Scheduling Last Irrigation Guide

Scheduling Last Irrigation Guide

How To: Scheduling Your Last Irrigation

Water savings can be maximized throughout a growing season by knowing when to schedule your last irrigation. 

When should I schedule my last irrigation?  

  







Irrigations Left =   (WN -ra) – (WB – MWB)                                
                                             WN                        

Where:                                
    ra = rainfall allowance (How much rain do you expect between now and black layer?)                                
    WB = water balance (What is the current volumetric water content of the soil?)                                
    MWB = Minimum Water Balance (What volumetric water content do you want to end        up with?)                                
    PHEWB = Post Harvest Ending Water Balance                                
        Normally we will plan on reducing available water to 30-40%                                   
    WN    = Water Needs (How much water do we need to get to maturity?) 

                                 
      


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