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Any time a field has a Phosphorus Fertility Index Value (FIV) of 150 or greater, a study needs to be completed to determine the feasibility of additional applications of phosphorus.
University of Illinois researchers challenge many of the tenets of soil fertility, especially practices related to the use of potassium (K) fertilizer.
The Ohio Phosphorus Task Force II issued its final report on findings to support reduction of phosphorus loading and associated harmful algal blooms in Lake Erie and surrounding watersheds.
Fertilizer practices in the fall (11/20/13)
Fall fertilization for the 2014 crop (10/30/13)
Iowa fertilizer management standards updated (10/23/13)
When is a biosolid the right source? (10/16/13)
Additional P&K Links