Probe for Windows calculates how much water should be applied ScheduleAmount, and when ScheduleDate.
Soil Water Depletion Rate, or Crop Daily Water Use (CDWU), can be calculated from one of...
For the remainder of the season (after the next irrigation), Crop Daily Water Use is calculated from...
Amount changed by user The calculated ScheduleAMT and ScheduleDate are shown (top right), and can be changed by the user.
The value will revert to calculated when a new reading is posted; or double-click the value; or
All options and user-entered values are site-specific, unless marked as global or local - see here
A summary of current state of the site
Upper and Lower limits Formulas to calculate the UPPER and LOWER limit values - see details
eg Upper: FULL
Check formulas Enter a formula and a date, and the value.
exports Upper/Lower/ET/Kc values to .csv files.
Total of all irrigations and rainfalls in the season
Continous (Drip) Row, plant, emitter spacing, etc (cm, ins) are used to calculate delivery rates.
Max delivery hours per day - may limit the calculated Schedule Amount.
Non-drip (Cyclic, Cyclic-7days) calculates the delivery rate (Ml/day) from Delivered Volume (Kl, ML, kGal) and Delivery Time (hours).
Position (0-100, default=0) is the position of the monitoring tube relative to the length of the site (0=head ditch, 100=tail ditch).
The value is used to adjust the schedule date and start time to account for the time water will take to reach the tail drain.
The Area (Ha, Acre) of the site is used to calculate volumes of water
The Delivery Factor (default = 1) allows for discrepancies between calculated amount and the actual amount required for this site
See (Units
Probe for Windows calculates how much water should be applied (ScheduleAMT) and when (ScheduleDate) using three methods...
The calculations are done at daily intervals.
The soil depletion rate is Crop Daily Water Use (>CDWU
Forecast rain can be optionally included - see predicted rain
The calculated Schedule Date and Schedule Amount can be changed by the user on tab: Schedule (top right).
The changed values will be re-calculated when a new reading is posted, or use or double-click ???.
Chop-Gains-to-Full If (global), assumes a free-draining soil and any rain that takes RZ1 above FULL is assumed to be wasted, and RZ1 will be set to FULL
This setting is global, but should have been be soil-specific.
Could be implemented using Soil Factor, with a high drainage rate when RZ1 close to FULL (Field Capacity).
Crop Factor A value (default=1) or a formula using a .kc
file, used to calculate Crop Daily Water Use
Schedule amounts below 5mm can be set to zero (global)
Crop type
Even more options...
ProbeDWU - Handle problems if being used to schedule irrigations.(global)
DWU formula in keydata If a keydata DWU formula is being used to schedule, the key data row needs to be selected.
Weather
Soil Facter
Schedule Untill Schedule can be shown up to the end of season (local)
Save Schedule Amount The calculated Schedule Amount can be saved as a key data item, so that the relationship between scheduled, delivered and effective can be graphed and assessed.
Allow changing amount and date Users can change the calculated schedule amount and date (local)
Local settings are saved on the PC, and can be different for each PC on a network [PRWIN.INI
]
Global settings are saved in the shared/
folder, and will be the same for every PC [SHARED/PRWINSHARED.INI
]
Sites settings are saved with the site (although could be global)