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Tag: growing degree days

The impact of different PGR reapplication models on the turfgrass quality of a creeping bentgrass fairway mowed at 0.4 inch. (Photo by: William Kreuser, Ph.D.)

How to guide PGR applications by growing degree days

June 4, 2021 By
At the University of Nebraska, our lab has been creating models to predict the duration and performance of plant growth regulators (PGRs) using growing degree day (GDD) models. We have more than 570 different models specific to grass species, the ...

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Figuring growing degree days: hard and easy

December 15, 2014 By
For those who love arithmetic, you can work out the number of growing degree days by figuring the cumulative average of the daily minimum and maximum temperatures in Celsius and dividing by two. As the days pass, add up the ...

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Improving PGRs by degrees

December 15, 2014 By
We all improve our turf skills by degrees. One way to improve effective use of PGRs is by tracking growing degree days. Growing degree days (GDD) are figured by taking the average of the daily maximum and minimum temperatures compared ...

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Spring triggers growing degree-days in turf

February 12, 2014 By
With the arrival of spring, the warmth of the sun is most evident. As temperatures increase, plants and living organisms begin to grow and develop. Temperature is the driving force for all biological activity. One method of using temperature to ...

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Trinexapac-ethyl applications and growing degree days

July 30, 2013 By and
Doug Soldat, Ph.D., is an associate professor of turfgrass science at the University of Wisconsin-Madison. His research has focused on turfgrass and soil problems. He can be reached at djsoldat@wisc.edu. Question: How did you become interested in investigating the timing ...

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