Evaluation of DualEM-II sensor for soil moisture content estimation in the potato fields of Atlantic Canada
2019
Farooque, Aitazaz A. | Zare, Mahnaz | Abbas, Farhat et al.
The conventional gravimetric methods of estimating soil moisture content (?) are laborious, time-consuming, and destructive to agricultural fields. We evaluated the performance of DualEM-II sensor in non-destructive way of ? prediction and for predicting ? variations within potato fields in Atlantic Canada. Values of ? were measured from four potato fields in New Brunswick and Prince Edward Island using a pre-calibrated (R2 = 0.98) time domain reflectometry (TDR) from root zone of potato tubers under grid sampling arrangements. Horizontal co-planar (HCP) and perpendicular co-planar (PRP) readings were taken using DualEM-II sensor from the same locations of ? measurements. There was a better correlation between PRP and ? (r: 0.64-0.83) was calculated than between HCP and ? (r: 0.41-0.79). There was no significant difference (R2: 0.60-0.69; RMSE (root mean square error): 2.32-4.02) between the ? values measured with TDR (?M) and those predicted with DualEM-II (?P) confirming that the use of electromagnetic induction technique, evaluated during this study, is labor saving, quick, non-destructive, and accurate and can be considered a precision agriculture tool for efficiently managing soil water in potato fields.
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