Link to Data Chart (ET vs. Air temp) https://sprinklernerd.com/evapotranspiration-vs-air-temperature ----------------------------------------------- BAM! We're on fire today, guys. This is the end of ET. End of it. End of ET. Do I have your attention? Think about it. This is the end. The end. This is the end. The end. End, my friends. All right. Hopefully I do have your attention. Because... I just want to make you think. You guys know me by now. I love thinking of things upside down, sideways, backwards. Just think of something in a way you've never thought of it before, and when I say this is the end of E. T., what does that mean to you? I'm just gonna sit here for a minute and let you think about that. When I say the end of E. T., what does that mean to you? Hmm. Does it mean we're never going to use ET again? Possibly. However, ET is a uh, known good formula. It's a very detailed calculation that probably took whoever came up with it, Edmund Monti, lots and lots of research to figure out. So, I don't, I personally don't think it's the end of EET in terms of we're never going to use it again. I guess what I wanted to, what I want you to think about is that is it the right tool to determine how much water we should apply to the landscape right now? For that purpose, I think this is the end of et not today 'cause this is still how we're watering. But if we fast forwarded 20 years, will we be using ET to determine how much water to apply to the landscape? Right now? At this moment I want you to go out to your landscape, to your project and I want you to water turn on the sprinklers. How long? Should you water the landscape right now? How long should you water it? Will you, will you look at yesterday's wind speed, yesterday's temperature, yesterday's solar radiation, yesterday's humidity? Will you look at yesterday's Cite environmental data to determine how long to water today. Right now, I don't think you will , so when I say it's the end of et, we are in the transition zone. We are in the transition zone of taking a mechanical. system, a turn on now for 15 minutes every Monday, Wednesday, Friday at 6 a. m. We're in the middle of that transition to a automated system that can apply the right amount of water. Right now, in real time. And the only way to do that is to put a sensor in the soil. So this is a long winded way of saying my prediction is that this is the end of ET as a real time automation tool. ET will become the Will become, and actually is right now, the only tool and the best tool to predict water usage, to run calculations, to forecast, to run, uh, forecasting models. It's the only tool for that, but it's not the right tool to automate the irrigation system right now, here, today. So I'm going to start talking more about soil moisture sensors, how they work. You know, the ups, the downs, the, the, the good, bad, and the ugly. But I kind of wanted to just frame this episode around the end of ET number one to get your attention. But number two, so that you can understand where is it, where is et the right tool for the job? And in my opinion, the right tool for the job is for forecasting, calculating estimating, but it's not designed for real-time watering. It's not designed to. Be the tool to water until the ground is at field capacity and stop watering. If I told you to go outside right now and only put down enough water so that the soil reaches field capacity and turn it and it turns off, would you really use yesterday's weather data to run a calculation for that? All right, I'm in the weeds a little bit, but that's the that's my topic for today. And I ran. An experiment that really got me excited. It has to do with ChatGPT, and I asked ChatGPT a really cool question that had some amazing results, and what's kind of fun about ChatGPT is that it doesn't have a It doesn't have a, you know, a horse in the race. It doesn't care who's right or who's wrong. It's very, uh, sort of factual. You know, so