| doggone - 12/18/2022 09:26
For those posting about their experiences with pivot bio or any other biological do this math and post your results please.
Nitrogen use efficiency ratio. Take total Nitrogen applied divided by bushel per acre. Ez. 175#N/230 bushel yield. 175/230=.76 NUE
If your NUE is higher .76 I can assume seeing any gain of a biological would be close to zero. As NUE gets closer to .5 then you would start seeing a result of a biological.
If you are using 100% pre plant or at planting Nitrogen application your chance of seeing a return to a biological would be lower then someone doing a split application.
If you are using anhydrous as a side dress it would be safe to assume that you will not see any result of a biological.
I guess I would tend to disagree. I hate using a broad brush to paint things like that. Suggesting a hard NUE number like that would be something the universities try to do. It does not take in this years weather, the previous years crop and weather, or if a cover crop was used, or even soil OM. .76 might be your number because that is the place where your other fertility is yield limiting. Correct your other fertility and that number may go up....or down as your yield potential changes..
Again based on the data, I would disagree with your premise of all upfront you will not see a response. If you are way over applying, you won't. But if you are in the ballpark and use the N credit from PB in your applications accordingly to end up with the same N amounts, then you should. When the planter leaves the field here, there is already enough N out there that most would say that enough for the year. Yet even with that much out there, our tissues suggested it was working and yielded accordingly.
I also would disagree about the side dress comment as well. It could because nothing works all the time, but you could end up shorting yourself on N early because the plan was to side dress NH3. And either you didn't get there in time, or it was stupid wet and what N that was put out there didn't last. Again , early N levels are important it appears based on the data and while PB isn't going to help you after tassel much directly, the synthetic N applied could still be there unused.
Edited by NEIAAG 12/18/2022 14:40
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Pivot Bio ?
