Battery-free Battery-free wireless sensing 1 Center pivot irrigation systems 1 Data acquisition 1 Digital storage 1 Electric batteries 1 Food quality and safeties 1 Food quality and safety 1 Food safety 1 Food storage 1 Forecasting 1 Fruit monitoring 1 Fruits 1 High power 1 Irrigation 1 Irrigation systems 1 Moisture control 1 Moisture meters 1 Moisture sensor 1 Moisture sensors 1 Monitoring 1 Near field communication 1 Near-filed 1 PV irrigation system 1 PV powered 1 Performance 1 Photovoltaics 1 Sensor systems 1 Sensor tag 1 Sensors data 1