• 한국관개배수논문집
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• 제9권1호
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• pp.59-69
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• 2002

Changes of concentrations and losses of nutrient via infiltration from paddy plot during rice cultivation were monitored. The infiltrated water samples were collected in a ceramic porous cup which was buried at the depth of 30,50,70, and 90cm beneath the

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.908-910
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• 2003

In this paper the extraction method for the best suitable green vegetation area in urban area, Daegu, Korea, was developed using satellite images (1994, 1999, Landsat TM). For this, the GIS overlay analysis of GVI (Green Vegetation Index), SBI (Soil Brightness index), NWI (None-Such wetness Index) was performed to estimate the best suitable green vegetation area. Also, the statistical documents, algorithm and Tasseled-Cap index were used to recognize the change of land cover such as cultivation area, urban area, and damaged area. Through the result of this study, it is possible to monitor the large sized reclamation of land by drainage or damaged area by forest fires. Moreover, information with the change of green vegetation and the status of cultivation by GVI, but also moisture content by percentage by NWI and surface class by SBI can be obtained.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.95-95
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• 2022

Maize is one of the world's three largest crops and has a long cultivation history, and is an important crop used for various purposes such as food, feed, and industrial raw materials. Recently, the agricultural environment is changing, in which the limit of cultivation of crops is shifted to the north due to the rise in temperature due to climate change. This study was conducted in experimental field of Suwon in 2022 by setting a seeding period earlier than the sowing time to establish the North Korean agricultural climatic zone and meteorological conditions. The test cultivars were silage cultivars, Kwangpyeongok and Dacheongok. As a priming test method, it was used to directly plant seeds in the field through immersion using 4mM zinc (Zn) and 2.5mM manganese (Mn), which are trace elements for seeds. The planting season was early on March 15th, April 1st, and April 15th. The number of days from sowing to silk stage of the two cultivars sown on March 15, April 1, and April 15 was 107, 93, and 85 days for Kwangpyeongok and 109, 95, and 87 days for Dacheongok, respectively. The seed priming test did not show any difference from the control group in the growth survey up to the middle stage of growth. In another test, low-temperature recovery was confirmed through nitrogen (2-5%) foliar fertilization after 3 days, 5 days, and 7 days in refrigeration (0 degrees), a selective low temperature treatment for com in the third leaf stage. As a result of this study, it was confirmed that the low-temperature damaged com treated at 0℃ showed the same growth as that of the untreated com through nitrogen foliar fertilization. These results suggest that urea foliar fertilization for low-temperature damage reduction of corn for silage in high-latitude climates will be helpful. In addition, through the results of the study, additional studies are needed on the recovery mechanism and field application through urea foliar fertilization.

• 한국습지학회지
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• 제2권1호
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• pp.11-17
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• 2000

The natural ecology of our coastal zone has been well preserved because of the designation of Han-Ryea national sea park. However, recently, it is being threatened by the frequent request of district regulation of national park and relaxation of green belt, etc. And also, with the reclamation of the foreshore by the development of industrial complex and tourism resource cultivation on a large scale, development pressure for natural coast is increasing. For that reason, preservation of the ecology, organized management and investigation is needed for the islands which scenery is beautiful and rare animals and plants inhabit. And also, it is worried that major habitats of migrants are diminishing because of the district regulation of national park, relaxation of green belt zone and construction of coastal streets. Therefore. on the basis of the through environmental impact assessment, only the business which are aimed at the preservation and restoration of the natural coast should be admitted and the act of eroding must be restricted.

• 한국생물환경조절학회:학술대회논문집
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• 한국생물환경조절학회 2007년도 춘계 학술대회 및 정기총회
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• pp.288-292
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• 2007

• 한국농림기상학회:학술대회논문집
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• 한국농림기상학회 2014년도 추계 학술발표논문집
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• pp.151-153
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• 2014

• 인삼문화
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• 제5권
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• pp.52-76
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• 2023

이 논문에서는 1930년대 인삼 특별경작구역이 아닌 지역의 인삼업 변동을 살펴보았다. 1930년대 인삼업의 큰 특징으로 삼포 면적의 급격한 증가를 꼽을 수 있다. 1929년 64만2천여 평, 1930년과 1931년 76만여 평이었던 삼포 면적은 1938년에 133만여 평으로 급증하였다. 이는 이 시기에 특별경작구역 외의 인삼경작이 크게 늘어났기 때문이다. 1930년대 초반까지 특별경작구역 내 삼포 면적과 특별경작구역 외 삼포 면적 비율은 약 70 대 30 수준이었다. 그런데 1930년대 후반이 되면 그 비율이 53대 47로 바뀌었다. 이러한 변동의 이유는 특별경작구역 내의 경우 신설 삼포 면적이 줄어든 반면 특별경작구역 외에서는 꾸준히 면적이 증가하였기 때문이다. 일제의 중국 침략 확대로 중국에서 홍삼을 불매하면서 수출이 부진해지자 특별경작구역 내 삼포 면적을 축소한 것이었다. 반면 특별경작구역 외에서는 그러한 영향을 받지 않고 꾸준히 삼포 면적이 증가하였다. 그 결과 1930년대 특별경작구역 외 인삼업이 비약적으로 성장하였다. 특별경작구역 외 인삼업의 성장을 이끈 지역은 전북이었다. 전북은 1930년대 후반으로 갈수록 다른 도들을 압도하여서 특별경작구역 외 삼포 면적에서 전북이 차지하는 비중이 50%를 넘었다. 전북에 이어서 경북과 강원도에서도 인삼경작이 활발하였다. 이외에도 경기도와 경남, 충북 등지에서도 비교적 인삼경작이 활발하였다. 반면 전남, 충남 등은 인삼경작이 이루어졌지만 활기를 띠지는 못했다. 1930년대 특별경작구역 외 인삼업의 성장을 이끈 것은 삼포민들의 노력과 당국의 지원이었다. 경북의 예천군, 경기의 강화군, 충북의 제천군의 사례를 보면, 세 지역 모두 인삼업이 일정하게 발전하자 삼포민들은 조합을 조직하였다. 조합은 인삼경작과 판매를 위해서 조직적으로 활동하였다. 강화군의 경우 특별경작구역 편입을 위해 적극적으로 활동하였다. 제천군의 덕산삼업조합은 경작자금 조달이 관건이라고 보고 도 당국에 보조금을 요청하였다. 이러한 삼포민들의 활동에 대해 행정 당국도 지원하였다. 삼포민의 적극적인 활동과 행정 당국의 지원이 이 시기 인삼업의 성장을 이끌었다.

• 한국토양비료학회지
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• 제46권5호
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• pp.313-321
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• 2013

The Average daily PET (Potential evapotranspiration), evaluated based on the last 30 years meteorological data and the lysimeter experiment carried out by RDA during 11 years, of 9 regions in Korea for the tomato cultivated in greenhouse, was $3.41mm\;day^{-1}$. Two kinds of water saving irrigation standard (WSIS), deficit irrigation standard (DIS) and partial root-zone drying irrigation standard (PRDIS) that include the irrigation interval and the amount of irrigation water according to the region, soil texture and growing stage, were established. According to the DIS and PRDIS, the cultivator can save water up to 29.2% and 53.7%, respectively, for tomato cultivation in greenhouse compared to the full irrigation standard (FIS) which established in 1999. WSIS can be used easily by the cultivator without complicate procedures such as soil sampling and measurement of soil water status by expensive sensors. But the cultivator should care about irrigation method such as PRDI (partial root-zone drying irrigation) without yield decrease.

• Journal of Ginseng Research
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• 제14권2호
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• pp.297-309
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• 1990

Ginseng is renowned for both its medicinal and herbal uses and successful cultivation of Panax ginseng in Asia and Panax Vtiinvtiefolilim in North America has until recently taken place in the native geographical ranges of the plants. As a consequence of the potential high capital return and anticipated increases in consumer consumption, commercial cultivation of American ginseng now occurs well outside the native range of the plant in North America. In fact, the region of greatest expansion of cultivation is in the semi-arid interior region of British Columbia, Canada. Linked with this expansion is the potential domination of the ginseng industry by agricultural corporations. In the interior of British Columbia, the native decidous forest environment of eastern North America is simulated with elevated polypropylene shade and a sllrface covering of straw mulch. The architecture of these environments is designed to permit maximillm machinery useage and to minimize labour requirements. Further, with only a four-year growth cycle, plant densities in the gardens are high. In this hot, semiarid environment, producers believe they have a competitive advantage over other regions in North America because of the low precipitation rates. This helps to minimize atmospheric humidity such that the conditions for fungal disease development are reduced. If soil moisture levels become limited, supplemental water can be provided by irrigation. The nature of the radiation and energy balance regimes of the shade and much environment promotes high soil moistilre levels. Also, the modified environment reduces soil heating. This can result in an aerial environment for the plant that is stressful and a rooting zone environment that is sub-optimal. The challenge of further refining the man modified environment for enhanced plant growth and health still remains.

• 생물환경조절학회지
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• 제19권4호
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• pp.183-188
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• 2010

본 연구는 딸기의 수경재배에서 증발냉각방식을 이용하여 배지의 지하부 온도를 관리할 수 있는 냉각시스템을 개발하고 고온기 온실내 기온에 따른 배지내 온도분포 특성을 분석하고자 다공질 필름 덕트법, 배지 상면 기습부직포 멀칭법, 투수부직포 재배조 표면 증발법의 3가지 냉각시스템에 대하여 배지냉각특성을 시험하였다. 그 결과 투수부직포 재배조 표면 증발법의 경우 온실내 기온 $35^{\circ}C$인 배지표면의 온도와 상대습도 50%일 때 재배조 표변의 부직포의 온도는 $27^{\circ}C$로 니타났으며, 뿌리가 많이 분포되어 있는 배지내 온도는 $28{\sim}30^{\circ}C$ 정도로 나타나 외기온에 비하여 $5{\sim}7^{\circ}C$ 정도로 기장 크게 강하되었다. 따라서, 투수부직포 재배조 표면 증발법이 가장 효율적인 배지냉각 방법이라고 판단된다.