Hay Cut GDD Calculator
Track growing degree-day accumulation between hay cuts using the same PEI station weather archives already published in this project.
70 mapped stations
Click the map to open a larger view. Hover over a station marker to see its name.
Calculator setup
Select stations, define the cut window, and compare the accumulated GDD against rough planning ranges for each hay type.
Use the searchable checkbox list instead of Command-click. The hidden selector stays in sync for saved setups and report generation.
Cut reset dates
Enter completed cut dates to reset accumulation. If the target cut date itself is filled in, the report treats that cut as completed. Otherwise it runs through the selected report end date.
Custom planning range override
Use this if you want to override the rough default GDD planning ranges for your hay type.
Before acting on this report, confirm crop stage, field conditions, scouting observations, product labels, and local regulations.
Choose stations and click Generate hay cut report.
Planning legend
These are rough planning ranges for cut-to-cut accumulation. They are not hard thresholds and should be refined with local forage goals, stand health, and harvest quality targets.
| Hay type | Cut 1 | Cut 2 | Cut 3 | Cut 4 |
|---|
Suggested ranges are meant as a conversation starter for growers, not a replacement for field observation or forage quality sampling.
Saved forage fields
Save a field, weather-station selection, and cut history so you can reload the same setup later and keep counting from each cut.
Saved field setups stay in this browser unless you clear local storage.
| Field | Stations | Hay type | Basis | Target cut | Saved | Actions |
|---|
Report output
Each row shows one station’s accumulation window for the selected cut and selected accumulation basis. Completed cut-to-cut segments are listed separately above the main report so growers can keep a running record by field and station.