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Jurnal Agricultural Science
Published by Universitas Ratu Samban
ISSN : 2089144X     EISSN : 30317398     DOI : https://doi.org/10.58222/jas.v18i1.169
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences
Jurnal Agricultural Science published by Faculty of Agriculture Universitas Ratu Samban. This journal is published in one volume of two issues per year (Mey and November) by the Indonesian Agency for Agricultural Research and Development. The journal publishes primary research articles of current research topics from all over the world, not simultaneously submitted to nor previously published in other scientific or technical journals. General review articles will not be accepted. The journal maintains strict standards of content, presentation, and reviewing. The official language of the journal is Indonesia and English. The journal will consider papers from any source if they make an original contribution to the experimental or theoretical understanding and application of theories and methodologies of some aspects of agricultural science. The definition of agricultural science is kept as broad as possible to allow the widest coverage in the journal including socio-economic aspects. The focus of the journal is in the following areas: Agronomy, animal science, soil science, climate and environment related to agricultural aspects. Agronomy covers the topics of plant breeding, physiology, production, biotechnology, plant protection (pest and disease) and post-harvest. Animal sciences include breeding, nutrition, reproduction, and disease. Soil Sciences cover aspects of mineralogy, classification, land evaluation, chemistry, fertility, fertilizer, conservation, and biology, aquaculture and marine, agribusiness, socio-economic.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Agronomi dan Ilmu Tanaman
Articles 5 Documents
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Search results for , issue "Vol 19 No 2 (2024): NOVEMBER" : 5 Documents clear
Effect Of Combination Of Extracts Of Several Rhizomes On Mortality Of Armyworm (Spodoptera sp.) On Sweet Potato Plants (Ipomoea batatas L.) Simbolon, Syamsuddin; Wahyuni, Siti Hardianti; Friska, Meiliana
Jurnal Agricultural Science Vol 19 No 2 (2024): NOVEMBER
Publisher : FAKULTAS PERTANIAN UNIVERSITAS RATU SAMBAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58222/jas.v19i2.283

Abstract

The use of a mixture of rhizome extracts of red ginger, turmeric, and kencur to control armyworms (Spodoptera litura F.) is an important prospect in increasing the yield of sweet potato crops, because plant-based pesticides can be used in single or mixed forms. The study aimed to determine the influence of various mixed effects of different concentrations of extracts of several rhizomes on the mortality of Grayak caterpillar pest (Spodoptera litura F.) on sweet potato plants (Ipomoea batatas L.). As well as determining the concentration of rhizome extract mixture that is more effective in controlling Grayak caterpillar pests (Spodoptera sp.) on sweet potato plants (Ipomoea batatas L.). This study used a method with a Group Random Design (RAK) consisting of 5 treatments and 5 replicates. The treatment is: 1. Control (sterile water application), 2. A mixture of red ginger, turmeric, and kencur rhizome extracts 40%, 50%, 60%, 70%, 80%, 90% through food (Stomach poison). The experiment was arranged in a complete randomized design of four replicates each using instar 2 larvae of Spodoptera sp. as many as 280 heads. Research Results The observation results showed that there was an influence of each concentration tested on the pest Spodoptera sp. through food (Stomach poison) against the larvae of the second instar where the level of attack caused in the instar is very high, so the concentration used is 40%-90%. All concentrations showed a real effect on the larvae of the two instars, at a concentration of 40% a mortality rate of 11.50%, and the highest concentration was 90% with a mortality rate of 80%..
Effect Of Lantana Camara Plant Leaf Extracts On Black Soybean (Glycine soja L.) Plant Pests Simanjuntak, Maria Phibertha; Wahyuni, Siti Hardianti; Dini Puspita Yanty
Jurnal Agricultural Science Vol 19 No 2 (2024): NOVEMBER
Publisher : FAKULTAS PERTANIAN UNIVERSITAS RATU SAMBAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58222/jas.v19i2.294

Abstract

This study aims to determine the effect of leaf and flower extracts (Lantana camara) in controlling pod borers (Etiella zincknella) on black soybean (G. soja (L) Merril). This research was conducted in February-June 2024. The study used the non-factorial RAK (Randomized Group Design) method with treatments: PO = No treatment. P1 = Concentration of 5 grams of Lantana camara leaf extract /L. P2 = Concentration of 10 grams of Lantana camara leaf extract /L. P3 = Concentration of 15 grams of Lantana camara leaf extract /L. P4 = Concentration of 20 grams of Lantana camara leaf extract /L. P5 = Concentration of 25 grams of Lantana camara leaf extract /L. The parameters observed were: Plant height, number of leaves, weight of filled pods, percentage of attack. The treatment of Lantana camara leaf extract did not significantly affect the height, number of leaves and weight of pods of black soybean plants. In the percentage of treatment P0, P1, P2, P3 showed no significant difference to the percentage of black soybean pod sucking pest attack but the four treatments were significantly different from the P4 and P5 treatments.
Effect of pruning on the growth and yield of cucumber (Cucumis sativus L.) Mercy Varieties Gulmat Siregar; Parmanoan Harahap; Wahyuni, Siti Hardianti
Jurnal Agricultural Science Vol 19 No 2 (2024): NOVEMBER
Publisher : FAKULTAS PERTANIAN UNIVERSITAS RATU SAMBAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58222/jas.v19i2.306

Abstract

This study aims to determine the effect of pruning on the growth and yield of cucumber variety Mercy. This research was organized using a Randomized Group Design (RAK) with treatments, namely: No pruning (P0), pruning shoots on the main stem (P1), pruning shoots of all lateral branches after the third internode (P2) and pruning 2 lateral branches that appear first after the 3rd internode (P3) with 5 replications. The variables observed in this study consisted of; plant length, number of leaves, total number of fruits, number of harvestable fruits, harvestable fruit length, harvestable fruit diameter, and harvestable fruit weight. Data were analyzed using the F test and if there were significant differences followed by the 5% BNT test. The results showed that the treatment without pruning (P0) was able to produce a better number of fruits than the pruning treatment, but the number of fruits produced was of poor quality. The best plant results were found in the shoot pruning treatment on the main stem (P1) because it was able to increase the number of leaves 24.19% compared to no pruning treatment (P0).
The Effect of Cow Manure Application on the Growth and Production of Cucumber Plants (Cucumis sativus L.) Jusnita Siregar; Wahyuni, Siti Hardianti; Jumaria Nasutiom
Jurnal Agricultural Science Vol 19 No 2 (2024): NOVEMBER
Publisher : FAKULTAS PERTANIAN UNIVERSITAS RATU SAMBAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58222/jas.v19i2.307

Abstract

Cucumber (Cucumis sativus L.) is one of the vegetable plants that has many benefits, namely besides being able to be used as vegetables, fresh vegetables, salads or pickles, cucumbers are also beneficial for health because the nutritional value of cucumbers is quite good as a source of minerals and vitamins. Efforts to increase cucumber plant production can be influenced by many factors, one of which is fertilization. Fertilization is a determining factor in efforts to increase the availability of nutrients for plants, thus the expected impact of fertilization is not only to increase the yield per unit area but also to be efficient in the use of fertilizers. The method in this research is Non Factorial Randomized Group Design with four treatments and six replications, namely A0 (Control), A1 (Cow dung manure dose of 3 kg / polybag), A2 (Cow dung manure dose of 5 kg / polybag) and A3 (Cow dung manure dose of 7 kg / polybag). The results showed that the treatment of cow dung manure gave a significant effect on the parameters of plant height and fruit weight. The best treatment is found in A3, which is the application of cow dung manure at 7 kg/polybag.
The Effect of NPK Fertilizer on Peanut Crop Production (Arachis hypogaea L.) Andrian Imam Rahmadi; Wahyuni, Siti Hardianti; Meiliana Friska
Jurnal Agricultural Science Vol 19 No 2 (2024): NOVEMBER
Publisher : FAKULTAS PERTANIAN UNIVERSITAS RATU SAMBAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58222/jas.v19i2.308

Abstract

The need for peanuts from year to year continues to increase in line with the increasing population, community nutrition needs, food diversification, and the increasing capacity of the feed and food industry in Indonesia. N, P, and K are important factors and must be available to plants because they function as metabolic and biochemical processes of plant cells. Nitrogen is used as a builder of nucleic acids, proteins, bioenzymes, and chlorophyll. The purpose of this study was to determine the effect of NPK fertilizer on the growth and production of peanut plants. This research was conducted from January 2023 to April 2023 at the Faculty of Agriculture, Graha Nusantara University Padangsidimpuan. The method in this research is Non Factorial Randomized Group Design (RAK) with 4 types of calcium fertilizer treatments: 0 g/polybag (C0), 3 g/polybag (C1), 5 g/polybag (C2) and 7 g/polybag (C3). The results showed that NPK fertilizer affected the number of pods, pod weight and seed weight. The calcium fertilizer treatment that gives the best results on soybean crop production is in the C2 treatment, namely a dose of 5 3 g / polybag.

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