Online Phenology Models and Degree-day Calculator
winter wheat
crop model of Karow etal 1993

Output from crop degree-day/phenology model program:
	Heat Units and predictions of key events from daily weather data
==============================MODEL INPUTS================================ Model species/general links: winter wheat Type: crop Model source/other links: Karow etal 1993 Calculation method: simp avg/grow Lower threshold: 32 degrees Fahrenheit Setting upper threshold to: 130 F (default) Directions for starting/BIOFIX: nominal date Starting/BIOFIX date: 1 1 No ending date, set to: default date 12 31 Model validation status: new prototype version - Contact Russ Karow at Region of known use: Pacific Northwest ==============================EVENTS TABLE================================ 1. 144 GDD after planting germination complete 2. 324 GDD after planting emergence complete 3. 504 GDD after planting 1st leaf fully developed 4. 684 GDD after planting 2nd leaf fully developed 5. 864 GDD after planting 3 leaves, T0 (coleoptile tiller) 6. 1044 GDD after planting 4 leaves, T1 (1st node tiller) 7. 1224 GDD after planting 5 leaves, T2 (2nd node tiller) 8. 1404 GDD after planting 6 leaves, T3 (3rd node tiller) 9. 1584 GDD after planting 7 leaves, T4 (4th node tiller) ==============================MODEL OUTPUT================================ Weather station: 1000 none selected mn day max min precip DD32 CUMDD32 event -- --- ----- ----- ------ ---- ------- -------