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![](/profile/get-photo.asp?memberid=966&type=profile&rnd=980) Coldwater, Michigan | First I would be real surprised if the 8-24-4 is 100% ortho. The 9-18-9 probably is 100% ortho. Neither one of the products is going to influence your soil test levels of P & K a whole lot. There isn't enough in the applied amounts to matter as far as the soil tests are concerned. Use which ever one works the best for you as far as convenience, performance. Helena's with a pint to a pint and a half of Zinc would probably be your best.
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