Corn Irrigation Scheduler

Growth Stage

- GDU accumulated

Current ET Demand

in/day at current stage

7-Day Rain Forecast

inches expected

Water Deficit

running balance

Drought Status

ERA5 soil moisture

Trigger Threshold

MAD x AWC x root zone

Corn Growth Stage Progress

Water Balance - Past 14 Days + Forecast

Cumulative Seasonal Water Use - Planting to Present + Forecast

Daily Water Balance

Date	Stage	Rain (in)	ET (in)	Solar MJ/m2	Net (in)	Deficit

ET: FAO-56 Penman-Monteith from Open-Meteo solar, temperature, humidity and wind data. Crop coefficients (Kc) from University of Illinois and University of Nebraska-Lincoln corn water use research. Drought status from ERA5-Land soil moisture anomaly vs 15-year baseline (Open-Meteo archive). Trigger = AWC x MAD x root depth. GDU: base 50F cap 86F.