• The Korean Journal of Community Living Science
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• v.28 no.4
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• pp.547-559
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• 2017

This study was conducted to investigate the perception about the construct in the Theory of Planned Behavior using In-depth interview for 24 housewives with elementary school children. Most housewives did not have an intention to buy organic vegetables more in the future than in the present. They showed positive attitudes toward organic vegetables in terms of non-use of pesticides and fertilizers, taste, nutrient content, freshness, mental health, and protection of the environment. They showed negative attitudes toward organic vegetables in aspect of price, credibility of organic vegetables, differences in nutrients, appearance, size, perishability, and accessibility. Children, especially those with diseases, were the most influential persons to their mothers for buying organic vegetables. Housewives' negative attitudes toward organic vegetables were barriers for buying more organic vegetables and they were not willing to overcome these barriers actively. Therefore, government policy and nutrition education to change attitudes is needed to increase consumption of organic vegetables.

• The Journal of Asian Finance, Economics and Business
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• v.8 no.2
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• pp.1055-1062
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• 2021

This study aims to determine the effect of consumer preferences and awareness on interest in organic vegetables. Factors observed in this study were information, consumer preferences, consumer awareness, and consumer buying interest toward organic vegetables. This research uses descriptive quantitative method. The data sampling technique uses accidental sampling method. The data was collected from respondents consisted of 100 consumers of five major retailers in the city of Bogor in Indonesia. The respondents consist of 80 female (80%), and 57 respondents are 25-34 years old (57%). In terms of education, type of job and monthly income of respondent, the sample can be categorized as middle-class segment. The data obtained were analyzed using Structural Equation Modeling with Partial Least Square (SEM-PLS). The results of this study indicate that the information obtained by consumers significantly and positively affects consumer preferences and consumer awareness of organic vegetables. Then, consumer preferences and consumer awareness significantly and positively affect the interest of consumers to buy organic vegetables. Consumer preference for organic vegetables is still considered quite low. The factors that influence the low consumer preference are the price of organic vegetables, which is more expensive than non-organic vegetables and the unattractive packaging of organic vegetables.

• Korean Journal of Organic Agriculture
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• v.7 no.2
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• pp.125-151
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• 1999

After the release of facts that the high nitrate contents in vegetables by Korean organic farming, organic farmers were recommended by Korean Organic Farmer Association to apply 20t/ha compost while they applied before as much as they could, sometimes even more than 100t/ha. This study was aimed to check the safety of Korean organic product in terms of nitrate content. Current nitrate content in leaf and root vegetables by 3 different farming systems(organic farming, conventional farming, greenhouse farming) were monitored and furthermore it was compared with previously published another data in Korea to find out any changes among the monitored years(1993-1999). Current nitrate content in chinese cabbage, lettuce and kale became less compare to those of the beginning of monitoring, and especially those cultivated organic farming got the lowest value while previous organic vegetables at beginning of 90's showed the higher value than those cultivated in greenhouse. This decrease in organic vegetables was affected by less application rate of organic fertilizer than before at 20t/ha. But the nitrate level by organic farming was still higher compare to those cultivated by conventional farming in open field, since currently monitored organic vegetables were cultivated basically in greenhouse condition. It shows the organic farmer the necessity of transfer their farming site and condition from greenhouse to open field in order to decrease of its high level of nitrate caused long-term application and slow release characteristics of organic fertilizer. It was concluded the adoption of soil nitrate test to recommend a organic farmer the exact application rate for need of crop growth. Additionally the mechanism of lower nitrate accumulation in rice and fruit vegetables were also discussed in the paper.

• Journal of the Korean Society of Food Science and Nutrition
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• v.27 no.3
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• pp.471-476
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• 1998

The NO3 contents and organophosphorus pesticide residues in edible part of vegetables cultivated by a conventional or an organic farming methods were determined. The NO3 contents of vegetables cultivated by the organic farming method were between 120ppm and 4,523ppm, whereas its contents of vegetables cultivated by the conventional farming method were between 89ppm and 1,575ppm. Fifty two percent of vegetables cultivated by hte organic farming method accumulated NO3 content over than 2,000ppm, whereas 82% vegetables cultivated by the conventional farming method accumulated NO3 content below than 1,000ppm. The NO3 contents of lettuce dependent on the cultivation method obviously. The NO3 contents of lettuce cultivated by a hydroponic farming method were between 4,800 and 6,500ppm, whereas those cultivated by the conventional method were between 630 and 750ppm. The organophosphorus pesticide residues in edible part of vegetables cultivated by the conventional or the organic farming methods were not detected. The NO3 contents in edible part of vegetables cultivated by the organic farming method should be considered as one of several parameters to judge a real safe vegetable to be certified by goverment.

• Korean Journal of Organic Agriculture
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• v.2 no.1
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• pp.2-15
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• 1993

Major vegetables and fruits in Korea are grouped in 3 Categories according to the Concentration of NO3- content in edible parts of the plant. NO3- content are high in order fruit

• The Journal of Asian Finance, Economics and Business
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• v.8 no.9
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• pp.333-340
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• 2021

In Vietnam, the desire to consume organic vegetables is increasing as people become increasingly concerned about foods that contain several chemicals and toxins that are hazardous to their health. However, numerous subjective and objective factors continue to influence customers' purchase intention and behavior, indicating that this market has not yet reached its full potential. The study analyzes the impacts of trust, price, and convenience on consumers' consumption behavior and frequency of using organic vegetables in Northern Vietnam. We surveyed 312 consumers in the region. After classifying the data, 178 participants have used or regularly used organic vegetables selected for further study. Next, the author applied SmartPLS software with version 3.3 to test the hypotheses and analyze the effects of the observations. The result shows that three main factors affect customers' organic vegetable consumption behavior, especially perceived convenience. This study contributes to the development of comprehensive policy mechanisms and regulations on product traceability. Furthermore, market management authorities must have a strategy in place to inspect the product quality of organic vegetable store chains regularly to build customer trust and support the growth of organic vegetable production and supply chains in Vietnam's northern region.

• Food Science and Preservation
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• v.11 no.1
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• pp.57-62
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• 2004

Pesticide contaminants content was determined about both general vegetables marketed at Garak-dong market and organic vegetables cultivated at Hongchun, Kangwon-do. The vegetables were kale, Angelica Keiskei Koidz, celery, lettuce and Allium fistulosum. Pesticide contaminants content of 5 kinds general vegetables were 93.5, 57.7, 112.4, 76.5, 65.2 ppm, respectively. This residual levels were showed 75.35, 70.68, 78.49, 70.49％ about standard level, respectively. Angelica Keiskei Koidz was not able to calculate the residual level because the standard level was not established in Korea. In contrast, the residual levels of organic vegetables were determined 36.4, 21.0, 42.9, 29.1, 25.1ppm, respectively. This level was about 30％ of standard level, 38.93, 36.40, 38.17, 38.04, 38.50％ of general vegetables. At the result, pesticide contaminants content of organic vegetables was less than 40％ of general vegetables.

• Food Science and Preservation
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• v.11 no.3
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• pp.424-429
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• 2004

Proximate components, minerals, vitamins and chlorophyll contents were determined in vegetables purchased at Garak-dong market and organic vegetables cultivated at Hongchun, Kangwon-do. The vegetables were Kale, Angelica Keiskei Koidz, Celery, Lettuce and Allium fistulosum. In proximate component contents, analyzed crude protein and fat contents of organic vegetables were higher than those of general vegetables. Organic vegetables had strong green color. Minerals such as sodium, potassium, calcium, phosphorus, iron as well as vitamins were determined. Contents of minerals and vitamins in organic vegetables were higher than those of general vegetables. Total mineral content of organic and general kales were 811.8 mg/l00g, and 688.1 mg/l00g, respectively. Total mineral content of organic Angelica Keiskei Kowz, Celery, Lettuce and Allium fistulosum were 447.9, 486.5, 368.6, and 320.9 mg/100g, respectively.

• Journal of the East Asian Society of Dietary Life
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• v.26 no.3
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• pp.201-206
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• 2016

Consumers are more aware of their health and more conscious of environmental conditions nowadays. As such, there is an increasing demand for agri-foods obtained from organic agricultural practices. The present study aims to compare quality characteristics and antioxidant activities between organically and conventionally grown perilla leaf, leaf lettuce, broccoli, and cabbage. The conventionally grown leafy and stem vegetables showed significantly (p<0.05) higher weights and lengths. There was no significant difference in moisture contents of organically and conventionally grown vegetables. The L (lightness), a (redness), and b (yellowness) values of organically and conventionally grown perilla leaf, leaf lettuce, broccoli, and cabbage showed significant differences (p<0.05). Conventionally grown perilla leaf, leaf lettuce, and broccoli showed significantly (p<0.05) higher DPPH and ABTS radical scavenging activities. Overall, the quality characteristics of conventionally grown leafy and stem vegetables were higher than those of organically grown ones. On the other hand, antioxidant activities of organically grown leafy and stem vegetables were higher than those of conventionally grown ones. Further studies are recommended to evaluate other differences such as flavor, organic acid, polyphenol, vitamin, mineral, and bioactivity compounds between organically and conventionally grown vegetables.

• Korean Journal of Agricultural Science
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• v.50 no.4
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• pp.967-976
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• 2023

Biochar is emerging as a promising substance for achieving carbon neutrality and climate change mitigation. It can absorb several nutrients via ion bonding on its surface functional groups, resulting in slow dissociation of the bonds. Biochar, like organic fertilizers, contributes to sustainable nutrient management. The purpose of this study was to investigate the effects of nutrient-coated biochar amendments on leafy vegetables production and soil fertility. The nutrient-coated biochar was produced by soaking rice husk biochar in a nutrient solution containing nitrogen (N), phosphorus, and potassium for 24 hours. Nutrient-coated biochar and organic fertilizers were applied to soil at a rate of 120 kg·N·ha^-1. The growth components of the leafy vegetables showed that nutrient-coated biochar led to the highest fresh weight (FW) of both lettuce and kale (i.e., 146.67 and 93.54 g·plant^-1 FW, respectively). As a result, nutrient-coated biochar amendments led to superior yield compared to the control treatment and organic fertilization. The elemental composition of leafy vegetables revealed that soil amended with nutrient-coated biochar resulted in higher nutrient contents, which was attributed to the high nutrient contents supplied by the rice husk biochar. Soil amendment with nutrient-coated biochar positively enhanced the soil fertility compared to amendment with organic fertilizer. Therefore, nutrient-coated biochar is a promising substance for enhancing agronomic performance of leafy vegetables and improving soil fertility.