Colby, Kansas | 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.
People farming in areas where residual nitrate exists in the soil profile (e.g. Western Corn Belt) should be quite cautious about this method of calculating nitrogen use efficiency. If you don't know what your profile N was before or after the crop, this number isn't telling you a whole hell of a lot.
The only way to fairly evaluate PivotBio is at the same sub-optimal N rate with and without the PivotBio. Ideally, you would have an entire range of N rates each with and without. That's not easily done on-farm, but is how a well constructed research trial would look on these sort of products.
Edited by LHaag 12/18/2022 21:49
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Pivot Bio ?
