Interactive soil moisture interface of multi-depth change over time

Gallacher, David , Roth, Guy , McBratney, Alex

2023-01-01 COMPUTERS AND ELECTRONICS IN AGRICULTURE 2023   204(卷), null(期), (null页)

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Estimation of soil moisture throughout a crop root zone (nowcasting) is prone to spatial error, even when the time variable (forecasting) is removed. Measurement at discrete points in the field is now common using multi -depth sensors reporting at high temporal resolution, e.g.; every 15 or 60 min. The agricultural industry standard for data representation is suitable for prescriptive applications such as irrigation scheduling but is inadequate for descriptive applications such as reviewing change through a rainfed growing season. We developed an inter-active interface for animating past data and tested it on 61 EnviroPro (R) capacitance probes for up to 24 months starting mid 2019. Probes were installed in grey vertisol cropping soils of northern NSW, Australia, which contract when dry to produce deep cracks. When static, the interface highlights change in moisture at each level to the present date, with a default value of seven days. The interface shows these values against historical ex-tremes for the installation duration. When animated, the interface enables exploration of soil moisture change over one or more seasons by depth and crop phenology. We believe this descriptive use of data improves un-derstanding of crop-water relations, particularly for dryland crop production systems where management de-cisions are reliant on longer-term projections.