#$%^&*AU2017100206A420170323.pdf#####- 26 ABSTRACT A method for use in performing quantitative water irrigation of an area of soil planted with a particular crop, the method being performed using one or more electronic processing devices, the method including: receiving, from at least one soil moisture sensor located in the soil, at least one moisture measurement indicative of a moisture content of the soil； determining whether irrigation is required based on the at least one moisture measurement； in response to determining that irrigation is required, determining an irrigation quantity indicative of a quantity of water to be supplied to the area of land over a subsequent time period by: obtaining, from a meteorological data source, meteorological data for a geographical region corresponding to the area of soil for a prior time period； determining at least one evapotranspiration value for the prior time period based on at least some of the meteorological data； and calculating the irrigation quantity based at least in part on: crop data for the particular crop； and the at least one evapotranspiration value. Fig. 11/6 100 Receive moisture measurement from soil moisture sensor 110 Determine whether irrigation required based on moisture measurement 120 Obtain meteorological data from meteorological data source 130 Determine evapotranspiration value for prior time period 140 Calculate irrigation quantity based on crop data and the evapotranspiration value 150 Control irrigation system to supply determined _ quantity of water Fig. 1
