I appreciate what farmers do (my mom's family farmed), and I do think the Ag community is working very hard to reduce their contribution; however, please don't try to minimize or point fingers. As of 2012 nearly all residential lawn fertilizer no longer contains phosphorous. In addition water samples show high phosphorous levels in the rivers upriver from any large cities; although, outdated sewer systems undoubtedly do contribute to the phosphorous as well.
Again, I do think that the Ag community has worked really hard to educate and reduce phosphorous runoff. I also know that farming is a business and no business wants to waste money putting more inputs into it's product. I just want to make sure that the problem isn't blurred where nothing gets solved. I saw an article in an Ag publication today doing just that. They were pointing the finger at residential residents and large city sewers.
John
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