“…Soil moisture [30][31][32][33][34][35], ambient humidity [36,37] Electrical conductivity Soil moisture [34,[38][39][40], soil and water pH [41], ambient humidity [34,42] Load cell Weight of harvested crops [43,44], crop waste [45] Electrochemical Ethylene concentration in crop storage [46], greenhouse CO 2 concentration [47,48], beehive monitoring [49] Optical Crop height measurement [50,51], livestock and predator monitoring [52], volume of harvested grain [53], plant mapping [54], NDVI [55], soil composition [56][57][58], N content [9,10,59], solar irradiance [60], plant disease detection [61], crop waste [45] Thermocouple, thermistor Seed and crop storage [62], greenhouse monitoring [34,48,63], soil temperature [34,64], water temperature [65] Pressure and flow rate Irrigation water flow [66], handpump ...…”