• Journal of the Korean association of regional geographers
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• v.18 no.4
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• pp.364-373
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• 2012

This study is to analyze distribution and change of montane meadows on the lava plateau in the east face of Mt. Baekdu. Process for aims carried out field survey, and analyzed landsat images of 1993, 1999, 2004, and year 2010. After research findings, the area of forests has increased by 33% from $636km^2$ to $848km^2$, montane meadow has decreased by 58% from $303km^2$ to $127km^2$ during 18 years. Montane meadows could be classified as 2 categories of wet meadow and dry meadow by the geomorphic environments and vegetation types. Wet meadow has decreased by 30%, dry meadow has decreased by 70% in the same period. Decreasing areas are replacing meadows with forests in invasion by trees and shrubs. According to the analysis with weather data for 16 years from 1993 to 2008, temperature has increased by $1.6^{\circ}C$, on the other hand, precipitation has decreased by 5.3mm. These kinds of climate change trends continue in the future, it could be change montane meadows into tree types.

• Journal of The Korean Society of Grassland and Forage Science
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• v.18 no.4
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• pp.337-344
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• 1998

This study was conducted to find out the vegetational succession in abandoned hilly pasture, in Yeoju, Kyonggi Province from April, 1993 to October, 1996. The experiment was arranged as vegetation survey (Pflanzenaufuahme) with two different pastures((1) with forkcrane planed pasture and (2) forest pasture). After the abandoned management of pasture, the botanical composition of planed pasture and forest pasture was greatly changed into the type of natural vegetation in the first year and in the second years, respectively. The biomass of life forms of hemicryptophytes, geophytes and chamaephytes was greatly decreased, on the other hand, that of therophytes and nanophanerophytes after abandoned management of planed and forest pasture in three years was slightly increased than those of the vegetation with pasture management. The similarity coefficients among vegetation groups during the survey were greatly affected by botanical composition. The clustering analysis was showed that the communities of relatively similar botanical composition were grouped closely, and the other communities were clustered farther to the same group although the degree of similarity between communities was low. The communities of hilly pasture after abandoned management were gradually successive into the type of natural grassland or forest community in three years.

• Journal of The Korean Society of Grassland and Forage Science
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• v.18 no.4
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• pp.329-336
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• 1998

This study was conducted to find out the changes of the botanical composition, ecological behaviour and forage value of vegetation in abandoned hilly pasture, in Yeoju, Kyonggi Province from April, 1993 to October, 1996. This experiment was arranged as a vegetation survey(Pflanzenaufnahme) with two different pastures ((1) with forkcrane planed pasture and (2) forest pasture). After the abandoned management of pasture, wild grasses and shrubs of the botanical composition were gradually increased and pasture plants tended to decrease rapidly in the two different hilly pasture. In abandoned management of planed and forest pasture, moisture figure, reaction figure and nitrogen figure of the ecological behaviour were greatly decreased and also the forage value of standing crop was greatly decreased in three years (from 7.06 to 4.60 in planed pasture and from 6.81 to 4.38 in forest pasture). After abandon of two different hilly pastures, fresh weight of standing crops in flowering stage was greatly decreased 48.5~54.1% in three years than that of the vegetation at the pasture management.

• Journal of The Korean Society of Grassland and Forage Science
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• v.3 no.2
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• pp.47-57
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• 1983

• Proceedings of the Korean Society of Grassland Science Conference
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• 2001.06a
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• pp.98.2-99
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• 2001

• Journal of The Korean Society of Grassland and Forage Science
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• v.4 no.1
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• pp.18-22
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• 1983

This experiment was performed in order to investigate the effect of the early grazing management on the forage yield and sward composition of oversown pasture. Two levels of the grazing intensity were treated when the grasses were 15cm, 25cm, and 35cm high. It was observed that the treatment C (light grazing intensity at the 25cm grass height) increased the dry matter yield and the botanical composition of the introduced grasses and legumes. From these facts it is suggested that the early grazing management contribute to the high forage yield and good sward composition of the oversown mountainous pasture and can take the place of cutting or other methods economically.

• Proceedings of the Korean Society of Grassland Science Conference
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• 1999.06a
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• pp.80-80
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• 1999

본 연구는 목초지 및 야초지에 자생하는 주요초종에 대해 생태적 반응(생태가)를 부여하여 식생구성에 의한 초지의 토양 환경생태를 평가하는데 기여코자 하였다. 각 초종에 대한 생태가는 수분가 1-12, 토양반응가 및 질소가를 각각 1-9 등급으로 구분하였으며 먼저 우리나라의 초지 및 산지초지에서 발생빈도가 높은 141 초종에 대해서 생태가를 부여하였다.(중략)

• Proceedings of the Korean Society of Grassland Science Conference
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• 2001.06a
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• pp.99-100
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• 2001

• Journal of the Korea Academia-Industrial cooperation Society
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• v.17 no.11
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• pp.285-293
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• 2016

In the paper, we propose a data transmission repeating system that allows data transmission for the effective supervision of cows grazing in the pasture. It is normal practice to divide the pasture into different areas for the purpose of distributing the grazing. However, this makes it difficult to supply electrical power and transmit data, because some of the pastures are far away from the office used for collecting data. To solve this problem, we developed a repeating system that can allow data transmission in the pasture using a solar charging system that consists of a 60W solar panel, 12V/100A battery and 6A solar controller for the power supply and a data transmission algorithm which extends the range of data transmission when using the proposed repeating system. We verified the performance of the repeating system by checking whether the data transmission is successful or not when transmitting from various test points when there is an obstacle between the receiver and repeating system. We also verified the solar charging system by measuring the battery voltage when the system is operated continuously for 31 days and whether the system can supply sufficient power when the weather is cloudy or rainy for a few days. Finally, we verified the performance of the repeating system and data transmission algorithm by conducting experiments in a pasture.

• Journal of Korean Society of Forest Science
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• v.58 no.1
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• pp.101-110
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• 1982

첫째, 산지자원화(山地資源化)의 정의(定義)를 정립(定立)해 보았고 둘째로 초지조성(草地造成)의 현황(現況)을 고찰하여 부실초지(不實草地)가 되었던 원인 중 삼림생태학적(森林生態學的)인 측면(側面)에서의 실패요인(失敗要因)을 검토(檢討)하여 보았다. 세째, 우리나라 삼림생태학적(森林生態學的)인 측면에서 초지조성(草地造成)이 성공할 수 있기 위해서는 어떤 방향으로 계획(計劃)을 수립(樹立), 추진(推進)하는 것이 바람직할 것인지에 대해 몇가지 문헌을 기초로 하여 고찰하여 보았다. 그 결과 과거(過去)의 초지조성(草地造成)이 부실(不實)하였던 원인(原因)을 제거할 수 있고, 임업인(林業人)들이 우려하는 초지(草地)가 또다시 황폐지(荒廢地)로 되돌아 갈 악순환(惡循環)의 전철을 답습(踏襲)하지 않고 산(山)도 웃고, 하천(河川)도 웃고, 초지(草地)도 웃을 수 있는 즉, 국민경제향상(國民經濟向上)과 복지증진(福祉增進)에 이바지할 수 있도록 우리나라 입지환경(立地環境)에 알맞은 초지조성모형(草地造成模型)(가칭 한국형(韓國型) 초지조성모형(草地造成模型)) 일초지구(一草地區)와 수림대(樹林帶)가 지형(地形)과 입지환경(立地環境)에 알맞게 적절히 배치(配置)될 수 있는 방법(方法)의 연구(硏究)가 시급한 것으로 사료되었다.