Legacy Phosphorus and Harmful Algal Blooms in Lake Erie

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Risk of Phosphorus Loss Source factors l l Legacy P pool Timimg and Placement of new P Transport factors l l Landscape position BMPs and
Soil test trends in P, NW Ohio Long term phosphorus soil test trends for NW Ohio 120 lbs/ac Bray P1 100 80 60 40 20 OSU Lab Logan OSU Lab Calhoun DRP FWMC A&L Lab 0 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005
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 30 and 31: P concentration in soil 83% Fertili
Page 32 and 33: Legacy P… Does not predict PP or
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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