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' M�.nure and Pasture Management for Recreational Horse Owners Page 3 of 5 <br /> oxygen-carrying capacity of blood (methemoglobinemia). Nitrate consumption <br /> has also been linked to cancer. In light of this health risk, the Minnesota <br /> Pollution Control Agency (MPCA) explicitly prohibits the overapplication of <br /> nitrogen on pastures and other field crops. <br /> Horse manure also contains phosphorus. When phosphorus enters takes, rivers, <br /> and other surface waters, it stimulates the growth of algae, aquatic plants, and <br /> other vegetation. One pound of phosphorus can produce up to 500 pounds of <br /> aquatic plants. When these plants decay, they reduce oxygen to levels where <br /> many fish species cannot survive. Generally, phosphorus moves into surface <br /> waters when manure applied or stored on the soil surface is moved laterally, <br /> usually by rainstorms, into a drainage flow system toward the water. Even <br /> manure that has been worked into the soil can be a concern if the soil erodes <br /> into the water body throughout the year. Currently, no Minnesota law limits the <br /> amount of phosphorus that can be applied to cropland or pastures. <br /> Feedlot Permits <br /> „-�--..�--_.:��---�--��� ; <br /> 5' �� <br /> � � i , .t, ` '� ��' . <br /> #LR i. <br /> — _ a <br /> .� _ : <br /> t 'j <br /> � <br /> ' @ <br /> 3 <br /> i <br /> � <br /> Recreational horse owners need to <br /> know how to properly rr9anage manure <br /> and breeding. <br /> Minnesota's feedlot program, created in 1971, helps protect the state's waters <br /> from improperly managed manure. The MPCA, which administers the program, <br /> defines a feedlot as "any animal confinement area where a vegetative cover <br /> cannot be maintained, including poultry ranges, zoos, and race tracks and fur <br /> farms." Many recreational horse owners do not need to apply for a feedlot <br /> http://www.extension.umn.edu/distribution/naturalresources/components/7540_02.htm1 1/17/2013 <br />