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Determination of Sensor Locations for Monitoring of Soil Water Content in Greenhouse
1S. Chung, 1Y. Huh, 3J. Choi, 1D. Ryu, 1K. Kim, 3H. Kim
1. Dept. of Biosystems Machinery Engineering, Chungnam National University, Daejeon, Republic of Korea
2. Dept. of Biosystems Machinery Engineering, Chungnam National University, Daejeon, Republic of
3. College of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
4. Crop Resource Research Division, Chungnam Agriculture Research & Extension Services, Republic of Korea
 Monitoring and control of environmental condition is highly important for optimum control of the conditions, especially in greenhouse and plant factor, and the condition is not uniform within the facility. Objectives of the study were to investigate variability in soil water content and to determine optimum sensor locations for better irrigation control. Experiments were conducted in a strawberry-growing greenhouse (greenhouse 1) and a cherry tomato-growing greenhouse (greenhouse 2). Soil water content, electrical conductivity (EC), and temperature were collected over the entire area, different distances from an irrigation pump, and ridge and furrow. Soil water content was highest near the starting point of irrigation, and overall difference was about 3%. Different between water contents at ridge and furrow was in a range of 10.2~18.4%. EC was lower at ridge than at furrow, but temperature was not different.
 
Keyword: Greenhouse, Soil water content, Monitoring, Variability, Sensor location
S. Chung    Y. Huh    J. Choi    D. Ryu    K. Kim    H. Kim    H. Kim    Precision Horticulture    Poster    2012
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