This discusses how changing the variance value in the turfgrass growth potential equation will change the shape of the curve as one moves away from the optimum growth temperatures. 

• PACE Turf: https://www.paceturf.org/ 
• Climate appraisal forms with GP equations included: https://www.paceturf.org/index.php/journal/climate 
• Watch this episode at: https://youtu.be/HBquDPySSto
• ATC Office Hours with Dr. Larry Stowell discussing GP: https://youtu.be/oZgXv3ZaHkQ 
• ATC website: https://www.asianturfgrass.com/ 
• ATC newsletters: https://www.asianturfgrass.com/#newsletters 
• I started showing these slides on Turfgrass efficiency: the best playing conditions with the fewest inputs https://speakerdeck.com/micahwoods/turfgrass-efficiency-the-best-playing-conditions-with-the-fewest-inputs

Find out more about soil tests with ATC at https://www.asianturfgrass.com/project/soil-tests/