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Iowa State University s fertilizer recommendations flawed, Farm Bureau says

Iowa State University s fertilizer recommendations flawed, Farm Bureau says
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Floyd riverUnited statesUniversity of iowaAntonio mallarinoRick robinsonKevin mccallAndrew wheelerCarrie laboskiUniversity of wisconsinIowa nutrient researchIowa farm bureauEducation councilFarm bureau conservationIowa state university professor emeritus john sawyerMaximum returnCorn nitrogen rate calculator