems of three local chili pepper genotypes. The research was conducted using a two-factor Completely Randomized Design (CRD) with three replications, consisting of EMS concentrations (0.00%, 0.01%, 0.02%, and 0.04%) and three chili pepper genotypes. Mutation treatment was carried out by soaking seeds in EMS solution for six hours. Capsaicin content was analyzed using spectrophotometry at a wavelength of 280 nm. The results showed that EMS treatment had no significant effect on capsaicin content in either leaves or stems across all genotypes. However, there was a tendency for increased capsaicin content in certain treatment combinations, particularly at EMS concentrations of 0.01%. This suggests that EMS treatment at specific concentrations may induce physiological changes associated with capsaicin production.</em></p>2025-05-29T00:00:00+07:00Copyright (c) 2025 Putri Nur Arrufitasari, Galih El Fikri, Aline Sisi Handini, Oentari Prilaningrum Sutanto, Careca Sepdihan Rahmat Hidayatullahhttps://e-journal.uniflor.ac.id/index.php/Agr/article/view/5643PENGARUH ASAM HUMAT-BIOCHAR DAN PUPUK SP-36 TERHADAP KETERSEDIAAN HARA P, SERAPAN P, PERTUMBUHAN DAN PRODUKSI TANAMAN SAWI HIJAU PADA ULTISOL2025-05-21T18:02:38+07:00Ratih Indah Wanitriratihindahwanitri@gmail.comAgus Hermawanratihindahwanitri@gmail.comNabila Putri Safaniratihindahwanitri@gmail.comMuh. Bambang Prayitno ratihindahwanitri@gmail.com<p><em>Ultisol soils have low fertility, characterized by high acidity, low C-organic content and limited availability of P nutrients. One way to improve the properties of Ultisol is through the application of a combination of humic acid-biochar and SP-36 fertilizer. This study aims to evaluate the effect of the combination on phosphorus availability, as well as the growth and yield of mustard greens (Brassica juncea L.) grown on Ultisol. The research was conducted in the Plastic House, Faculty of Agriculture, Sriwijaya University, from September to December 2024. The method used was a Randomized Complete Factorial Design (RALF) with two treatment factors, namely humic acid-biochar (A) with 4 levels and SP-36 fertilizer (P) with 3 levels. Each treatment combination was repeated three times, resulting in a total of 36 experimental units. The results showed that the application of humic acid-biochar at a dose of 20 tons ha-¹ gave an increase in soil pH, C-organic content, phosphorus availability, phosphorus uptake, and growth and yield of green mustard plants compared to other doses. Meanwhile, the application of SP-36 fertilizer at a dose of 100 kg ha-¹ also increased soil pH, phosphorus availability and uptake, as well as the growth and production of mustard greens. In addition, there was a significant interaction between humic acid-biochar treatment and SP-36 fertilizer on plant height and wet weight of mustard greens.</em></p>2025-05-29T00:00:00+07:00Copyright (c) 2025 Ratih Indah Wanitri, Agus Hermawan, Nabila Putri Safani, Muh. Bambang Prayitno