김재영 Jae Young Kim , 손재권 Jae Gwon Son , 구자웅 Ja Woong Koo , 최진규 Jin Kyu Choi

DOI: Vol.8(No.1) 3-9, 2002

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Changes of chemical properties by times of the reclaimed tidal land soils and soil surface water, underground infiltration water with precipitation-runoff on natural meteological condition in the unripened tidal reclaimed paddy fields were investigated. This study was carried out to use environment-friendly farm land in the reclaimed tidal lands. The soils used in this study were saline-alkaline soils with the high Na^+ and Mg^++ content. As the results of investigation outflow loading of nutriments through outflow water in the unripened tidal reclaimed paddy fields by precipitation during the survey period, nutriments equivalent to T-N 1∼2 kg 10a^-1 and T-P 0.01∼0.02 kg 10a^-1 from in the unripened tidal lands were discharged. Besides, the results of comparison losses of cation through outflow water showed Na^+＞K^+＞Mg^++＞Ca^++, and the highest appeared water discharge of Na^+. In case of saemangeum reclaimed tidal land soils water discharge of cations showed Ca^++ 1.3 kg 10a^-1, Mg^++ 1.6 kg 10a^-1, Na^+ 17.7 kg 10a^-1, and K^+ 3.2 kg 10a^-1 respectively. On the other hand, in case of koheung reclaimed tidal lands soils water discharge of cations showed Ca^++ 18.1 kg 10a^-1, Mg^++ 31.2 kg 10a^-1, Na^+ 320.8 kg 10a^-1, and K^+ 51.2 kg 10a^-1 respectively.

윤광식 Kwang Sik Yoon , 한국헌 Kuk Heon Han , 조재영 Jae Young Cho , 최창현 Chang Hyun Choi , 손재권 Jae Gwon Son , 최진규 Jin Kyu Choi

DOI: Vol.8(No.1) 15-25, 2002

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The study was carried out to investigate the water balance and losses of nutrients from paddy fields during cropping period. The size of paddy fields was 95 ha and the fields were irrigated from a pumping station. The runoff loading was the highest in June because of the high concentrations of nutrients due to applied fertilizer. When the runoff losses of nutrients were compared to applied chemical fertilizer, it was found that 39.1 % to 42.5 % of nitrogen lost via runoff while runoff losses of phosphorus account for 14.5 % to 17 % of the total applied amount during cropping period. When the ratio was calculated between nutrients losses by infiltration and the applied of chemical fertilizer, two year results showed 9.1 % to 10.8 % for nitrogen and 0.5% for phosphorus, respectively.

손재권 Jae Gwon Son , 구자웅 Ja Woong Koo , 최진규 Jin Kyu Choi

DOI: Vol.8(No.1) 26-40, 2002

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In order to plan the effective irrigation project in unripened reclaimed paddy fields, the estimation of criteria of irrigation water requirements for the normal growth of crops is very important. This study was carried out to determine the leaching requirements before cultivating crops, the consumptive use of water by the growth of crops, and preventive water requirements of resalinization during the growth period in unripened reclaimed paddy fields. The irrigation water requirements in good permeable soils were estimated as 2,530mm for culvert treatment(S1CW3) and 3,080mm for non-culvert treatment(S1NW4), which were 1.8 times and 2.4 times as high as the irrigation water requirements in common rice fields, respectively. And, in case of poor permeable soils, 3,360mm for culvert treatment(S2CW4) and 3,580mm for non-culvert treatment(S2NW4) were estimated, which were 2.5 times and 2.8 times higher than the normal irrigation water requirements, respectively.

박영춘 Young Choon Park , 이성우 Seong Woo Lee , 민성희 Sung Hee Min

DOI: Vol.8(No.1) 41-59, 2002

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The condition and management of land resources has become an increasing matter of concern in recent years, because of the pressure placed upon land for agricultural use by expanding populations and economic development. Pressures upon land quality can lead to various forms of land degradation, such as in soil erosion, soil fertility decline, adverse changes in water resources, salinization of irrigated areas, or decline in the biological condition of forests or rangelands. In 1992, World Bank estimates that the cost of degraded areas has been estimated as 10-50 times higher than that of measures to prevent degradation. Based upon a survey interviewed with people living in rural areas, the present study argue that it is important to establish policies for preventing changes in agricultural land use, to provide early warning of adverse trends and identification of problem areas. The present study also stresses that stewardship of agricultural land use, to provide early warning of adverse trends and identification of problem areas. The present study also stresses that stewardship of agricultural land resources plays a leading role in achieving sustainable rural development not to mention agricultural and forestry production.

진영민 Young Min Chin , 박승우 Seung Woo Park , 김상민 Sang Min Kim , 강문성 Moon Sung Kang , 강민구 Min Goo Kang

DOI: Vol.8(No.1) 60-68, 2002

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A Modified CREAMS model, CREAMS-PADDY was developed to simulate the hydrology and nutrient transport at an irrigated rice paddy. The hydrology at a paddy was simulated by a daily water balance routine which reflects daily inflow, outflow, and water level changes. The soil erosion was simulated using modified USLE. The nutrient transport for total nitrogen and phosphorus were depicted for various phases of each constitute such as extraction, percolation, mineralization, and plant uptakes. Field monitoring was conducted to investigate the water quality changes at a paddy field at three times a week during the growing season of 1996. The proposed model simulates the water quality of the paddy reasonably well, and is found to be applicable to field conditions.

윤광식 Kwang Sik Yoon , 한국헌 Kuk Heon Han , 최진규 Jin Kyu Choi , 구자웅 Ja Woong Koo , 손재권 Jae Gwon Son , 조재영 Jae Young Cho , 조진구 Jin Goo Cho

DOI: Vol.8(No.1) 69-76, 2002

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A study was carried out to investigate the losses of sediment at a paddy plot located at the southern Korea. The observed amount of precipitation, irrigation, runoff for the experimental paddy plot during the cropping period were 1,030, 566, and 701 mm in 1999 and 1,214, 413, and 710 mm in 2000, respectively. The observed sediment losses from the plot during cropping period were 1,221.3 kg ha^-1 in 1999 and 1,274 kg/ha kg ha^-1 in 2000, respectively.

임승빈 Seung Bin Im , 신지훈 Ji Hoon Shin , 윤희정 Hee Jeong Yun , Sung Keun Kim

DOI: Vol.8(No.1) 77-84, 2002

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This study intends to classify and analyze the problem of rural villages on the basis of existing ecological and cultural resources. Based on the results of this study, rural villages in Korea can be divided into 4 types - ① the village abundant in both ecological and cultural resources, ② the village abundant in only ecological resources, ③ the village abundant in only cultural resources and ④ the village insufficient in two resources. And further, this study found that most ecological resources in rural villages are deteriorated or deteriorating. Even worse, the cultural resources are diminished or diminishing. It is suggested that the ecological and cultural resources need to be taken into account in the process of rural village planning.

최수명 Soo Myung Choi , 한경수 Kyung Soo Han

DOI: Vol.8(No.1) 85-93, 2002

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This study aimed at proposing policy improving directions of the rural empty homes grant scheme in Korea. The implementation procedures and results of the relevant schemes/projects on optimum use of rural empty homes at home and abroad were reviewed by literature and internet searches. From the reviewing results, a tentative set of policy directions for project improvement were proposed: extention of project scope to all the redundant resources, dual focussing of project objective on housing innovation and economic regeneration of communities, and systematization of project plan and implementation especially in the statutory aspects.

황한철 Han Cheol Hwang , 박선용 Sun Yong Park , 한경수 Kyong Soo Han

DOI: Vol.8(No.1) 94-104, 2002

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In spite of the importance of the farm area in Seoul, in providing fresh vegetables, a pleasant environment and a good quality of life for residents, rapid urbanization and industrialization have greatly reduced the farm area. The purpose of this study is to examine farmers` intentions and attitudes to provide supporting data for planning the strategy of urban agricultural development. All the collected data was analyzed using the contingency tables and the Chi-square test using the SAS computer statistical package. Based on analysis of the survey data, the leaseholders were found to be more satisfied with their job than the landowning farmers. Also, the small-scale farmers with green houses showed greater job satisfaction than the ordinary large-scale farmers. Farmers` views on the farming in Seoul were different depending on their status. Therefore, agricultural strategies in there should be considered their different attitudes.

허학영 Hag Young Heo , 남상채 Sang Chae Nam , 최상운 Sang Un Choi , 오민근 Min Geun Oh , 안동만 Tong Mahn Ahn

DOI: Vol.8(No.1) 105-113, 2002

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This investigation aims to provide basic data for rural village planning and rehabilitation planning. Public infrastructures of forty selected villages have been surveyed. Provision of facilities, user satisfaction, perceived problems, and conditions of maintenance have been surveyed for three classified types of infrastructures; 1) public utility spaces such as community hall, and parking lots, 2) public production infrastructures such as warehouses, and irrigation facilities, and 3) public infrastructures for living environments such as roads, water supply, and sewage system. All twenty smaller villages (ki-cho-ma-ul) had problems of poor conditions and insufficient spaces with community halls. Most of the smaller villages suffered from lack of public production infrastructures, or had problems of insufficient spaces and poor maintenance conditions. They also lacked good access roads with adequate right of ways. Only three villages were provided with sewage systems. In the twenty larger villages (myun-so-ma-ul), though public utility spaces were provided for most of them (as an example, sixteen villages had welfare centers), they were not large enough and they were maintained in poor condition too. On the one hand twelve of the larger villages had farm machine service centers, only a few villages were equipped with warehouses. Many more public infrastructures for living environments were found in larger villages. However, only a few villages had pollution control facilities. Multidimensional scaling revealed groups of distinctive characteristics, in terms of public infrastructures, among smaller villages. It did not show any noticeable distinctions among larger villages.