Last week balance
PEI irrigation report
Greenwich
Weekly irrigation outlook for Potato at Greenwich. Last recorded station day: 2026-07-11.
PEI weather stations
70 mapped stations
EPAA (1)UPEI (46)PEI Department of Agriculture (13)Private (2)Government (8)
Click the map to open a larger view. Hover over a station marker to see its name.
External station page: https://www.licor.cloud/dashboards/52ebd042-9f5c-4bb1-b221-3da5a1d29440/true?filters={%22davra-timeselector%22:{%22type%22:%22relative%22,%22unit%22:%22days%22,%22value%22:5,%22live%22:false}}
Decision-support only: Model outputs depend on weather data, user inputs, and biological assumptions. Verify results with field scouting, local field conditions, product labels, agronomic advice, and applicable regulations before acting.
Daily rainfall
0.0 mm
Weekly rainfall
2.8 mm
Avg daytime temp
24.0 C
Avg nighttime temp
14.2 C
Potato heat units since planting
Set planting date
Current moisture
n/a
Water content
n/a
Electrical conductivity
n/a
Soil status
Unknown
Soil moisture guide
Use these % VWC ranges as a quick grower-facing guide when reviewing soil moisture on the station pages.
| Moisture Status | % VWC | What It Means for Your Crop |
|---|---|---|
| Severely Dry | < 13% | The soil is running on empty and potatoes are stressed. |
| Moderately Dry | 13-17% | Soil moisture is getting low and should be watched closely. |
| Optimal | 17-23% | Just right for healthy potato growth. |
| Full (Field Capacity) | 23-25% | The soil is full of water but not yet saturated. |
| Saturated / Wet | > 25% | Too much water and drainage or drying time may be needed. |
Season % VWC trend
Shows this station's seasonal % VWC trace from the first available day this season. Planting date and any stage changes you make in the weekly table appear here as vertical markers.
Weekly water balance
Weekly rain and irrigation compared with crop water use, so you can see where the field likely gained or lost moisture.
Showing full season
Weekly rain
Weekly ETc
Surplus 0.0 mm
Deficit 0.0 mm
Planting date
Growth-stage marker
Weekly summary table
Use this table to compare weekly rainfall and irrigation against estimated crop water use. You can change the growth stage and irrigation directly in the table.
| Week Ending | Growth Stage | Crop | Mean Temp | Mean Solar | Rain | Irrigation | Total Input | ETo | ETc | Surplus/Deficit | Weekly P-Days | Season P-Days | Weekly GDD | Season GDD | Reserve | Depletion | Refill | Avg VWC | Avg Water Content | Avg EC | ETo Method |
|---|
Saved Field Irrigation Plans
Save the current planting date, growth-stage, and irrigation setup with a name, then load it later for this station.
Using the farm default growth-stage schedule.
| Plan Name | Planting Date | Saved | Changed Weeks | Actions |
|---|
Permanent local archive
Every saved, overwritten, or deleted field irrigation plan is kept in this browser and cannot be removed from this archive from the page. Use Restore to push an archived plan back into the active list.
| Plan Name | Action | Saved | Planting Date | Changed Weeks | Actions |
|---|
How to use this report
Rain plus irrigation gives total water in. That total is compared with estimated crop water use to show whether the field likely ran a weekly surplus or deficit.
ETo is the reference evapotranspiration estimate. ETc is crop evapotranspiration, which applies the crop-stage factor for the current growth stage so the estimate is more field-relevant for potatoes.
This report supports three models: corrected Hargreaves, FAO-56 Penman-Monteith, and a sensor-based water balance. Hargreaves is the simpler temperature-driven estimate, Penman-Monteith is the standard weather-driven method, and Sensor uses field moisture response where enough data exists.
Corrected Hargreaves form used in this report
ETo = 0.0023 x (Tmean + 17.8) x sqrt(Tmax - Tmin) x Ra
Ra is extraterrestrial radiation estimated from PEI latitude and day of year. Penman-Monteith uses station solar radiation, humidity, and wind when present. The sensor model estimates reserve, depletion, and refill from soil moisture response and rainfall plus irrigation.
Growth stage follows the station calendar unless you change it in the table or save a field irrigation plan with its own planting date. When a planting date is chosen, the report automatically treats the two prior weeks as Pre-Plant.
- Sensor model returns n/a until there are enough soil-moisture observations to estimate field capacity and weekly reserve changes.