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Have your agronomic questions answered by a Farm Journal agronomist. E-mail us directly at TestPlots@FarmJournal.com, and we’ll respond on this blog to provide an interactive dialogue.

What Is the Correct Phosphorus-Zinc Ratio?

Jul 21, 2011

Question: What is the correct phosphorus - zinc ratio?

Answer:  We commonly use a ratio of 20 to 1 in central Illinois. Rules of thumb are risky to rely on, though.  I’d encourage you to have some tissue analysis done to determine what ratio your particular soils and crops need.
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