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rMass nafarnce of Nitrogen Loading <br /> Nitrate loading calculations for properties: <br /> Definition:Au is the abbreviation for animal unit.One animal unit represents 1000 lbs.of body weight. <br /> Nitrogen content of manure from dairy cattle: <br /> Classification of cow: Lbs.N per Au <br /> Lactating cows .56 lbs. <br /> Dry cows 45 lbs. <br /> Bred Heifers 45 lbs. <br /> Heifers .45 lbs, <br /> Calves .45 Ibs. <br /> Baby calves 45 lbs. <br /> Animal units for typical Holstein dairy cattle,generally accepted by the State Water Quality Control Board: <br /> Lactating cow 1.4 Au's <br /> Dry cows 1.12 Au's <br /> Bred Heifers 1.02 Au's <br /> .Heifer(1 yr.-bred) 1.02 Au's <br /> Calves(3 mo.-1 yr,) .49 Au's <br /> Baby calves .29 Au's <br /> Nitrogen Production Calculations <br /> Projected animal units: Animals A.U.'s each A.U.'s <br /> Lactating cows 1665 1.4 2331 <br /> Dry cows 271 1.12 304 <br /> Bred Heifers 880 1.02 897 <br /> Heifers(1 yr,breeding) 293 1.02 299 <br /> Calves 880 4.49 431 <br /> Baby calves 293 0.29 85 <br /> I <br /> F Nitrogen Production <br /> Fh,shed Freestalls <br /> Type of Animal A.U.'s Ib of Nlday Nlday <br /> Lactating cows 2,331 0.56 1,305 <br /> Dry cows 0 0.45 0 <br /> Bred Heifers 897 0.45 404 <br /> Heifers(1 yr.-breeding) 299 0.45 135 <br /> Calves 431 0.45 194 <br /> Baby calves 85 0.45 38 <br /> otal lbs.N per day before lasses 2,076 <br /> Flushed Feed Lane <br /> 5 a <br /> Lactating cows 0 <br /> rryr <br /> ow0.45 0 <br /> red ifersr00.45 0 <br /> eifers(1 yr.-breeding) ' d0 0.45 0 <br /> Calves { 0' 0.45 0 <br /> i <br /> Baby calves 'NL Di 0.45 0 <br /> Total lbs.N per day before losses 0 i <br /> RR i <br /> Scraped Corral <br /> actating cows 0.56 0 <br /> Cry cows 0.45 135 <br /> Bred Heifers A (j 0,45 0 <br /> Heifers{1 yr.-breeding) d 0.45 0 i <br /> Calves fl 0,45 0 i <br /> 9aby calves ' R' 0.45 0 <br /> Total lbs.N per day before losses 135 <br /> �t ! <br /> i <br /> i <br /> i <br /> i <br />