Spatial Sensitivity and Calibration of 10HS Soil Moisture Sensors in Converted Paddy Fields for Practical Use

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
This study confirmed a utility of a 10HS sensor, a capacitance sensor, in converted paddy fields to exploit the practical influence volume from our results and the corrected FSC function. Converted paddy fields in Japan are typically used to cultivate lowland rice or upland crops, and many of them have a problem of poor drainage when upland crops are cultivated. One of the major causes of poor drainage is a presence of a hardpan layer due to soil puddling for lowland rice cultivation. To monitor soil moisture above the hardpan layer without the influence of the hardpan layer, we identified the spatial sensitivity around the sensor and determined the applicability of the sensor with the factory-supplied calibration (FSC) function, including under near-saturated conditions. As a result, regarding the spatial sensitivity, the influence volume of the sensor from our result is much smaller than that reported by Cobos (2008), and we suggested that the sensors should be installed at least 1.5 cm above the boundary between the hardpan and plowed layers. Moreover, regarding the calibrations of the sensors, a corrected FSC function that can account for the bulk density was proposed.
作成者 Chika ZUKEMURA Teruhito MIYAMOTO Hiroshi OSARI
著者キーワード bulk density factory-supplied calibration function hardpan layer influence volume near-saturated condition
公開者 Japan International Research Center for Agricultural Sciences
受付日 2022-08-16
受理日 2023-03-23
開始ページ 299
終了ページ 310
DOI 10.6090/jarq.57.299
言語 eng