Journal of Food, Agriculture and Environment

Experimental study on optimal depth for burying soil moisture sensors for guiding tomato irrigation

Author(s):

Yuguo Han ¹*, Bo Li ², Qinghua Kong ³, Yunqi Wang ¹

Recieved Date: 2013-06-11, Accepted Date: 2013-09-18

Abstract:

Soil moisture sensor is of greater significance for timely irrigation and crop yield increase to use soil moisture sensors to measure soil water content so as to guide irrigation. Due to high cost of the soil moisture sensor, the investment in the irrigation system will necessarily increase and the promotion of the system will be affected if a large number of sensors are buried in different depths at the same soil profile. Therefore, determination of the optimal position for burying soil moisture sensors is quite important for wide application and promotion of the sensors since a general water condition of the whole soil may be obtained by using fewer sensors. In this paper, based on soil moisture data measured during the experiment, an optimal depth for burying soil moisture sensors is analysed for tomato irrigation. The results showed that soil water content in 10-20 cm layer can best reflect the mean soil water content in the designed irrigation layer (R² is above 0.95 and 0.85 at lowering and fruit bearing stage and fruit stage, respectively). Therefore, 10-20 cm layer is an ideal depth for burying soil moisture sensors.

Keywords:

Lower limit of irrigation, soil water content, soil moisture sensor, depth

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 3&4
Category: Environment
Pages: 1960-1963

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