Effects of the Site-Specific Nitrogen Management on Economic Feasibility and Environmental Sustainability

강충관,박주섭,이상용,김한명,Kang, Choong-Kwan,Park, Joo-Sub,Lee, Sang-Yong,Kim, Han-Myeong 한국토양비료학회 2001 한국토양비료학회지 Vol.34 No.1

The use of nitrogen fertilizer in intensive agricultural production is of major concern due to its role on agricultural productivity and water quality. Crop production inputs on farm are usually applied at a uniform rate across an entire field. However, actual input requirements often vary within fields. The field variations in yield potential, soil moisture, soil N status, and the efficiency of fertilizer use, uniform application of crop production inputs does not allow optimum efficiency or profitability. This occurs because uniform application often results in areas of over- and under-application which may affect water quality and crop yield. This study used biophysical and economic models to assess the economic feasibility and water quality benefits of site specific nitrogen management for 10 soil types and 35 sample fields in Goodwater Creek watershed located near Centralia, Missouri. Results showed that the economic feasibility and water quality benefits of variable rate application were sensitive to the distribution of soil types within a field. Variable rate(VR) application was not uniformly more profitable than uniform rate(UR) application for the four agricultural systems evaluated and the water quality benefits were insubstantial relative to uniform application of N. 질소비료는 작물의 생장에 있어서 가장 핵심적인 영양소라 할 수 있으며, 질소의 효율적 이용은 안정적인 수확량의 확보 뿐만 아니라 비용절감 및 환경오염원 감축 등 다양한 편익을 제공할 수 있을 것이다. 정밀농업은 토양의 특성에 따라 작물에 필요한 적정량의 시비로 영양분의 이용효율을 높임으로써 환경 경제적 편익을 동시에 추구하는 농법이라 할 수 있다. 본 연구는 GIS를 이용하여 구축한 455개 표본농경지의 토양 및 지형에 관한 Database에 근거하여 각 농경지내에서 토양을 세분하여 적정 시비를 할 경우(site-specific management)와 농경지별 적정 시비를 하였을 경우(uniform rate application) 비료의 사용량, 수확량, 수질오염 정도 등을 EPIC모델을 이용하여 비교분석 하였다. 전체 농경지에서의 가중평균적인 환경 경제적 효과는 큰 차이를 보이지 않지만 각각의 농경지가 다양한 토양으로 구성되어 있고 다양한 토양에 대한 최적의 질소량이 큰 차이를 나타낼 때는 정밀농업의 실천이 경제적 및 환경적 측면에서 충분한 잠재력이 있는 것으로 나타났다.

Effects of the Site-Specific Nitrogen Management on Economic Feasibility and Environmental Sustainability

Choong-Kwan Kang(강충관),Joo-Sub Park(박주섭),Sang-Yong Lee(이상용),Han-Myeong Kim(김한명) 한국토양비료학회 2001 한국토양비료학회지 Vol.34 No.1

바이오매스 이용의 사회적 평가

정만철 ( Jung Man-chul ),강충관 ( Kang Choong-kwan ),박민수 ( Park Min-soo ) 한국유기농업학회 2004 韓國有機農業學會誌 Vol.12 No.4

Recently, many researches on the biomass of the agricultural and livestock wastes are being conducted in several respects. The use of biomass is of benefit to the curtailment of oil import, environmental pollution decrease, global warming mitigation and so on. And, in the agricultural sphere, making use of agricultural byproducts can contribute to the revitalization of the agricultural industry and rural community. In other words, making new products or energy by using biomass have a possibility to be developed as a new industry. The industry can create new businesses and job opportunities for rural dwellers. Also, major 3 positive effects of market formation for the agricultural wastes, increase of the idle land use and creation of the new business are expected. However, the use of biomass may be difficult to secure a proper right as a market good in the autonomic market economy. It is necessary to establish or amend related laws or systematic tools for the revitalization of the biomass use. Also, it is required for the government to bear partial costs of the facilities and others in the beginning stage.

주년광광농업을 통한 지역경제활성화에 관한 연구

황대용(Hwang Dae-yong),강충관(Kang Choong-Kwan),박주섭(Park Joo-sub) 한국농어촌관광학회 2002 농어촌관광연구 Vol.9 No.1

According to the recent agricultural statistics, farm income level is much lower than that of the urban workers. And the proportion of the off-farm income of Korea is also much lower than that of the Japan and Taiwan.<br/> With rural society turning more modernized and open-marketed, considerable responses are in need to tackle these trends. As one of the possible solutions, green tourism which provides economic and environmental benefits to the rural society attracts great concerns from agricultural sectors.<br/> This study was initiated to identify how should be a successful process of the green tourism by reviewing a Japanese green tourism case. The results imply that for the successful green tourism, it is necessary to operate a standing management office for the program development and information service; to develop creative new events using available resources and environment in the region; to integrate network systems of agricultural, industrial and commercial bases of the region; and to be based on customer-attracting business system.<br/>

일본의 유기농산물 유통실태

정만철 ( Jung Man-chui ),강충관 ( Kang Choong-kwan ) 한국유기농업학회 2003 韓國有機農業學會誌 Vol.11 No.2

Recently, together with consumers’ increasing concerns on food safety and environmental issues, there is increasing demand on the environmentally friendly agricultural products such as organic products. At present, Japan, as a biggest net importing country of the agricultural products, is a market of the international-scale in the organic product marketing. Also, it is expected that the possibility of market expansion in the future is very high. According to the 2000 agricultural census in Japan, the number of the environment-friendly agricultural farmers were 501,556 householders. This number is about 145 percent higher than that of the 1996 results of 204,600 householders. Organic products in Japan were mainly marketed through the producer and consumer cooperation, producers’ cooperation, specialized marketing company etc. However, along with the department store, big supermarket and others’ participation in the market recently, the marketing channels are diversified. As of October 1999, market sales of the organic products were estimated about 350 billion yen. It is expected that organic certification system, organic products import, resturant industry scale and others will be more influential factors on the market expansion of the organic products in the future.

관광농원 개발사업의 현황 및 운영실태에 관한 고찰

박주섭(Park Joo-Sub),안병렬(Ahn Pyong-Ryol),강충관(Kang Choong-Kwan) 한국농어촌관광학회 2000 농어촌관광연구 Vol.7 No.1

For over a century, the powerful trends of industrialization and urbanization have steadily changed the economic and social position of rural society. In the last a few decades those trends have intensified. Farm incomes have fallen in real terms. Technological developments have accelerated the deterioration of the rural environments.<br/> In response to these trends, green tourism which provides a bridge between economic development and the environmental conservation for a rural so챠ety continue to be important agri-environmental policy concerns. As a part of the green tourism, there has been a move toward a more sustainable farm tourism industry propelled by a government policy to promote the rural development and to increase farm income since 1984. Consequently, 397 tourism farms were established as of December 1998.<br/> Primary objectives of this study are to identify the farm management strategy needed and to evaluate economic achievements for the tourism farms. For the analysis of this study, 30 tourism farms were randomly selected across the country and field survey was conducted to collect necessary information.<br/> A major finding of the study is that average farm gross income from agri-products is only 26.6% of the total farm income, while other incomes come from by running lodging and dinning facilities. Other results of the farm management and countermeasures are presented.

친환경농업기술을 이용한 벼 재배의 기술체계 및 경제성 -오리, 왕우렁이농법을 중심으로-

박주섭 ( Park Joo-sub ),이상용 ( Lee Sang-yong ),강충관 ( Kang Choong-kwan ) 한국유기농업학회 2001 韓國有機農業學會誌 Vol.9 No.2