As well as providing individual metrics like rainfall and
soil moisture, Sensing+ combines data from your sensors and transforms it into new
pieces of information.
A classic example is evapotranspiration (ETo), which can
more easily be described as crop water use. This refers to water loss from soil
and plants through a combined process of transpiration (from plants) and
evaporation (from soil). It is one of the key determinants in estimating when
and how much to irrigate.
ETo is calculated based on a standard grass sward. To
identify the evaporation and transpiration for individual crops, it can be adjusted by
a crop coefficient to create an ETc reading. ETc is ETo combined with a crop
Both ETo and ETc are measured by combining solar radiation,
air temperature, relative humidity and wind speed and direction. These individual units are first recorded by Sensing+, before being converted into ETo and ETc.