Why are the professional manuals less enthusiastic about promoting slow release fertilizer as compared to the FYN homeowner manual?
Slow release is more forgiving of error in application, but also more expensive. To an individual, this increased cost is minor, but to a large company it can mean tens of thousands of dollars. By law, BMPs must be economically and technically feasible. The lb-N/1000ft2 limit on quick release application in the BMP ensures that large amounts are not applied at one time, which might pose a serious leaching or runoff hazard. There are times when a shot of quick release is just the thing, such as recovering from pest damage or wear injury. In general, the quick vs. slow release decision is left to the professional judgment of the trained applicator. DEP underwrites and strongly promotes the BMP training program to help professionals make the best possible decisions.
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