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Iowa Phosphorus (P) Index Calculator update
February 13, 2025
DES MOINES, Iowa, Feb. 13 -- The Iowa Department of Natural Resources issued the following news release:

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Iowa Phosphorus (P) Index Calculator update

DES MOINES -- Manure management planners should note that the Iowa NRCS updated the Iowa Phosphorus (P) Index calculator in April of 2024.

This updated calculator must be used for any P Index updates to application fields contained in a manure management plan (MMP), and can be downloaded fro . . .

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