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Jurnal Ilmu Pertanian

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Published by Universitas Gadjah Mada

ISSN : - EISSN : - DOI : -

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

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Articles 7 Documents

Search results for , issue "Vol 2, No 1 (2017): April" : 7 Documents clear

The Influence of Attitude, Subjective Norm, and Perceived Behavioural Control Toward Snack Consumer Behaviour in Halal Labeling in Yogyakarta Ayu Afsari; Any Suryantini; Jangkung Handoyo Mulyo
Jurnal Ilmu Pertanian Vol 2, No 1 (2017): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Halal label was not only related to substances forbidden for a particular religion, but was also associated with many other important things. The talk about halal label issue also meant a talk about health and hygiene. This research aimed to determine the learning level of consumer of the concept of halal-labeled snack; to know how to influence learning, attitudes, subjective norms, perceived behavioural control, and the prices on consumer behaviour of packaged halal-labeled snack, either partially or simultaneously. The effect was determined using a multiple linear regression analysis. Data were collected through compiled structured questionnaires based on certain indicators addressed to 100 respondents. The sampling technique used in this study was a convenience sampling technique, where the sample was selected from members of the population willing to become respondents. The choice of location was determined intentionally (purposive). Attitude scale used was Likert scale, and scale variable used was interval scale. The results showed that the consumer learning level on a basic concept of halal contained in a halal label was very high. This was proven with the results of the interpretation of a score interval, i.e. 88.12%. Consumer behaviour towards snacks in packaging labeled halal simultaneously was influenced by learning, attitudes, subjective norms, perceived behavioural control, and price, while attitude and price influenced partially.

Analysis of The Growth of Oil Palm (Elaeis guineensis Jacq.) Exposed by Aluminum Toxicity and Silica as an Amelioration Satiti Ratnasari; Eka Tarwaca Susila Putra; Didik Indradewa
Jurnal Ilmu Pertanian Vol 2, No 1 (2017): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Aluminum (Al) contained in acidic soil could become an obstacle for plant growth. The Al toxicity could inhibit root growth, water and nutrient absorption. One of the solution to overcome Al toxicity was by applying Silica (Si). The aim of this research was to study the impacts of Al to the growth activity of oil palm and to know the effects of Si to the growth activity of oil palm contaminated by Al. The factorial treatments were arranged in a complete random design with two factors. The first factor was Al toxicity, i.e. with and without Al, while the second factor was the application of Si that consisted of four levels (0, 32, 64, 96 gram per plant). some of variables included leaf area ratio (LAR), leaf area, net assimilation rate (NAR), relative growth ratio (RGR), plant height, and plant dry weight were observed. The result showed that Al toxicity decreased the LAR, leaf area, NAR, RGR, plant height, and plant dry weight. The application of Si 32 gram per plant increased leaf area ratio and was not significantly different from the application of 96 gram Si per plant. However, the application of Si to oil palm contaminated with Al did not affect to relative grow rate, but its application to normal plant would increase the relative growth ratio.

In Vitro Induced Resistance of Fusarium Wilt Disease (Fusarium oxysporum f.sp. cepae) by Salicylic Acid in Shallot CV ‘Bima Brebes’ Khusnul Khotimah; Endang Sulistyaningsih; Arif Wibowo
Jurnal Ilmu Pertanian Vol 2, No 1 (2017): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Fusarium wilt caused by Fusarium oxysporum f.sp.cepae (Foc) is one of the most important diseases of onion in Indonesia. Induced resistance was one of the effective techniques to acquire resistance to fusarium wilt in shallot. Salicylic acid (SA) had been inferred to be in endogenous signal in the systemic acquired resistance response of plants. This research aimed to study the effect of exogenously added SA to resistance in shallot callus cv ‘Bima Brebes’ to fusarium wilt disease in vitro; and to determine the effective concentration of SA to induce resistance. A group of shallot callus was grown in MS medium containing varying SA concentration (0, 15, 20 and 25 ppm) in vitro for 2 weeks. Then, the callus were treated with toxin of Fusarium oxysporum, namely fusaric acid, to have observe the resistance response. In vitro selection was done twice in different fusaric acid concentration. Application of exogenous SA at all concentration did not suppres time of appearance of disease symptom yet. Toxic symptom in the callus was shown by the browning or blackening (off) of callus. Salicylic acid at concentration of 20 ppm effectively reduced the toxic symptom up to 16.66% and supported callus regeneration better than the concentration of 15 ppm and 25 ppm. The number of resistant callus regenerated was 66.67% at pretreatment of 20 ppm of SA.

Effects of Pyraclostrobin on Growth and Yield of Curly Red Chili (Capsicum Annum L.) Arizal Nur Hardiansyah; Endang Sulistyaningsih; Eka Tarwaca Susila Putra
Jurnal Ilmu Pertanian Vol 2, No 1 (2017): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Curly red chili was one of vegetable commodities in Indonesia used for seasoning of home cuisine, food industry, and pharmaceutical industry. Curly red chili cultivation needed fungicide to prevent fungal disease. Pyraclostrobin was a fungicide which could overcome fungal attack and improve plant growth. This research was conducted to study the effectiveness of pyraclostrobin application on vegetative growth of curly red chili plant. Research had been done in farmer’s land in Kemiriombo Village, Dukun Sub District, Muntilan District, Magelang Regency from December 2013 to June 2014. The treatments were assigned in the Randomized Complete Block Design with three replications. The treatments consisted of P1: pyraclostrobin doses 1.5 kg ha-1, 30 and 90 days after planting (dap), P2: pyraclostrobin 1.5 kg ha-1 at 30, 60, and 90 dap, P3: pyraclostrobin 1.5 kg ha-1, at 15, 30, 60, and 90 dap, P4: pyraclostrobin 3 kg ha-1, at 30 and 90 dap, P5: pyraclostrobin 3 kg ha-1, at 30, 60, and 90 dap, P6: pyraclostrobin 3 kg ha-1, at 15, 30, 60, and 90 dap, and P0: control (no treatment). Data were analyzed by orthogonal contrast test with α=5%. The result indicated significant different in the dry weights of root, stem, leaf, and total yield at 12 weeks after planting; number of flower at 9-11 week after planting, 14 week after planting, and 18-21 week after planting; and number of fruits at 10-12 week after planting, 15, and 16 week after planting. The application of pyraclostrobin at all dosages could increase IAA content. The numbers of flower and fruit were influenced by the increasing of IAA content in plant tissue, but did not affect the yield.

Analysis of Soybean Availability in Indonesia Grace Natalia; Dwidjono Hadi Darwanto; Slamet Hartono
Jurnal Ilmu Pertanian Vol 2, No 1 (2017): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

This study aimed to determine the factors affected the soybean availability in Indonesia. This study used secondary data obtained from FAO (Food and Agriculture Organization), World Bank, and the Ministry of Finance. In this study, the data from 1964 to 2013 used to determine the factors affected soybean availability in Indonesia . The Error Correction Model (ECM) was used to determine the factors affected soybean availability. The results showed that (1) the data were stationary at first difference; (2) the data used co-integrated means long-term parameters; (3) ECT coefficient was 0.846 (significant at α = 5%) indicated the model used was valid. Soybean availability in Indonesia in the short term was positively influenced by the total planted area, total soybean consumption, and soybean import tariffs. In the long term, soybean availability in Indonesia was positively influenced by the total planted area, productivity of soybean, domestic soybean prices, soybean consumption, and rupiah exchange rate to dollar. In the long-term, availability of soybeans was negatively affected by the price of imported soybean.

The Efficiency of Farmers Group Association on Strengthening The Institutions of Community Food Distribution Program Stage in Yogyakarta Special Region 2014 Eny Ivan's; Jangkung Handoyo Mulyo; Dwidjono Hadi Darwanto
Jurnal Ilmu Pertanian Vol 2, No 1 (2017): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

In protecting and empowering the farmers, farmers group, and farmers group association (Gapoktan) from falling prices of grain and rice at harvest time and food accessibility problems, the government through the Ministry of Agriculture and Food Security Agency implemented the Strengthening the Institutions of Community Food Distribution Program (Strengthening-LDPM). This research was aimed to analyse the level of efficiency and to identify factors influencing the efficiency of Gapoktan in implementing the Strengthening-LDPM by involving 40 Gapoktan post-independence. The data used in this research were primary and secondary data, drawn from stockopname reports in 2014. This research used DEA (Data Envelopment Analysis) analysis, assuming that CRS (Constant Return to Scale) and VRS (Variable Return to Scale) using output-oriented assumptions. In addition, factors affecting the efficiency were analysed using multiple regression OLS (Ordinary Least Square). Based on DEA-CRS approach, as much as 37.5% Gapoktan were efficient and 62.5% Gapoktan were inefficient. Whereas with the approach of the DEA-VRS, 50% Gapoktan were efficient and 50% Gapoktan were inefficient. The average age of Gapoktan board, total volume of grain or rice sales, total volume of food reserve, and total loan interest affect significantly in increasing the efficiency of Gapoktan in running the strengthening-LDPM Program.

The Effect of Various Weedy Periods on Growth and Yield of Soybean in Agroforestry System with Kayu Putih Joko Budi Santoso Nugroho; Endang Sulistyaningsih; Priyono Suryanto
Jurnal Ilmu Pertanian Vol 2, No 1 (2017): April
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

This study was aimed to detect the effect of various treatment periods of weedy on the growth and yield of soybean; and to determine the most appropriate time periods of weedy for soybean in agroforestry systems with kayu putih. The experiment had been conducted in Menggoran, BDH Playen, KPH Yogyakarta, Gunungkidul Regency, Special Province of Yogyakarta from February 28 to May 9, 2015. Randomized Complete Block Design (RCBD) with three blocks as replications waas applied in this experiment. The treatments were weedy periods on 0, 14, 28, 42, and 56 days after planting (dap) and weed-free period on 0, 14, 28, 42, and 56 dap. The results showed that there were significant differences in the soil moisture content, root surface area, root length, chlorophyll content, root dry weight, shoot dry weight, dry weight of soybean seeds, and weed dry weight. The highest seed weight per hectare was found in weed-free until harvest treatment but it was not significantly different from weedy periods after 56 dap and weed-free after 14 dap. The effective periods of weedy time for soybean in agroforestry systems with kayu putih began at 28 dap - 56 dap.

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