Legacy Phosphorus and Harmful Algal Blooms in Lake Erie

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Legacy P… Does not predict PP or DRP trends Is not particularly high, as measured by STP Appears to be declining in last decade
Management changes… Broadcast fertilization without incorporation Fall application Soil P stratification Tile drainage efficiency increases Soil health issues?
Page 1 and 2: Legacy Phosphorus and Harmful Algal
Page 3 and 4: Background: NCWQR Monitoring Raisin
Page 5 and 6: Legacy P? Legacy pollutants: PCBs,
Page 7 and 8: II. Lake Erie Recent History
Page 9 and 10: “I heard Lake Erie is the place f
Page 11 and 12: What was wrong with Lake Erie? HABs
Page 13 and 14: Central Basin Oxygen Depletion Rate
Page 16 and 17: Shift in lake response WHY? Total P
Page 18 and 19: Forms of Phosphorus (Total) Dissolv
Page 20 and 21: Showing Success of BMPs for PP Log(
Page 22 and 23: Showing Success of BMPs for PP p
Page 24 and 25: Importance of DRP (Total) Dissolved
Page 26 and 27: Importance of DRP Dissolved P • 9
Page 28 and 29: Risk of Phosphorus Loss Source fact
Page 30 and 31: P concentration in soil 83% Fertili
Page 34 and 35: Verdict(?)… Changes in management
Page 36 and 37: Management Don’t make things wors
Page 38: Rock Creek 6/25/06 The End

Legacy Phosphorus and Harmful Algal Blooms in Lake Erie

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