Water savings can be maximized throughout a growing season by knowing when to schedule your last irrigation. We have provided you with a PDF document with a guide on making this decision, along with a formula that can be used to determine this value. The PDF link below provides information on scheduling the 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%
I am using 15% below MWB
WN = Water Needs (How much water do we need to get to maturity?)
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%
I am using 15% below MWB
WN = Water Needs (How much water do we need to get to maturity?)
