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Humeston, IA | The concern I'd have is how to determine application rates based on Morgan P analysis. As the other poster mentioned this is used and developed for Northeast, not Iowa. Iowa State doesn't have recs for Morgan extract, so you'd be using the recs from your lab (International Ag Labs?).
Also, if you decided to take the results to another provider for recs they couldn't really help, as there aren't really any conversions from Morgan to more widely used extraction methods.
ISU has recs for Bray P1, Olsen, and Mehlich 3, both colorimetric and ICP. There are a number of labs in and around Iowa that can accommodate these extraction methods. | |
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Who knows about the Morgan Soil Test
