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권영현,윤정목,김철기,한찬택 한국농공학회 1989 한국농공학회논문집 Vol.31 No.4
The purpose of this study is to seek out the harrow water requirement applicable for the irrigation plan of paddy field and to find out the factors influenced on a variation in the requirement. The plots of experiment were arranged with randomized block design which was compo- sed of three kinds of soil texture (sandy loam, loam and silty loam) and ploughing depth (12cm, 17cm, and 22cm). The results obtained from this experimental study are summarized as follows. 1. Harrow water reguirement is not only changed by soil texture, but influenced by soil water content just before irrigating 2. Magnitude of total harrow water reguirement appli(able for the irrigation plan, when surface water depth and the water content just before irrigating is fixed on the basis of 30 mm and a shrinkage limit respectively, generally becomes to be 177.5mm, 116.3mm and 113. 8mm in the sandy loam, loam amd silty loam block, respectively. 3. The more a percolation of soil layer occurs, the more the harrow water requirement increases, but it is not much influenced by the increase in ploughing depth. 4. The larger a porosity of soil layer is, the more a net harrow requirement increases 5. The factors that influence on a variation in the harrow water requirement are appea- red to be percolation of soil layer, soil water content just before irrigating, porosity of soil layer, ploughing depth and designed surface water depth etc.
써레질 용수량(用水量)과 지배요인(支配要因)에 관한 시험연구(試驗硏究)
권영현 ( Kwun Yong Hyun ),윤정목 ( Yun Joung Mok ),김철기 ( Kim Choul Kee ),한찬택 ( Han Chan Taek ) 한국농공학회 1989 韓國農工學會誌 : 전원과 자원 Vol.31 No.4
The purpose of this study is to seek out the harrow water requirement applicable for the irrigation plan of paddy field and to find out the factors influenced on a variation in the requirement. The plots of experiment were arranged with randomized block design which was composed of three kinds of soil texture (sandy loam, loam and silty loam) and ploughing depth (12cm, 17cm, and 22cm). The results obtained from this experimental study are summarized as follows. 1. Harrow water reguirement is not only changed by soil texture, but influenced by soil water content just before irrigating 2. Magnitude of total harrow water reguirement applicable for the irrigation plan, when surface water depth and the water content just before irrigating is fixed on the basis of 30mm and a shrinkage limit respectively, generally becomes to be 177.5mm, 116.3mm and 113. 8mm in the sandy loam, loam amd silty loam block, respectively. 3. The more a percolation of soil layer occurs, the more the harrow water requirement increases, but it is not much influenced by the increase in ploughing depth. 4. The larger a porosity of soil layer is, the more a net harrow requirement increases 5. The factors that influence on a variation in the harrow water requirement are appeared to be percolation of soil layer, soil water content just before irrigating, porosity of soil layer, ploughing depth and designed surface water depth etc.
장준혁(Jun Hyuk Jang),윤정목(Jeong Mok Yoon),박률(Lyool Park) 대한설비공학회 2019 대한설비공학회 학술발표대회논문집 Vol.2019 No.-
Recently modern people spend more than 80 percent of our day indoors, so the importance of indoor air quality is increasing day by day. Tobacco smoke, one of the things that has a bad effect on air quality, is one of the lingering. Among the harmful substances in cigarette smoke, radon, formaldehyde, carbon monoxide, carbon dioxide and fine dust are the main factors that adversely affect the quality of our air. Measurement of air quality through moisture content to solve this problem shows that moisture does not affect air quality reduction, given that substances such as fine dust, carbon dioxide, and formaldehyde increase during humidification.