• 한국유기농업학회지
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• 제8권1호
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• pp.111-129
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• 1999

In order to get some basic data to check the environmental sound function against soil and water pollution and the safe vegetable production by korean organic farming where an internationally recognized basic concepts of soil fertility management for organic farming is not practiced and only applying the organic fertilizer to maintain the soil fertility, the chemical characteristics of soils and $NO_{3}^{-}$ content of chinese cabbage and lettuce cultivated by the conventional farming, greenhouse cultivation and organic farming were investigated. The highest value of $NO_{3}^{-}$-N in 0~30cm subsoil among the three different farming systems was found in the subsoil of organic farming and it was 3.6 and 6.6 times higher than those of conventional farming in chinese cabbage and lettuce respectively. $P_2O_5$ accumulation in the rhizosphere by organic farming also showed the highest value. The accumulation of $NO_{3}^{-}$-N and $P_2O_5$ in organic farming soil were similar or even more higher to those of greenhouse cultivation. The $NO_{3}^{-}$ accumulation in the vegetable by organic farming reached 3224ppm for chinese cabbage and 2543ppm for lettuce, and it were 4.7 and 6.4 times higher than those by conventional farming. It was concluded that there is urgently necessary to introduce the main concepts of soil fertility management of the Basic Standard of IFOAM, EU regulation and FAO/WHO Codex Alimentarius on organic agriculture(draft) into korean organic agriculture for the operation of environmental sound system and the production of sate vegetable in terms of $NO_{3}^{-}$ content.

• 한국유기농업학회지
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• 제5권1호
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• pp.149-165
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• 1996

In order to get some basic datas on environmental friendly funtion against soil and water pollution and safe vegetable production by organic farming, chemical characteristics of soils cultivated by the conventional farming, greengouse cultivation and organic farming and acumulation of NO3--N in chinese cabbage and lettuce were analysed. The highest value of NO3--N in 0-30cm subsoil of organic farming was found among the 3 different farming systems, and it was 3.6 and 6.6 times higher than those of conventional farming in chinese cabbage and lettuce respectively. P2O5 also show high accumulation in the rhizosphere of organic farming compared to convnetional farming. The accumulation of NO3--N and P2O5 in the rhizosphere of organic farming were simial to those of greenhouse cultivation. The NO3- accumulation in chinese cabbage and lettuce by organic farming reach 3224ppm in chinese cabbage and 2543ppm in lettuce and it were 4.7 and 6.4 times higher than those of convnetional farming. It is urgently necessary to introduce the basic standard of IFOAM, EU and FAO/WHO Codex on organic agriculture into korean organic agriculture for operation of environmental friendly system and production of safe vegetable in terms of NO3-.

• 한국유기농업학회지
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• 제19권spc호
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• pp.222-224
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• 2011

The effects of seawater on growth of lettuce(Lactuca sativa L.), leaf perilla(Perilla frutescens var. japonica Hara), red pepper(Capsicum annuum L.) and cucumber(Cucumis sativus L.) seedlings were investigated in the glass greenhouse. These effects were studied on seedlings, and diluted seawater (1%, 5%, 10%, 20%, 50%, 100% v/v) was sprayed enough on leaves. The tested four vegetable crops have well grown up to 10% diluted seawater, but the tested vegetable crops were damaged from increasing salt levels. Of these, lettuce was provided salt-tolerant vegetable crop and red pepper was considered salt-sensitive vegetable crop. The salt tolerance of vegetable crops is different between crops and complicated because of additional detrimental effects caused by accumulated ions or specific ion toxicities in their leaves. These results show that agricultural use of seawater may be benefit crop cultivation in organic farming system as well as in conventional farming system.

• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2005년도 한국식물병리학회 임시총회 및 춘계학술발표회
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• pp.43.2-44
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• 2005

• 인간식물환경학회지
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• 제21권6호
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• pp.473-484
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• 2018

The purpose of this study is to analyze the patterns of farming materials required for creating and operating elementary school vegetable gardens and to propose a plan for vitalizing business related to urban agriculture. As a result of the survey, the farming materials purchased most for the operation of the school gardens were seeds materials focused on seedlings, compost/fertilizer, and farming tools focused on trowels, sprinklers, and hoes. Purchases of farming materials were made mostly through the internet, while most purchases of seedlings were made in pesticide stores. Therefore, it is necessary to provide information and education related to the use of farming materials. Thus, establishment and maintenance of highly accessible and reliable internet sources are recommended to provide the lists of farm products necessary as well as related information to help users in purchase and use in order to create and operate the school garden. In order to supply high-quality seedlings, it is necessary to provide information and education on the kinds of seedlings, management, cultivation, delivery methods, and the like, focusing on pesticide stores producing and distributing seedlings. Providing such information for participants will improve their satisfaction. Also, if businesses related to urban agriculture use these study results in producing, preparing, managing and selling seedlings and farming materials, they will also be able to generate profits and vitalize urban agriculture.

• 한국유기농업학회지
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• 제3권1호
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• pp.87-97
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• 1994

In the edible parts of chinese cabbage, the NO-3 accumulation was higher in the outer leaves than in the inner leaves and it was higher in the leaf midrib than in the leaf blade. In Radish, it was higher in the aerial part of the root than in the underground part of root. NO-3 accumulation in edible parts of chinese cabbage of organic farming fertilized with compost 8t/10a was about 4 times higher than those of conventional farming with recommended mineral nitrogen; and was similar to those of conventional farming fertilized with twice the mineral nitrogen rate. But, NO-3 accumulation in radish of organic farming with 8t/10a compost was lower than those of conventional farming with recommended mineral nitrogen. It showed NO-3 content in the edible parts of vegetables should be considered one of several parpmeters to judge a real safety vegetable to be certified by government.

• 식물병연구
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• 제13권3호
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• pp.157-163
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• 2007

본 연구는 유기농 채소종자의 소독방법으로 가장 적합한 온탕침지법을 개발하고자 수행하였다. 엽채류 중 열에 비교적 민감한 상추 종자의 최적 온탕침지 조건은 $45^{\circ}C$ 25분이었으며 배추와 무 종자 $50^{\circ}C$ 25분이었다. 온탕침지로 이들 종자의 발아율과 생장은 무처리와 비슷하거나 촉진되었고, Alternaria, Aspergillus, Penicillium, Mucor 등의 종자감염 곰팡이는 90% 이상 혹은 100% 억제되었으며 상추 종자에 감염된 세균 억제효과는 98.5%였다 오이, 고추, 호박 등 과채류 종자 중에는 호박이 가장 온수에 감수성이었는데 $50^{\circ}C$ 15분 침지가 적합하였고 오이와 고추 종자는 $50^{\circ}C$ 25분 처리가 가장 효과적이었다. 온탕 침지한 오이 및 호박 종자의 발아율 및 생장은 무처리와 비슷하거나 약간 높았는데, 고추의 경우에는 발아율은 50% 이상 증가되었으며 뿌리생장은 5배 이상 신장되었다. 이들 종자에 감염된 곰팡이 중 Rhizopus, Aspergillus, Penicillium, Mucor등의 억제율은 $72%{\sim}95.4%$였고 감염세균의 억제율은 $65.5%{\sim}86.0%$였다. 본 시험의 결과로 볼 때 온탕침지의 최적 조건은 종자에 따라 다소 다르며, 온탕침지는 모든 종자전염성 병원균을 방제할 수는 없으나 이들을 효과적으로 억제할 수 있는 기술로 유기농업에서 유용하게 활용할 수 있을 것으로 기대된다.

• 한국식품영양과학회지
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• 제27권3호
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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.

• 한국농공학회논문집
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• 제51권1호
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• pp.27-32
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• 2009

The objective of this study is to assess the feasibility of wastewater reuse for the vegetable farming. The study region, about 250 ha in size, is located on the west coast of Jejudo, Korea. Major agricultural products of the study area are the cabbage, broccoli, garlic and onion. To confirm the feasibility of wastewater reuse, the drought duration and the water requirement analysis were conducted respectively. The average annual precipitation of the study region (1,121 mm) was smaller than that of Jeju island (1,975 mm). The drought duration for a ten-year return period in October through November was more than 20 days. The water requirement for irrigation was calculated by the FAQ Penman-Monteith method which took into account the cultivated crops, planting system, and meteorological conditions of the study region. The water requirement for a ten-year return period was estimated 4.7 mm/day and the water demand for irrigation was $4,584\;m^3/day$. As a result, the irrigation water for the crops was insufficient during their breeding season, especially in October through November. Thus, the result indicated that the study region required the alternative water supply such as wastewater reuse during the non-rainy season. As drought continues to place considerable stress on the availability of fresh water supplies in the study region, irrigation with reclaimed wastewater will play an important role in helping to meet future water demands.

• 한국유기농업학회지
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• 제22권2호
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• pp.335-345
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• 2014

The productivity decrease in environment-friendly farming is the biggest obstacle for the development of environment-friendly food market. This paper aimed to analyze the productivity change in environment-friendly farming of fruit vegetables (oriental melon, watermelon, and strawberry). Box-Cox transformation model was used to infer the functional form of productivity change. The results showed that the periods of productivity restoration to 90% level in oriental melon, strawberry, and watermelon were 14.1 years, 11.4 years, and 6.0 years, respectively. The forms of productivity restoration of fruit vegetables showed differences due to their growth characteristics, incidences of crop pests, preference for the environment- friendly agricultural products, cultivation period and so on. Because the form and period of productivity restoration were different depending on kinds of fruit vegetable, the government policy should be established considering this point of view.