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-Mass Balarlco of Nitrogen Loading _ <br /> r"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 frori'rlairy cattle: <br /> C12ssiflcation.of_cow::._. ._.. _ Lbs. N per Au <br /> actating cows _. <br /> Ory cows` _56 lbs. <br /> 3rdd Heifers 451bs: <br /> Heifers .45 lbs. <br /> Calves .45 Ibs. <br /> Baby calves .45 Ibs. <br /> .45 lbs. <br /> Animal units for typical Holstein dairy cattle,generally accepted by the State Water Quality Control Board: <br /> Lactating cow <br /> ry:cows 1.4 Au'9 <br /> Bred Heifers 1.12 Au's <br /> Heifer(1 yr.-bred) 1-02 Au's <br /> Calves(3 mo.-1 yr.) 1.02 Au's _ <br /> abq calves A9 Au's <br /> .29 Au's <br /> (Nitrogen Production Calculations <br /> Projected animal units: Animals A.U.'s each XU.'s <br /> cfating cows <br /> Dry cows 1665 1.4 2331 <br /> Bred Heifers 271 i.12 304 <br /> Heifers(1 yr.-breeding) 880 1.02 897 + <br /> Calves 293 1.02 299 <br /> Paby.calves 880 0.49 431 <br /> 293 0.29 $5 <br /> Nitrogen Production <br /> tushed Freestalis <br /> Type of Animal A.U.'s Ib of Nlda N/da <br /> Lactating.cows 0.56 <br /> Dry cows y <br /> 2,331 1,305 rredlHefers 0 0 45 p <br /> 897• 0 45 <br /> Hei0s(1 yr.-breeding) 404' <br /> 299 <br /> alves 0;45 135 <br /> Baby'calves4311 0.45. 9,94 <br /> 85. 0.45 38 <br /> r-r—Total <br /> lbs.N per day before losses 2,076 <br /> 'i. <br /> Flushed Feed Lane <br /> Lactating cows <br /> ry caws rr 0.56 p <br /> Fe Heifers!! 0� t 0.45 0 <br /> Heifer's(1 yr;breeding) <br /> Calves0�. 0.45 0 <br /> x i b . <br /> aby calves "�`' � 0.45 <br /> 0.45 0 <br /> Total lbs.N per day before iosses <br /> 0 <br /> Scraped Corral <br /> rLactafing cows 0.56 0 <br /> Dry cows <br /> 0.45 135 <br /> Bred Heifers <br /> Heifers'(1 yr.-breeding) 0.45 00.45 0 <br /> alve"' <br /> Baby calves 0.45 0 <br /> 0.45 0 <br /> Total lbs.N per day before losses 135 <br /> r'r <br /> Y ' <br /> J <br /> 1 <br /> f <br />