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Published by Universitas Sumatera Utara
ISSN : 26557576     EISSN : 23564725     DOI : https://doi.org/10.32734/jpt.
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Tropical Agriculture Journal (JPT) is a peer-reviewed online journal of Agriculture Postgraduate Study Program Universitas Sumatera Utara (USU). Journal is a result of research, or scientific reviews of researchers, students and agricultural institutions, and others related to agricultural studies in the tropical region. Published in Indonesian and English language with 3 volumes/year (April, August, December). These articles are indexed by Google Scholar, PKP Indexing, RootIndexing, Portal Garuda, Indonesian Publication Index (Garuda Portal), One Search Perpustakaan Nasional, BASE (Bielefeld Academic Search Engine), and Directory of Research Journal Indexing (DRJI), JPT is member of AJPI (Association of Indonesian Agriculture Journal, and strives to be a means of periodic, accredited, national scientific publications or reputable international publications through.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 378 Documents
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Quality Characteristics of Clove Leaf Essential Oil Based on Leaf Pretreatment Using the Steam Distillation Method Ida Ayu
Jurnal Online Pertanian Tropik Vol. 12 No. 1 (2025): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v12i1.17252

Abstract

Cloves are a plant that is often used as an ingredient in cooking or as an addition to cakes. The clove plant is not only used for its cloves, but its leaves can also produce great benefits. Some of the benefits of clove leaves include that they can be used for various types of treatment, including cough medicine, stomach ache medicine, and toothache medicine. The quite diverse chemical content in clove leaves provides quite open opportunities for use, one of which is being used as a raw material for producing essential oils. The aim of this research is to determine the suitability of the quality of the essential oil obtained in the form of yield, specific gravity, refractive index and solubility in 90% alcohol in accordance with the Indonesian National Standard (SNI) produced from clove leaves using the steam distillation method. The research method used in this research is an experimental method by conducting experiments in the laboratory. The treatments used were whole clove leaves (S1), clove leaves chopped at 50% (S2) and 25% (S3) of the total length of clove leaves, and crushed clove leaves (S4). The parameters of this research are yield, specific gravity, refractive index, and solubility in 90% alcohol. The results of the research showed that the best treatment was obtained from clove leaf samples chopped at 25% of the total leaf length which had the highest average yield and specific gravity, namely 2.88% and 1.061 g/ml. The refractive index value and the average solubility of clove leaf essential oil in each sample treatment met the Indonesian national standard (SNI 06-2387-2006).
Effect of Cattle Manure Fertilization on N, P, and K Uptake of Red Chili (Capsicum annuum L.) Grown in Alluvial Soil Ella Saputri; Urai Suci Yulies; Vitri Indrawati
Jurnal Online Pertanian Tropik Vol. 12 No. 1 (2025): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v12i1.18112

Abstract

Red chili (Capsicum annuum L.) belongs to the Solanaceae family and can be cultivated in both lowland and highland areas. West Kalimantan has great potential for chili production on alluvial soils. This study aimed to evaluate the effect of cattle manure application on nutrient (N, P, K) uptake and yield of red chili. The experiment was conducted in Pontianak, West Kalimantan, using a Completely Randomized Design (CRD) with five treatments and five replications, resulting in 25 experimental units. Treatments consisted of P0 (control), P1 (30 tons/ha), P2 (60 tons/ha), P3 (90 tons/ha), and P4 (120 tons/ha). Results indicated that P3 (90 tons/ha) was the most effective treatment, increasing dry weight by 10.29%, N uptake by 21.42%, P uptake by 16.66%, and K uptake by 17.61%. These findings suggest that cattle manure application at 90 tons/ha significantly enhances nutrient uptake and growth of red chili in alluvial soils.    
Monitoring of Air Temperature and Humidity Inside and Outside Oyster Mushroom (Pleurotus ostreatus) House Using DHT11 Sensor Widhiantari, Ida Ayu; Widiastawan, I Kadek Widi; Prasistha, Ni Ketut Intan
Jurnal Online Pertanian Tropik Vol. 12 No. 1 (2025): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v12i2.19868

Abstract

Oyster mushrooms (Pleurotus ostreatus) require a humid environment and stable temperatures to grow optimally. One of the mushroom growing media, namely mushroom house, which need to be regulated in temperature and humidity in order to produce high-quality mushrooms. Management of environmental conditions is essential, as significant changes in temperature and humidity can inhibit mold growth or even cause disease. This study aims to monitor the internal and external conditions of the oyster mushroom growing environment using a DHT11 sensor so that ideal growth conditions can be obtained. This research was carried out through several stages, including the preparation of tools and materials, hardware design, layout arrangement, testing of temperature and air humidity control systems, and monitoring oyster mold growth. The results of the 20-day study showed that the internal temperature in oyster mushroom clusters was at the ideal temperature for oyster mushroom growth, which ranged from 25,3°C to 30,8°C, while the maximum humidity reached up to 98% at certain times. The external temperature of mushroom house is in the temperature range of 28°C to 33,5°C with a relatively lower humidity, ranging from 73,2% to 91,2%. Humidity above 90% dominates most measurements, especially in the afternoon, creating ideal conditions for mold growth. The use of the DHT11 sensor in temperature and humidity measurements in this study was effective in recording significant daily fluctuations. The resulting data shows that the sensor is able to detect changes in temperature and humidity of the kumbung chamber and the environment.
Comparative Study of Bioinsecticide Quality of Bintaro Leaf (Cerbera odollam G.) between Laboratory and Pilot Scale Kurniawan, Indra Saputra; Susinggih Wijana2; Beauty Suestining Diyah Dewanti; Muji Paramuji
Jurnal Online Pertanian Tropik Vol. 12 No. 1 (2025): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v12i1.20019

Abstract

Bioinsecticide constitutes a sustainable solution to mitigate the deleterious consequences of excessive reliance on synthetic insecticides. Bintaro (Cerbera odollam Gaertn.) is a promising candidate for bioinsecticide production due to its efficacy. However, it is imperative to note that the scale of production significantly impacts the process conditions and the quality of the resulting products. To this end, a comparative study was conducted on the manufacturing of bintaro leaf bio-insecticide on a pilot scale. The objective of this study is to ascertain the discrepancy in saponin content, water content, and toxicity of bintaro extract between laboratory and pilot scale. This study uses the reference of previous research where the best treatment of material to solvent ratio 1:10 (w/v) was obtained, namely using 15 grams of bintaro leaf material and 150 ml of solvent with 7 cycles of socletation. In the pilot scale study there was an increase in the amount of material used to 2 kg of dried bintaro leaves and 30 liters of methanol solvent. The results showed that the crude extract of bintaro leaves had a yield of 27%, saponin content of 0.63%, water content of 19.35%, and toxicity level of 45.33%.
Correlation Between Soil Macrofauna and Soil Chemical Properties in Smallholder Palm Oil Plantations Pratama, Raharya; Sulakhudin; Leony Agustine
Jurnal Online Pertanian Tropik Vol. 12 No. 2 (2025): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v12i2.18252

Abstract

Writing This study aimed to determine the relationship between soil macrofauna communities and soil chemical properties in smallholder oil palm plantations. Field sampling and laboratory analyses were conducted at five observation points arranged diagonally. Soil macrofauna were collected using two methods: the pitfall trap method for surface-dwelling organisms and the monolith method for subsurface organisms. Observed parameters included population abundance, species diversity and richness, organic carbon (C-organic), total nitrogen (N-total), available phosphorus (P), and exchangeable potassium (K-dd). Data were tested for normality and linearity prior to correlation analysis. The results from the pitfall trap method showed that pygmy grasshoppers (Tetrigidae) were strongly correlated with C-organic (r = 0.757) and N-total (r = 0.677), while termites (Termitidae) also showed strong correlations with C-organic (r = 0.612) and N-total (r = 0.553). Carpenter ants (Formicidae) exhibited negative correlations with all soil nutrients, whereas black garden ants (Formicidae) showed a strong positive correlation with available P (r = 0.604). Only one species was found using the monolith method; therefore, no further analysis was conducted. Overall, macrofauna diversity and species richness showed very strong correlations with C-organic and N-total (r > 0.94), and strong correlations with K-dd (r = 0.860). These findings indicate that the availability of organic carbon, nitrogen, and potassium plays a crucial role in shaping soil macrofauna community structure in smallholder oil palm plantations.  
The Participation of Oil Palm Growers ( Elaeis guineensis Jacq.) in Marketing Their Products at the Multi-Business Consumer Cooperative in Pematang Bandar District, Simalungun Regency Nora, Silvia; Kamelia Noviyanti Saragih; Aisar Novita
Jurnal Online Pertanian Tropik Vol. 10 No. 3 (2023): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v10i3.9101

Abstract

This study aims to examine the level and factors that influence the participation of oil palm planters ( Elaeis guineensis Jacq.) in marketing their products at the Multi-Business Consumer Cooperative in Pematang Bandar District, Simalungun Regency. The research method used is quantitative research with a descriptive approach. The implementation of this study was carried out in Pematang Bandar District, Simalungun Regency, involving 54 respondents. Primary data includes the characteristics of farmers who are members of cooperatives and the results of questionnaires from the independent and dependent variables. The data was processed using multiple linear regression test. The results showed that the level of participation was categorized as very high with a value of 84.1% and the variables of service quality, welfare of extension workers, knowledge of cooperatives, interest in cooperatives and member satisfaction had a significant effect on the participation of smallholders. The variables of the role of the extension worker and the ability of the administrators have no significant effect.
Study Of Talling Compatibility To Production Palm Oil (Elaeis guineensis Jacq) In PT. Langkat Nusantara Kepong Tanjung Beringin Garden Hinai District, Langkat Regency. Arie Hapsani Hasan Basri; Herjono Tampubolon; Aisar Novita
Jurnal Online Pertanian Tropik Vol. 10 No. 3 (2023): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v10i3.9105

Abstract

Study of Talling Suitability for Palm Oil (Elaeis guineensis Jacq) Production at PT. Langkat Nusantara Kepong Tanjung Beringin Gardens. The purpose of this study was to examine the percentage of suitability of talling with production and to examine the factors that affect the suitability of talling with oil palm production at PT. Langkat Nusantara Kepong Tanjung Beringin Gardens. This assessment was carried out from March to June 2022. The data collection method was carried out by means of interviews with garden assistants and harvest foreman and secondary data was obtained from the division office. The statistical analysis used was a simple statistical analysis using tables and diagrams using a one sample t-test which is used to compare the difference in the percentage of talling with the production to be compared with company standards. The results showed that the talling calculation was not accurate with the realization of production with a percentage of 91.67%. The factors that affect the suitability of talling with the realization of production were the accuracy of talling calculations, rainfall, fruit loss in the field and the number of harvesters with their work performance.
The Effect Of Interval Giving ZPT Hantu And Growmore Fertilizer On Grafting Growth Of Citrus Plants (Citrus Sp) erti, Erti kumala indah; Mukhlis
Jurnal Online Pertanian Tropik Vol. 10 No. 3 (2023): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v10i3.9185

Abstract

ABSTRACT This research aims to determine the effect of ZPT Hantu and Fertilizer Gromore on the growth of citrus plant grafting (Citrus sp). The experimental design used in this study was a Randomized Block Design (RAK) with two factors, namely ZPT Hantu and Fertilizer Growmore. The results of statistical analysis showed that the ZPT Hantu treatment on the growth of shoot height at the age of 5 weeks, 7 weeks, 9 weeks and 11 weeks, stem diameter parameters at 5 weeks, 7 weeks, 9 weeks, the number of stalks at the age of 5 weeks, 7 weeks. significant effect on thebut diameter of 11 Weeks After Planting and leaf area parameters of 11 Weeks After Planting. The results of statistical analysis showed that. Growmore fertilizer was applied to the parameters of shoot height at the age of 5 weeks, 7 weeks, 9 weeks and 11 weeks, stem diameter at 5 weeks, 7 weeks, 9 weeks and 11 weeks, the number of leaf stalks at 5 Weeks After Planting, 7 Weeks After Planting, 9 Weeks After Planting and 11 Weeks After Planting, the parameter of leaf area at 11 Weeks After Planting showed no significant effect. The results of statistical analysis showed that the interaction between the two treatments showed aninsignificant effect on the parameters of bud height, stem diameter, number of stalks and leaf area.
Effect of Giving Types And Doses of Organic Matter on The Growth And Yield of Sweet Corn (Zea mays saccharata Sturt) In Tidal Land Sri Rahayu; Agus Suyanto; Ida Ayu Suci
Jurnal Online Pertanian Tropik Vol. 10 No. 3 (2023): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v10i3.10634

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh jenis dan dosis bahan organik terhadap pertumbuhan dan hasil jagung manis (Zea mays saccharata Sturt) di lahan pasang surut. Penelitian dilaksanakan di Desa Rasau Jaya III, Kecamatan Rasau Jaya, Kabupaten Kubu Raya. Penelitian ini dilaksanakan selama 4 (empat) bulan dimulai dari bulan Januari 2021 sampai bulan April 2021. Penelitian ini menggunakan Rancangan Acak Kelompok (RAK) dengan pola faktorial, 2 faktor, yaitu: faktor I adalah penggunaan Jenis Bahan Organik dengan kode P yang terdiri dari tiga taraf yaitu : P1= kompos organik jerami padi P2= pupuk kandang sapi dan P3= pupuk kandang ayam. Faktor II dosis bahan organik dengan kode D yang terdiri dari tiga taraf yaitu: D1= 5 ton bahan organik /ha (1,125 kg/petak), D2= 10 ton bahan organik /ha (2,25 kg/petak), D3= 15 ton bahan organik/ha (3,375 kg/petak). Variabel yang diamati dalam penelitian adalah tinggi tanaman, jumlah daun, berat tongkol tanpa kelobot per tanaman dan berat tongkol tanpa kelobot per petak. Berdasarkan hasil penelitian pengaruh jenis dan dosis bahan organik terhadap pertumbuhan dan hasil tanaman jagung pada lahan pasang surut, interaksi perlakuan jenis dan dosis bahan organik berpengaruh tidak nyata pada semua variabel yang diamati meliputi tinggi tanaman, jumlah daun, berat tongkol per tanaman, dan berat tongkol per petak. Pengaruh mandiri jenis bahan organik berpengaruh sangat nyata pada semua variabel yang diamati meliputi : jumlah daun, berat tongkol per tanaman, dan berat tongkol per petak. Taraf Perlakuan P3D2 menunjukkan hasil terbaik pada variabel tinggi tanaman (3,03 m), jumlah daun (13 helai), berat tongkol (336,67 g) dan berat tongkol per petak (4,93 kg).
Analysis of Income and Feasibility of Shallot Farming (Allium ascalonicum, L) Group of Combined farmer groups “Tani Hasil” from Gandasuli Village, Brebes Regency: Analysis of Income and Feasibility of Shallot Farming (Allium ascalonicum, L) Group of Gapoktan “Tani Hasil” from Gandasuli Village, Brebes Regency Muhammad Juwanda; Suci Nur Utami; Muhammad Dini Adita; Khusnul Khotimah; Yan El Rizal Unzilatirrizqi
Jurnal Online Pertanian Tropik Vol. 11 No. 1 (2024): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jpt.v11i1.11945

Abstract

Shallot (Allium ascalonicum, L) is one of the leading agricultural commodities in Brebes Regency which is the national shallot center. Analysis of income and feasibility of shallot farming in Brebes has never been studied. This research was conducted to determine the study of income analysis and the feasibility of shallot farming carried out by farmers who are members of a combined farmer group (Gapoktan) Gandasuli sub-district, Brebes Regency. This research was conducted from February to March 2023 on shallot farmers at the Gapoktan located in Gandasuli Village, Brebes District, Brebes Regency. The location selection was carried out purposively with the consideration that Gapoktan is a combination of farmer groups that consistently cultivate shallots throughout the year. The research method used in this study is a qualitative method with a case study type of research. The data used are primary data and secondary data. The shallot farming business obtained a total farmer income of Rp. 200,000,000 with a total production cost of Rp. 152,110,000 and the income received is IDR 47,890,000. The results of the analysis obtained the R/C ratio value of 1.315 which indicates that the shallot farming carried out by Gapoktan "Tanihasil" Gandasuli Village, Brebes Regency is feasible to cultivate with a BEP value of Rp. 190,140,000. Farmers with a productive age and long experience working in shallot farming will influence the success of shallot cultivation.

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