• The Korean Journal of Ecology
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• 제18권3호
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• pp.341-351
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• 1995

The relationship between land uses and water quality was investigated at Kyong-an Stream. Some 70% of this watershed was forested area, half of which was comprised of Pinus densilflora community. Concentrations of $NH_4^{+},\;NO_3^{-},\;NO_2^{-}, total nitrogen, $Cl^{-},\;PO_4^{3-}$, DO, and BOD increased gradually from upstream to downstream, whereas heavy metals did not have such tendancy with the exception of a few sites. Urban area was significantly correlated with hardness and chloride concentration. Relationship among phosphate concentration(P), cultivated field area(F), and stream length(S) in each basin was P = 1.7912 F/S＋0.0103. the concentration of $NH_4^{＋}$ was positively correlated with the population size and cow density within the catchment. The effect of urban area(U) and stream length of the pH(pH) was represented by pH = -4.7344 U/S＋6.52. It can be concluded that the control of nonpoint source pollution as well as point source pollution is one of the important problems of water quality management, especially geological properties must be considered for sustainable development.

• 한국식물병리학회지
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• 제14권5호
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• pp.433-439
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• 1998

The studies on the ecology of virus disease on Chinese cabbage (Brassica campestris subsp. pekinensis) cultivated in alpine area of Kangwon province during summer season to analyse its influence on damage and develope a prediction model were performed from 1993 to 1997. Virus disease on Chinese cabbage occurring in the alpine area showed various symptom types and among there, necrotic spots and dwarf were mainly detected. The disease was increased from early August and continued mid September in every year. The occurrence of virus disease was the highest in 1994 with 20.5%, and the number of aphid vectors were also the highest during the same period. The number of aphids in the alpine areas showed twice peaks every year. For the analysis of damage by virus infection, the infection and injured ratio of all treatments were more than 90% and 80%, respectively. The most important factor for the occurrence of virus disease on Chinese cabbage was temperature. Factors influencing the development of the viral disease in the alpine area were maximum temperature and number of aphid vectors.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.58-58
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• 2022

With the development of advanced technology, automation of agricultural work is spreading. In association with the 4th industrial revolution-based technology, research on field smart farm technology is being actively conducted. A state-of-the-art unmanned automated agricultural production demonstration complex was established in Naju-si, Jeollanam-do. For the operation of the demonstration area platform, it is necessary to build a sophisticated, advanced, and intelligent field smart farming model. For the operation of the unmanned automated agricultural production demonstration area platform, we are building data on the growth of soybean for smart cultivated crops and conducting research to determine the optimal time for agricultural work. In order to operate an unmanned automation platform, data is collected to discover digital factors for water management immediately after planting, water management during the growing season, and determination of harvest time. A subsurface drip irrigation system was established for smart water management. Irrigation was carried out when the soil moisture was less than 20%. For effective water management, soil moisture was measured at the surface, 15cm, and 30cm depth. Vegetation indices were collected using drones to find key factors in soybean production prediction. In addition, major growth characteristics such as stem length, number of branches, number of nodes on the main stem, leaf area index, and dry weight were investigated. By discovering digital factors for effective decision-making through data construction, it is expected to greatly enhance the efficiency of the operation of the unmanned automated agricultural production demonstration area.

• 한국농림기상학회지
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• 제13권2호
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• pp.93-100
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• 2011

포도 캠벨얼리 품종은 우리나라 포도재배면적의 70%이상을 차지하고 있는 대표 품종이다. 최근 기후변화에 따른 기온상승으로 과수 재배지의 변동에 대한 연구가 활발히 진행되고 있다. 본 연구에서는 기후요소와 과수품질간의 상관관계를 밝히기 위해 우리나라 주요 포도 주산단지 사천, 진주, 나주, 당진, 천안, 김천, 영동, 옥천, 상주, 수원, 영주, 강릉, 춘천 그리고 양구 등 13곳의 과원을 대상으로 조사하였다. 개화기는 사천이 5월 25일로 가장 빨랐으며 강원도 양구는 6월 7일로 가장 늦었다. 포도는 성숙일수가 90일 정도 되어야 상품성 있는 품질을 생산할 수 있다. 하지만 남쪽지방에서는 성숙일수가 90일 보다 작다. 강원도 지방은 성숙일수가 100일에서 110일로 가장 길다. 그래서 과실의 당도가 높게 나타난다. 포도 캠벨얼리의 과실 품질은 기상요인 특히 온도와 밀접한 관련이 있으며 온도가 높으면 산도가 높다. 과피두께는 남부지방 과실의 과피가 얇고 북쪽으로 갈수록 과피가 두꺼워지는 경향을 나타냈으며, 과실의 착색에서 남부지방은 수확적기가 지났음에도 착색이 불량하며 북쪽지방은 아직 적숙기가 되지 않았다.

• 한국잡초학회지
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• 제31권1호
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• pp.49-70
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• 2011

양재천에서 관리방법이 상이한 3개의 지방자치구역(강남구, 서초구, 과천시)이 속해있는 8.7km 구역을 매월 1~2회 2005년에 22회, 2010년에 11회에 걸쳐 식물상을 조사하였다. 2005년과 2010년에 조사된 전체초본식물은 85과 534 분류군이 조사되었다. 2005년에는 81과 478분류군, 2010년에는 73과 424분류군으로 2005년에 비하여 2010년에 54분류군이 감소하였다. 아종 10품종 총 424분류군으로 2005년에 비하여 2010년에 54분류군이 감소하였다. 그중 2005년에 발생한 식물분류군 중 자생식물이 74과 429분류군(90%), 재식식물이 24과 49분류군(10%)이었던 반면 2010년에 발생한 식물 분류군은 자생식물이 56과 318분류군(75%), 재식식물이 42과 106분류군(25%)으로 2005년에 비하여 2010년에 자생초본이 감소하고 재식식물 분류군수가 크게 증가한 것을 확인하였다. 2005년에 비하여 2010년에는 전체 발생 분류군중 벼과의 발생비율이 증가하였으며, 상위 10과의 전체식물 분류군중 비율이 증가하였다. 또한 소발생종의 비율이 감소하였고, 광발생종의 비율은 증가하였다. 적은 면적의 관상식물 재식과 나머지 자연식생에서의 위해식물, 덩굴식물 제거를 하고 있는 생태적 식생관리구간(강남구)에서만 발생하는 식물 수가 식물재배구간(서초구), 무관리구간(관악구)에만 발생하는 분류군수의 2배 이상에 달하여 종다양성 측면에서 하류(강남구)가 월등함을 확인 할 수 있다. 2005년에 소발생이거나 미발생종 중에 2010년에 다발생종으로 급격하게 발생량이 증가된 분류군 중 외래식물과 덩굴식물의 비율이 상대적으로 높게 나타났다.

• 기록학연구
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• 제28호
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• pp.123-153
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• 2011

아시아에서는 기원전부터 남아시아의 인도에서 재배 생산한 목화와 면직물이 아시아 전 권역으로 육로와 해로를 통해 전파됨으로써 목화길과 면문화권이 형성되었다. 우리나라에서는 1363년 문익점이 중국에서 들여온 재래면을 재배하다가 1904년부터 일본을 통해 들어온 육지면을 재배하였다. 특히 광주 전남은 조선시대까지 재래면 생산이 가장 활발한 지역이었고, 육지면 도입 후에는 목화 재배와 면직물 생산의 중심지였다. 이처럼 넓은 지역을 대상으로 목화문화자원을 수집 기록하기 위해서는 먼저 그 구성 요소들을 분류한 문화자원세트를 만들고 그에 따라 수집할 객체를 조사한다. 수집 대상 지역은 전파 경로와 목화에 관해 지역이 갖는 의미를 토대로 선정한다. 아시아 전체에서 관련 자원을 직접 수집하기 어려우므로 자료를 소장하고 있는 개인 기관 단체와의 교류 협력을 통해 자원을 공유하는 방안을 마련해야 한다. 광역 문화자원의 수집 기록에 필요한 학제간 연구를 위해 다양한 분야의 관련 전문가를 적극 활용하여야 한다. 실제 유물 수집의 한계를 고려하여 디지털 형태의 자료를 위주로 아카이브를 구축하고 이를 누구나 원격으로 향유 활용할 수 있도록 웹을 통해 제공하여야 한다. 사용자가 자원들의 유사와 차이, 상호간의 맥락을 이해할 수 있도록 온 오프라인에서 비교 전시하는 방법을 마련하여야 한다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 1999년도 Proceedings of International Symposium on Remote Sensing
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• pp.433-438
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• 1999

The land use type of Korea is high-density. So, the image classification using coarse resolution satellite image may not provide land cover classification results as good as expected. The purpose of this paper is to compare the result of visual interpretation with that of digital image classification of 20 m resolution SPOT satellite image at Kwangju-eup, Kyunggi-do, Korea. Classes are forest, cultivated field, pasture, water and residential area, which are clearly discriminated in visual interpretation. Maximum likelihood classifier was used for digital image classification. Accuracy assessment was done by comparing each classification result with ground truth data obtained from field checking. The classification result from the visual interpretation presented an total accuracy 9.23 percent higher than that of the digital image classification. This proves the importance of visual interpretation for the area with high density land use like the study site in Korea.

• 한국조경학회지
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• 제19권3호
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• pp.27-40
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• 1991

For the establishment of district planning in natural parks, vegetationin the most significant point. Consequently, district plan should be made basically under phytosociological investigations. The purpose of this paper is to conserve vegetation in the district planning at natural park(Nam Han San Sung provincial natural park). The result of vegetation survey are as follows : As an actual vegetation 13 communities are recognized. Those are Quercus mongolica-Carpinus laxiflora community, Quercus mongolica-Rhododendron schlippenbachii community, Quercus serrate community, Betula platyphylla var. Japonica community, Quercus dentata community, Quercus mongolica-Pnuus densiflora community, Quercus acutissima community, Robinia pseudo-acacia community, Alnus hirsuta community, Castanea crenata community, Quercus variabilis community, Pinus densiflora community, Pinus rigida community, weed community on cultivated land(Form land), Larix leptolepis reforested land, cut over area and non-vegetation area. The grade of vegetation naturalness was divided into five degrees by characteristics of actual vegetation. I intended to make zoning plan for protection of vegetation with a special attention to the grade of vegetation naturalness and I discussed the necessity of the improvement of existing district plan. District plan was proposed as Fig. 5.

• 농촌계획
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• 제21권2호
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• pp.1-10
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• 2015

This study consists of an observation of the changes in management and agricultural production of Shinbuk-eup based on the data from the Agricultural, Forestry & Census Report Survey. The following is a short summary and suggestions of the research. First, taking a look at the farming conditions of Shinbuk-eup, it shows that it is extremely polarized into rice paddies and vegetable cropping. Second, using the Tobit model to analyze the factor of determination of farmable lands of the farmers in Shinbuk-eup, the higher the number of family members, the less the hired work, and the more the experience in farming, have larger farmable lands. Meanwhile, the younger the farmer, their land mass is higher, however, after reaching their threshold age, their lands decrease.

• 한국식물병리학회지
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• 제10권2호
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• pp.78-82
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• 1994

Unusually severe rice blast epidemic sweeped over the rice growing area in Gyeongnam Province and elsewhere in 1993. Leaf blast infection was reached to 33,133 ha, which is about 24.5% of total paddy area and neck blast infection was apparent throughout 4,421 ha. Major factors affecting such an unusual epidemic appeared to be as follow: Firstly, low temperature, frequent rainfall and coincidentally insufficient duration of sunshine through July and August; Secondly, most cultivars possessing low levels of field resistance were cultivated in wide areas: Thirdly, blast fungus population was enough for successive infection under optimum weather condition and most races distributed in field were able to infect most cultivars.