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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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Testing Long Soaking of Pepper Seeds Locally Infected with The Fungus Colletotrichum capsici by Trichoderma harzianum
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

This research aims to determine the viability of local chili seeds infected with Colletotrihum capsici with different soaking times using Trichoderma harzianum. The design used was a Compltely Randomized Design (CRD) consisting of 5 treatments and 4 replications, namely local chili seeds infected with C. capsici mushrooms soaked with T. harzianum suspension for 2 hours, 4 hours, 5 hours, 8 hours, Control (without soaking with T. harzianum suspension). The parameters observed were the percentage of local chili seed germination, Vigor index (IV) local chili seeds, seedling height. The results that the immersion of local chili seeds infected wit C. capsici fungi affected the seed germination, vigor index and heigh chili seedling. The best soaking time is local chili seeds that are soaked for 8 hours.

Analysis of Pesticide Residues in Chili Local (Capsicum annum) in The Region of Mandailing Natal Regency
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Abstract Pesticides are chemicals always applied to various types of plant coomodities. The most widely applied pesticide applications are horticultural crops. The purpose of this study was to determine the organophosphate pesticide residues contained in local chili in Mandailing Natal regency. The research method in the form of a survey conducted on several local chili farmers and traders in the Mandailing Natal area.In this study, 2 main locations of chili cultivation were taken namely in the village of Sibanggor Julu and Tangga bosi. The study was interviewing 5 local chili farmers. The results showed that the local chili which was observes in the two villages contained pesticide residues. Pesticide residues found in the village og Sibanggor Julu exceed the maximum residue limit (BMR), namely Dimethoad 127,7504 mg/kg and chlorpyrifos 0,1513 mg.kg. As for the Tangga bosi Â profenofost 7,4302 mg/kg and dimethoad 30,0019 mg/kg. Â Â Â

The Morphology Characteristics of Plant Gambir (Uncaria gambire Roxb.) in Pakpak Barat District Sebayang, Lukas; Afni Hardyani, Mieke
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Gambier (Uncaria gambire Roxb) is plantation sector sub commodity which was generally managed by people traditionally but that gambir is exporting commodity only some of consumed by small of society. Gambier plant type that exist in Pakpak Bharat generally not been known as morphology. It is caused by lack of knowledge of community resources Bharat Pakpak to know specifically the type of plants are planted gambier. For that survey gambir plant morphological characteristics in some areas as the center of the district gambir Pakpak Bharat in May-August, 2017. The purpose of this study was to obtain data and information about the types / varieties of gambier plants cultivated by farmers in Pakpak Bharat Regency. The results obtained from the characteristic aspects of plant morphology there are 4 types / types of plant gambier Pakpak contained in Bharat. 4 types of plant gambier it: (1) Type of reddish leaf , known as "siarang" (2) Type of leaf shape is wider and longer (3) Type of leaf is narrower and more short and (4) Type of leaf are thicker and greener leaf. Key words : Characteristic, type, gambier plant

Study of Corn Plant Availability as a Source of Forage for Feed and Beef Cattle Waste Potential Paramuji, Muji; Suprihatin; Sunarti, Titi Candra; Sukard
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

ABSTRACT One of the factors that determine the growth of beef cattle is the supply of feed. The main feed source for beef cattle is forage which is currently increasingly limited in availability. The purpose of this study is to examine and evaluate the utilization of corn waste into forage sources of feed and the potential amount of beef cattle waste in Deli Serdang Regency. The data source used in this study is secondary data covering the planting area of corn and beef cattle population described in a qualitative description. The results of studies and evaluations indicated that the availability of forage production of corn (stover) as a source of forage for beef cattle feed in Deli Serdang Regency, in average is only sufficient of 80.57% of the existing beef cattle population, that is every 20,066.95 Ha of corn plants can provide forage for 75,234 cows. Cattle waste potential in the form of feces is 509,385,066.00 kg/year, urine is 203,479,979.00 L/year and the remaining feed is 34,255,889.00 kg/year. Keywords: corn, forage, feed, beef cattle

The Effect of Trichoderma sp on the Intensity of Fusarium Disease and Production of Shallot Sataral, Mihwan; Nurdiansyah, Dzikri; Lamandasa, Frederik H
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Fusarium wilt disease can cause damage and reduce the yield of shallot. Trichoderma sp is a biological agent that can be used to reduce the incidence of fusarium wilt disease in shallot. This study aims to determine the effect of Trichoderma sp on the intensity of fusarium wilt attack and shallot production. This research was conducted in Salodik Village, Luwuk Utara District, Banggai Regency, using a non-factorial randomized block design consisting of five treatments with four replications, namely: P0 (Control), P1 (10 gr Trichoderma sp./liter of water), P2 (12 gr Trichoderma sp./liter of water), P3 (14 gr Trichoderma sp./liter of water) and P4 (16 gr Trichoderma sp./liter of water). The results showed that giving Trichorderma sp had a very significant effect on the average intensity of fusarium wilt disease and had a significant effect on the average production of shallot. The provision of 10 gr Trichorderma sp /liter of water is the best treatment to reduce the intensity of fusarium wilt attack and increased the average production of shallot.

The Effect Hormone Cytokynin and Giberelin On Maize Growth (Zea mays L.) Jumaria Nasution; Friska, Meiliana
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Maize is important food comodity in indonesia beside rice. In its devolepment,maize does not only Â function as food for human, but also asa staple in animal feed industry and other needs, to meet market demand for increased maize production,it is in necessary to improve Â cultivation methods with the application of growth regulators,namely by used giberellin and cytokinins.Giberellin is hormone that affects plant growth in the germination and flowering phases while cytokinins play arole in cell elongation. The aim of this study was to evaluate the effect of gibberelin and cytokinins on stem height, leaf lenght Â panicle land.This study used a completely randomized design with two factors, the concentration of giberellin and cytokinin 0, 10,20,50 ppm.Based on the data analysis below combiation had a significant effect on the stem height(P2C1).Cytokinin at concentration Â of 25 and giberelin Â 10 ppm Â increase the stem height(. The combination cytokynin 50 ppm and giberellin 50 ppm Â (P3C3) affect Â leaf Â lenght and lengt of panicle maize.

Difference in Harvesting Time for The Chemical Quality of Red Betel Leaf (Piper crocatum Ruiz & Pav.) Hamsa, Azizulfiqri; Aulawi, Tahrir; Solfan, Bakhendri
Jurnal Online Pertanian Tropik Vol. 7 No. 3 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Mutu kimia tanaman dapat dipengaruhi oleh waktu pemanenan. Waktu panen yang tepat pada saat bagian tanaman tersebut mengandung senyawa aktif dalam jumlah terbesar. Tujuan penelitian untuk menganalisis pengaruh perbedaan waktu pemanenan terhadap mutu kimia daun sirih merah. Penelitian telah dilaksanakan pada Bulan Maret sampai Mei 2019 di Laboratorium Teknologi Pasca Panen (TPP) Universitas Islam Negeri Sultan Syarif Kasim Riau dan Laboratorium Teknologi Hasil Pertanian (THP) Universitas Riau. Perlakuan yang diberikan adalah waktu pemanenan terdiri atas 07.00 WIB (W1) (Pagi), 11.00 WIB (W2) (Siang) dan 15.00 WIB (W3) (Sore). Rancangan penelitian menggunakan Rancangan Acak Lengkap (RAL) non faktorial terdiri atas 6 ulangan. Ekstraksi menggunakan bahan pelarut etanol 96% selama 24 jam dengan cara direndam. Data dianalisis dengan sidik ragam dan apabila berpengaruh nyata maka dilanjutkan dengan uji Duncan Multipleâ€™s Range Test (DMRT). Pengamatan yang dilakukan terdiri atas Alkaloid, Total Antosianin, Kadar Air, Total Padatan Terlarut dan Warna. Hasil penelitian menunjukkan perlakuan (W3) waktu panen 15.00 WIB (Sore) memberi pengaruh nyata dalam meningkatkan mutu kimia daun sirih merah dengan nilai rataan alkaloid (5,87 mg/g), total antosianin (8,50 mg/g), kadar air (14,54%), total padatan terlarut (1,34 oBrix) dan warna (153%).

Response to the growth of tomato plant (Solanum lycopersicum L.) to giving variation of organic fertilizers Meiliana, Friska; Jumaria, Nasution
Jurnal Online Pertanian Tropik Vol. 7 No. 3 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Tomato plant (Solanum Lycopersicum L.) is one of the horticultural commodities that have the potential to be developed because it has quite high economic value. One of the efforts made to increase the growth of tomato plants is by using organic fertilizers. Organic fertilizer is the best and natural soil repairer than artificial/synthetic. This study aims to determine the response of tomato plant growth to organic fertilizer by observing plant height, the number of leaves, and stem diameter. This study used an experimental method with a randomized block design consisting of 4 treatments, namely compost, manure, and green manure. The results of the observations were analyzed using Analysis of Variance (ANOVA) and statistical data processing was performed using the F test at the level of Î± = 5%. The results showed that the growth of tomato plants for the highest plant measurement, the highest average number of leaves, and stem diameter were found in the compost (PK) treatment.

The Effect of Product Attributes on Purchasing Decision for Palm Oil Derivatives (Case study: Chocolate Appolo at Bina Swalayan Medan) Tambunan, Beryanto; Pinem, Laura Juita
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

The objective of this study is to analyze the effects of product quality, price, brand image and packaging can affect the purchasing decision for palm oil derivatives. This study conducted on the consumers of Bina Swalayan in Jalan Setia Budi Medan City. This study uses a primary source taken from 100 respondents by answering questionnaire. The result of this study determines that purchasing decision for palm oil derivatives is affected positively and significantly by product quality, price, brand image and packaging. The result of this study determine that the coefficient of determination (R-Square) obtained of 0,528, thus it can be determined that effect of product quality, product quality, price, brand image and packaging on purchasing decision for palm oil derivatives 52.8%, while remaining 47.2% is influenced by other factors. Keyword(s): Product Quality, Brand Image, Packaging and Purchasing Decision.

The Influence of Attitudes and Subjective Norms on Interest in Using Certified Seedlings in Smallholder Plantation (Case Study: Sei Tarolat Village Farmers)
Jurnal Online Pertanian Tropik Vol. 7 No. 2 (2020): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

The purpose of this study was to analyze farmers 'assumptions in the use of certified seedlings on oil palm and analyze efforts that could improve farmers' understanding of the use of certified seedlings. This study was conducted in Sei TarolatÂ Village, Bilah Hilir District, Labuhan Batu UtaraÂ Regency. The study was conducted for 61 days starting from March to April 2020. Sampling was done using a purposive technique with a sample of 100 respondents. The method chosen for data analysis was the SEM (Structural Equation Model) method which was operated using the SmartPLS 3.0 program. The results of this study could be concluded that attitudes can influence the interest in using certified seeds in Sei TarolatÂ Village, Bilah Hilir District, Labuhan Batu UtaraÂ Regency and subjective norms can also influence the interest in using certified seeds in Sei TarolatÂ Village, Bilah Hilir District, Labuhan Batu UtaraÂ Regency. Keywords: attitude, certified seedlings, interest, subjective norm

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Benny Hidayat

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03, Prof. A. Sofyan Street Campus USU, Medan 20155- Indonesia

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Sumatera utara

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Benny Hidayat

Contact Email bendayat@gmail.com

Phone +6281396675484

Journal Mail Official jpt@gmail.com

Editorial Address 03, Prof. A. Sofyan Street Campus USU, Medan 20155- Indonesia

Location Kota medan, Sumatera utara INDONESIA

Abstract

Abstract

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Abstract

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Abstract

Contact Name
Benny Hidayat

Contact Email
bendayat@gmail.com

Phone
+6281396675484

Journal Mail Official
jpt@gmail.com

Editorial Address
03, Prof. A. Sofyan Street Campus USU, Medan 20155- Indonesia

Location
Kota medan,

Sumatera utara

INDONESIA