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RT @JEnvironQual: Total #Phosphorus Concentration Trends in 40 Iowa Rivers, 1999-2013 @IowaGeoSurvey https://t.co/O1Q7gGGW6t https://t.co/f…
RT @JEnvironQual: Total #Phosphorus Concentration Trends in 40 Iowa Rivers, 1999-2013 @IowaGeoSurvey https://t.co/O1Q7gGGW6t https://t.co/f…
Total #Phosphorus Concentration Trends in 40 Iowa Rivers, 1999-2013 @IowaGeoSurvey https://t.co/O1Q7gGGW6t https://t.co/ftmklFJfXC
Phosphorus concentrations in Iowa rivers have declined 2.6% per year from 1999 to 2013. https://t.co/HwJWCOrGtz