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Mass Balance of Nitrogen Loading` -� <br /> Additional Properties, Faria Dairy <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 /> Bulls .45 lbs. <br /> Lactating cows . 56 lbs. <br /> Dry cows& Bred heifer .45 lbs. <br /> —Heifers .40 lbs. <br /> Calves 40 lbs. <br /> Baby calves .40 lbs. <br /> —Animal units fortypical Holstein dairy cattle, generally accepted by the State Water Quality Control Board: <br /> s' 2.0 Au's <br /> -tating cane 1.4 Au's <br /> ry co4breed heifer 1.2 Au's <br /> —Heifer F1 yr.-bred) 1.1 Au's <br /> Calves(3 mo.-1 yr.) .5 Au's <br /> Baby calves .25 Au's <br /> Nitrogen Production Calculations <br /> Projected animal units: Animals A.U.'s each A.U.'s <br /> Bulls 40 2 80 <br /> Lactating cows 0 1.4 0 <br /> Dry cows and bred heifers 300 1.2 360 <br /> Heifers(1 yr.-breeding) 0 1.1 0 <br /> Calves 0 0.5 0 <br /> Baby calves 0 0.25 0 <br /> Nitrogen Production <br /> Flushed Freestalls <br /> Type of Animal A.U.'s Ib of N/day N/day <br /> Bulls 0 0.45 0 <br /> Lactating cows 0 0.56 0 <br /> Dry cows and bred heifers 360 0.45 162 <br /> Heifers(1 yr.-breeding) 0 0.45 0 <br /> Calves 0 0.45 0 <br /> Baby calves 0 0.45 0 <br /> Total lbs. N per day before losses 162 <br /> Flushed Feed Lane <br /> Bulls 80 0.45 36 <br /> Lactating cows 0 0.56 0 <br /> Dry cows and bred heifers 0 0.45 0 <br /> Heifers(1 yr.-breeding) 0 0.45 0 <br /> Calves 0 0.45 0 <br /> Baby calves 0 0.45 0 <br /> Total lbs. N per day before losses 36 <br /> _ Appendix IA <br /> Mass Balance of Nitrogen Loading-Additional Properties <br />