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!:amass Balance of Nitrogen Loading _ <br /> Nitrate loading calculations for properties: <br /> Definition:.Au is the abbreviation for animal unit.One animal unit represents 1000 Ibs.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 Ibs. <br /> Bred Heifers .45 lbs. <br /> Heifers .45 lbs. <br /> Calves .45 tbs. <br /> Baby calves 45 lbs. <br /> i <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 1900 1.4 2660 <br /> Dry cows 309 1.12 346 <br /> Bred Heifers 1004 1.02 1024 <br /> Heifers(1 yr.-breeding) 935 1,02 341 <br /> Calves 1004 0.49 492 <br /> Baby calves 335 0.29 97 <br /> "Nitrogen Production <br /> Flushed Freestalls <br /> Type of Animal A.U.'s Ib of Nlday Nlday <br /> .Lactating cows 2,660 0.56 1,490 <br /> Dry cows 0 0.45 0 <br /> Bred Heifers 1,024 0.45 461 <br /> FHeifers(1 yr.-breeding) 341 0.45 154 <br /> Calves 492 0.45 221 <br /> Baby calves 97 0.45 44 <br /> Clushed <br /> otal Ibs.N per day before losses 2,369 <br /> Feed Fane <br /> Lact21ing cows 0 -.61 0.56 0 <br /> rY cows a�� r 0.45 0 <br /> Bred Heifers x � 4 <br /> Heifers(1 yr.-breeding) 0.45 0 <br /> 0.45 0 <br /> Calves 'b 0.45 <br /> Baby cages :, ?p4 p.45 0 <br /> F.IrItal Ibs.N per day before losses 0 <br /> Scraped Corral <br /> actating caws ' <br /> 0.5$ 0 <br /> Dry cows1 �3hfif 0.45 156 <br /> 3red Heifers `_a..-. .Ol 0.45 p <br /> Heifers(1yr.-breeding) <br /> `�; p 0.45 0 <br /> Calves x0 0.45 0 <br /> Baby calves ',q t3 0.45 p <br /> Total lbs.N per day before losses 156 <br /> { <br /> I <br /> c <br /> f <br /> I <br />