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Forward autograph note

foreign welcome to a special year end miscellany edition of the ATC double cut with myself Michael Woods I am the chief scientist and president of the Asian Turfgrass Center and the director of the payster information service and in this episode I want to talk about a few recent blog posts that I've made that uh kind of wrap up the year and one of them especially that I think um I I've talked with people about this but I don't know that I've blogged about it so much I don't know that I've written about it so much it's something that it seems like I've spoken about it at some seminars and certainly talked with my friends about it and told people I'm going to write something about this some more in the future and uh I I finally got around to doing a blog post about it and that blog post is one that I gave a title of planning forwards and measuring backwards now this is something that I didn't do when I was a golf course superintendent about 20 years ago more more than 20 years ago now um and it's not the way that I was thinking about 10 years ago but it's the way that I would make some decisions about Turfgrass management today and it's related to making plans for how much sand to apply for example or making plans for how much fertilizer to apply but then discarding the plan essentially on the day that it's time to make the application now the reason why I think it makes sense to discard the plan is because we could be measuring things today like how much the grass is growing the clipping volume or we could be measuring how much organic material is in the soil and how that's changing over time so if we know those kind of numbers we can look backwards and we can look at what's actually happening and we can adjust based on that so I think I will use a specific example which is nitrogen fertilizer and try to explain that because I know there's a lot of people around the world who use the growth potential model to come up with some idea of the maximum nitrogen amount to apply at any amount at any point in time for their site based on what the temperature is because if the temperature is very cold the grass won't grow so it doesn't need any nitrogen and if the temperature is close to an Optimum level for photosynthesis if the temperature for example is about 70 degrees Fahrenheit on average for cool season grass or 20 degrees Celsius for cool season grass we could expect that cool season grass could photosynthesize very efficiently at that temperature and because of that it would have a higher nitrogen requirement or a higher nitrogen use rate than it would when the temperature was zero and the grass wasn't growing at...