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Yearly nitrogen production: Total nitrogen in solids per year from corrals: (DRY COLUMN X 365) 248.56 x 365 = 90,724.40 lbs. N per year Total nitrogen in solids per year in aerobic settling pond: 167.65 x 365 = 61,192.25 lbs. N per year Total nitrogen in liquids at anaerobic lagoon: 670.59 x 365 = 244,765.35 lbs. N per year Nitrogen retention (losses) calculations from storage: Nitrogen retained from storage in dry lot corrals: 55-70% Use 60% Nitrogen retained from storage in aerobic settling pond: 35-45% Use 40% Nitrogen retained from storage in anaerobic lagoons: 20-35% Use 25% Pounds (lbs) of nitrogen (N) per year available after losses in storage: N in solids from corrals: 90,724.40 x .55 = 49,898.42 lbs. N in solids from aerobic setting pond: 61,192.25 x .40 = 24,476.90 lbs. Total nitrogen in solids: 74,375.32 lbs. Liquids: N in liquids from anaerobic lagoon 244,765.35 x .25 = 61, 191.34 lbs. Total nitrogen before losses available to crops from both solids and liquids: 135,566.66 lbs. Nitrogen requirements by 174.35 acres of farmed properties during the summer season and 174.35 acres during the winter season: Rotating crops at 174.35 summer / 174.35 winter acres, all taking solids and liquids: Corn silage (35T)-290 lbs. of nitrogen per crop: x 174.35 acres = 50,562 lbs. N Wheat silage- 175 lbs. of nitrogen per crop: x 174.35 acres = 30,511 lbs. N Nitrogen required at these fields: 81,073 lbs. N Nitrogen balance: Nitrogen required at fields: 81,073 lbs. N Nitrogen from liquids: 61,191 lbs. N Nitrogen shortage from liquids: 19,882 lbs. N Refer to page 24 for Endnotes and Reference Sources Nitrate Loading Study Property Name and Address: Frank Faria Dairy,Inc. 12182 S. Robinson Road, Escalon,CA 95320 Page 17 Western Design/David Avila 2001 Mass Balance of Nitrogen Loading IXE