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Mass Balance of Nitrogen Loading: <br /> Nitrate loading calculations for existing properties: <br /> Considering the soil type involved, denitification of nitrate nitrogen to the gaseous form as nitrous oxide <br /> or nitrogen gas will likely occur. <br /> Nitrogen content of manure from dairy cattle: <br /> Classification of cow: Lbs. N per Au <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 for typical Holstein dairy cattle: <br /> Lactating cow 1.4 Au's <br /> Dry cow/breed heifer 1.2 Au's <br /> Heifer(1 yr.- bred) 1.1 Au's <br /> Calves(3 mo.- 1 yr.) .5 Au's <br /> Baby calves .25 Au's <br /> Acres available for distribution of agricultural wastes: <br /> Properties Owned: <br /> APN# Total Acres Farmed Acres <br /> 229-12-34 78.26 52.3 <br /> 229-12-32 9.79 6 <br /> 229-12-33 9.79 9 <br /> 229-12-18 39.63 38 <br /> 229-12-16 19.97 19 <br /> - Properties Rented: <br /> 229-13-03 85 <br /> 229-12-30 21.45 19 <br /> Total farmed acres: 228.3 <br /> Nitrogen production calculations for the Da Silva Dairy: <br /> Projected animal units after planned expansion: <br /> Classification of animal: #Animals Au's per Total A's <br /> Lactating cows: 800 x 1.4 1,120 <br /> Dry cows and bred heifers 560 x 1.2 672 <br /> Heifers(1 yr.-breeding) 120 x 1.1 <br /> 132 <br /> Calves 360 x .5 180 <br /> Baby calves 120 x .25 30 <br /> Total animal units 2,134 <br /> Nitrogen production from: <br /> Classification of animal: #Au's Lbs N/Au Lbs N per day <br /> Lactating cows 1,120 x .56 627.2 <br /> Dry cows and bred heifers 672 x .45 302.4 <br /> Heifers(1 yr.-breeding) 132 x .40 <br /> 52.8 <br /> Calves 180 x .40 72.0 <br /> Baby calves 30 x .40 12.0 <br /> Total lbs. N per day before losses 1,066.4 <br /> 9 <br />