Publisher: Universitas Kristen Satya Wacana   (Total: 3 journals)   [Sort by number of followers]

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Number of Followers: 1  

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ISSN (Print) 0854-9028 - ISSN (Online) 2549-9343
Published by Universitas Kristen Satya Wacana Homepage  [3 journals]

    • Authors: Tia Rostaman, L. Anggria, A. Kasno
      Pages: 183 - 196
      Abstract: Inductively Coupled Plasma (ICP) instrument is a tool used to measure nutrients in the soil, plants, fertilizers, and water, good measurement requires a specific extraction. This study was conducted from March to November 2013 at the Soil Testing and Research Laboratory, Indonesian Soil Research Institute. The soils were collected from the Banten, West Java, and Central Java. The experiment was carried out by the statistical method of two means. The soil used was 100 g of wind-dried soil, which was analyzed by extracting Morgan Venema, Wet Ashing HNO3 and HClO4, Morgan Wolf. The observation was made on the chemical properties of the soil with various concentrations and several extracts. The best extraction was determined based on the value of R2 and the significance of the regression equation between the results of soil analysis of several extractions with the percent yield and nutrient uptake as measured by ICP and AAS tools. The experimental results showed that the ICP-OES and AAS tools could be used with some extractions. This was indicated by the significant regression coefficient data on various extraction. The parameters K, Ca, Mg, Fe, Mn, Cu, and Zn were obtained in the HNO3 and HClO4 extraction, which could be said to be the best extractions used in ICP and AAS equipment. Morgan Wolf extract obtained insignificant results on Cu measurements. This showed that the Cu parameters in the Morgan Wolf extract were not suitable for analysis with ICP.
      PubDate: 2022-12-17
      DOI: 10.24246/agric.2022.v34.i2.p183-196
      Issue No: Vol. 34, No. 2 (2022)

    • Authors: Anicetus Wihardjaka
      Pages: 197 - 210
      Abstract: Climate change caused by increasing anthropogenic greenhouse gas concentrations can threaten food security. Agricultural land is a source of food availability, however it is one source of GHG emissions, especially methane and nitrous oxide. Integration management of land, water, and plants in an integrated manner can be an effort to reduce the impact of climate change. This paper aims to inform the technologies to reduce emissions of methane and nitrous oxide in rice fields. One of the technologies to mitigate greenhouse gas emissions on agricultural land is through the use of natural materials as an inhibitor for the formation of methane and nitrous oxide in the soil due to the content of secondary metabolites in natural ingredients. Natural materials can simultaneously increase nitrogen nutrient uptake and improve crop yields. The methane production in rice fields is suppressed by more than 30% by coconut fiber, turmeric rhizomes, leaf of Ageratum conyzoides, and the leaf of Cosmos caudatus; while application of Cosmos caudatus and Ageratum conyzoides can also reduce the production of nitrous oxide more than 20%, respectively.
      PubDate: 2022-12-17
      DOI: 10.24246/agric.2022.v34.i2.p197-210
      Issue No: Vol. 34, No. 2 (2022)

    • Authors: Antonius Kasno, Kiki Zakiah, I Wayan Suastika
      Pages: 211 - 224
      Abstract: The quality and effective fertilizers support site-specific nutrient management of paddy fields, which can increase yields and efficiency of fertilizer. Fertilizer formulas should be based on soil nutrient status and crop requirements. This study aims to examine the reformulation of compound NPK fertilizers for lowland rice. The study was conducted in Cibungbulang, Bogor Regency from October 2020 - March 2021. The experimental design was carried out using a randomized complete block design with 10 treatments, and 3 replications. The treatments consisted of five levels of NPK 15-10-12 fertilizer doses, plus control treatment, NPK 15-15-15 and single NPK as standard, and additional treatment with the addition of straw compost. The plots were made measuring 5 m x 5 m. The results showed that statistically, the application of NPK 15-10-12 fertilizer gave the same effect on plant height, the number of tillers, weight of dry grain harvested, the weight of dry milled grain, and weight of dry straw compared to single NPK fertilizer and NPK 15-15-15. The optimum dose of NPK 15-10-12 fertilizer for lowland rice is 220 kg ha-1 combined with Urea at a dose of 225 kg ha-1. At the same dose (300 kg ha-1) the efficiency of NPK 15-10-12 fertilizer (9.70 kg grain kg-1 fertilizer) was higher than NPK 15-15-15 fertilizer (8.47 kg grain kg-1 fertilizer). Higher efficiency is indicated by lower fertilization doses. The RAE value of NPK 15-10-12 (142%) was higher than that of NPK 15-15-15 at the same dose and single NPK. This research implies that the formula for compound NPK 15-10-12 fertilizer can be used as a substitute for compound NPK 15-15-15 fertilizer.
      PubDate: 2022-12-17
      DOI: 10.24246/agric.2022.v34.i2.p211-224
      Issue No: Vol. 34, No. 2 (2022)

    • Authors: Sri Sudewi, Baharuddin Patandjengi, Ambo Ala, Muh Farid BDR, Abdul Rahim Saleh, Ratnawati Ratnawati
      Pages: 225 - 238
      Abstract: Rhizobacteria isolated from plant roots have the ability to produce siderophore compounds. These compounds play a role in inhibiting the growth of pathogens by binding to iron (Fe3+) which is needed by pathogens in their development. This research was aimed to find out the siderophore-producing bacteria isolated from local Kamba rice plants and their potential as biocontrol agents. Among the 28 isolates that were successfully isolated from the Kamba local rice rhizosphere, 10 isolates had the potential to produce siderophores with different morphological characters. The test was carried out to see the bacterial isolates capabilities to produce siderophores from two types of siderophores namely catechol and salicylate types. For the catechol type, the highest concentration of siderophore was found in the KBA8 bacterial isolate with 10.990 mg L-1, while the lowest was in the KBA1 bacterial isolate with only 5.876 mg L-1. The salicylate type siderophore with the highest concentration produced 9.493 mg L-1 was from the RKGU15 isolate and the lowest was found in KBU14 isolate which produced only 2.994 mg L-1. The isolates included in the Gram-positive group were 4 isolates while the Gram- negative group were 6 isolates and 90% isolates were able to produce the enzyme catalase. The results of this study indicate that all bacterial isolates can produce siderophores so that they have the potential as biocontrol agents to support environmentally friendly and sustainable agriculture.
      PubDate: 2022-12-17
      DOI: 10.24246/agric.2022.v34.i2.p225-238
      Issue No: Vol. 34, No. 2 (2022)
           DAYAK ONION (Eleuteherine americana Merr) ON PEAT SOIL

    • Authors: Sih Winarti, Alpian Alpian, Herry Palangka Jaya
      Pages: 239 - 248
      Abstract: The purpose of this study was to determine the growth,  yield and the potential for carbondioxide absorption of dayak onion plants given four types of manure on peat soil. This experiment used a completely randomized design with four treatments and six replications. The treatments tried were chicken, swallow, cow, goat manure. The results showed that the type of manure had an effect on plant growth and yield. The growth of plant height and the number of leaves  dayak onion planted on peat soil given cow and goat manure grew significantly higher and more the number of leaves,  the lowest was found in dayak onion plants fed with swallow manure. The highest yield was obtained on dayak onion plants fertilized with 30 t ha-1 cow manure with a tuber weight of 41.50 g clump-1, with a larger tuber diameter, but the highest number of tubers was obtained in dayak onion plants fertilized by swallow manure with tubers diameter  smaller. The highest weight of biomass,  stored  carbon  and carbon dioxide absorption were 6.6; 3.3 and 12.11 t ha-1 found in dayak onion plants planted on peat soil given cow manure 30 t ha-1
      PubDate: 2022-12-17
      DOI: 10.24246/agric.2022.v34.i2.p239-248
      Issue No: Vol. 34, No. 2 (2022)

    • Authors: Felicien Nzamurambaho, Titik Ekowati, Siwi Gayatri
      Pages: 249 - 260
      Abstract: This study analyzed farmers’ income between members and non-members of agricultural cooperatives in Muhanga District, Rwanda. The research used a descriptive design based on quantitative approaches; 60 cooperative members and 60 non-cooperative members which were maize farmers selected randomly in the study, plus 6 local leaders and staff of Tuzamurane Cyeza Cooperative who were used as key informants. Data collection tools were questionnaires and interviews. The collected data were analyzed by income and the independent sample t-test analysis to measure farmers’ income between members and non-members of the cooperative. The findings showed that Tuzamurane Cyeza Cooperative provided services such: as easy access to credit, easy access to agricultural inputs, and acquisition of new technology and helped farmers to increase income from the cooperative. The results from the calculation indicated that the mean income of maize farmers who are members of the cooperative (Group 1), 366420 RWF is greater than the mean income of maize farmers who are non-members of the cooperative (Group 2), 137151RWF; (1RWF=14.04IDR). Further, the value of Sig. (0.047) which less than 0.05 was a good indicator that the variance in incomes of maize farmers who are members of the cooperative and non-members of the cooperative was significantly different. Our findings concluded that agricultural cooperatives’ membership contributed to expanding access to markets, and people need to unite themselves in cooperatives because they play a crucial role in reducing poverty, improving food security, and generating employment opportunities.
      PubDate: 2022-12-17
      DOI: 10.24246/agric.2022.v34.i2.p249-260
      Issue No: Vol. 34, No. 2 (2022)

    • Authors: Laras Nur Fitriani, Darsono Darsono, Umi Barokah
      Pages: 261 - 274
      Abstract: Many factors cause the issue of fertilizer subsidies. One of them is about the implemented system has not been running optimally. The Farmer Card is an innovation to obtain subsidized fertilizers. The innovation has many obstacles, including the lack of awareness and knowledge of farmers’ human resources (HR) in understanding the innovations’ usefulness. The study’s objective was to determine the factors influencing the acceptance of the Farmer Card based on the Technology Readiness and Acceptance Model (TRAM). Primary data were gained from the farmers by taking a simple random sampling method using the Hair formula for as many as 115 farmers using Farmer Card in Kabupaten Sumenep. The data were analyzed using the quantitative descriptive method through the Partial Least Square (PLS) technique. The study’s objective was to determine the effect of optimism, innovativeness, discomfort, insecurity, perceived usefulness, and perceived ease of use on behavioral intention to use in technology readiness with a p-value of 0.000 (<0.05). The test results show that the variables of optimism (H1 and H2), discomfort (H5), perceived usefulness (H9), and perceived ease of use (H10) have a significant effect on behavioral intention to use Farmer Card. Testing the effect of innovativeness (H3 and H4), discomfort (H6), and insecurity (H7 and H8) showed a p-value of 0.091; 0.259; 0.127; 0.853; 0.385 (> 0.05) means that it has no significance. For the Farmer Card program to be successful, it is recommended to enhance cooperation further and shared views among the farmers and stakeholders.
      PubDate: 2022-12-17
      DOI: 10.24246/agric.2022.v34.i2.p261-274
      Issue No: Vol. 34, No. 2 (2022)

    • Authors: Werenfridus Taena, Achmad Subchiandi Maulana, Boanerges P Sipayung, Umbu Joka
      Pages: 275 - 286
      Abstract: East Nusa Tenggara Province has land that tends to be dry, with several superior local fruit commodities such as oranges, mangoes, avocados, and jackfruit. One of the local fruit-producing centers in East Nusa Tenggara is North Central Timor (TTU) Regency. Most of the fruit needs in TTU Regency are supplied from West Miomaffo District, especially Saenam Village. Saenam Village produces 222 Kg of local fruit while Sallu Village is 345 Kg, but the sales volume value of Saenam Village is higher than Sallu Village with a difference of Rp. 1,000,000. Based on these conditions, this study focuses on the comparison of local fruit farming businesses in Saenam Village and Sallu Village. The purpose of this study is to compare and analyze the sales volume, relative market share level, and business position of local fruit commodities by applying BCG analysis. The results showed that the fruit business in Saenam Village had a total sales volume in 2018 of IDR 2,151,313, 2019 of IDR 1,915,296, and 2020 of IDR 2,175,685. Meanwhile, Sallu Village has a total sales in 2018 of Rp 1,009,821, 2019 Rp 899,584, and 2020 Rp 887,281. The market growth rate and relative market share are calculated based on the total sales volume. The results of the BCG analysis show that Saenam Village is in the star quadrant, with a market growth rate of 1.31% and a relative market share level of 2.57. Sallu Village has a market growth rate of -15.25% and a relative market share rate of 0.4. This value explains that the fruit products of Sallu Village are in the dog quadrant. The strategy that needs to be carried out by farmers in Saenam Village is to expand fruit marketing. The strategy that can be applied by farmers in Sallu Village is to replace fruit gardens with vegetable gardens in order to increase income and use land more optimally.
      PubDate: 2022-12-17
      DOI: 10.24246/agric.2022.v34.i2.p275-286
      Issue No: Vol. 34, No. 2 (2022)

    • Authors: Tumpal Sipahutar, Shabil Hidayat, Moral Abadi Girsang, Lermansius Haloho, Sarman Paul Lumbantobing, Sortha Simatupang, Palmarum Nainggolan, Perdinanta Sembiring, melda S Marpaung, Delima Napitupulu
      Pages: 287 - 299
      Abstract: The purpose of this study is to determine the characteristics of shallot cultivation and to understand the financial feasibility analysis in Dolok Silau Simalungun to enhance the improvement of the technology needed. Methods used in this research are survey and observation methods. Based on the assessment results, it was found that shallot farming which is planted on dry land and small scale in Sarang Padang, Dolok Silau, Simalungun has a 0,05 – 0,1 ha area. The productivity of that farming is low which averaging 5,25 tonnes/ha. The total production cost is Rp 59.598.000 with a B/C ratio of 0,59. The capital of shallot production is Rp 10.743,00 per kg. Most of the shallot production cost is absorbed by labor cost (36 %), followed by seed cost (35%). The increment of revenue can be achieved by improving productivity through the improvement of farming technologies. Technology improvements in shallot cultivation that are needed are increasing plant density, seed quality improvement, replacement of labor weeding, and the use of integrated pest and disease control. To anticipate price fluctuations, farmers need a storage technology that is a group warehouse to keep the shallot when the market price is very cheap. Institutional education needs to be strengthened for the socialization of shallot cultivation technology and innovation for the farmers.
      PubDate: 2022-12-17
      DOI: 10.24246/agric.2022.v34.i2.p287-299
      Issue No: Vol. 34, No. 2 (2022)
  • Phylogenetic of Ornamented Chilli Based on the Fruit Morphology and
           Molecular Marker using OPA-12 Primer

    • Authors: Rejeki Siti Ferniah, Endang Kusdiyantini, Nurhayati Nurhayati
      Pages: 57 - 62
      Abstract: There are many varieties of ornamental chilli that may different from their ancestor and cause genetic variability. This research aims to determine the relationship of ornamental chillies in Indonesia based on their fruit morphology and RAPD-PCR. Morphological was analysed by description method, while molecular was analysed by RAPD-PCR using OPA 12 primer. Result showed that Katty, Naga Morich, Big Black Mama, and Yellow Primo were Capsicum chinense based on their morphology and RAPD-PCR using OPA-12 primer.
      DOI: 10.24246/agric.2018.v30.i1.p57-62
      Issue No: Vol. 32, No. 2
School of Mathematical and Computer Sciences
Heriot-Watt University
Edinburgh, EH14 4AS, UK
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