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IA/MN/WI | Across the midwestern university data, Iowa, Illinois, South Dakota, Madison, and U of M, the statistical correlation between P value and yield is 0.4... for reference, 0.1 is considered a "trend", and 0.05 or smaller is considered statistically relevant. So as Easy stated, there is very little evidence that Phos levels on a soil sample are indicative of yield. This definitely changes based on soil type, but not because some soils just need more fert, it's because their soil composition has greater capacity to cycle Phos in season.
Look into a running a few samples to Next Level lab in SD, Jason is f-ing brilliant when it comes to soil chemistry and they will tell you exactly what you can do to improve the functionality of your ground and what is the yield limiter. | |
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Phosphorus level to yield
