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Nitrogen collection calculations: Dry: Wet: Cattle in freestalls and flushed concrete lanes: Collected @ Corrals Flushed from Cow Lanes 20% 80% Lactating cows @ 1,254 lbs. N/Day 251 lbs 1004 lbs Dry cows @ 0 lbs. N/Day 0 lbs 0 lbs Bred heifers @ 0 lbs. N/Day 0 lbs 0 lbs Calves-3 mos. to 1 yr. @ 0 lbs. N/Day 0 lbs 0 lbs Baby calves @ 0 lbs. N/Day 0 lbs 0 lbs Total Nitrogen collected per day: 251 Ibs per day,Dry 1,004 Ibs per day,Wet Dry: Wet: Cattle in corrals and flushed feed lanes: Collected @ Corrals Flushed from Cow Lanes 40% 60% Lactating cows @ 0 lbs. N/Day 0 lbs 0 lbs Dry cows @ 597 lbs. N/Day 239 Ibs 358 lbs Bred heifers @ 140 Ibs. N/Day 56 Ibs 84 Ibs Calves-3 mos.to 1 yr. @ 190 lbs. N/Day 76 lbs 114 lbs Baby calves @ 127 lbs. N/Day 51 lbs 76 lbs Total Nitrogen collected per day: 422 Ibs per day,Dry 632 Ibs per day,Wet Nitrogen flushed from concrete cow lanes will flow through settling ponds. Settling ponds typically collect 80%of the solids prior to reaching the lagoon. Settling ponds retain approximately 20%of the nitrogen prior to reaching the lagoon. Lbs of flushed nitrogen collected in settling pond 20°x6 x 1,636 327 Ibs- per day Lbs of nitrogen reaching anaerobic lagoon 80% x 1,636 1,309 Ibs. per day Yearly nitrogen production: Total nitrogen in solids per year from corrals: 672 x 365 245,441 Ib/N/Year Total nitrogen in solids per year in aerobic settling pond: 327 x365 119,418 Ib/N/Year Total nitrogen in liquids at anaerobic lagoon: 1,309 x365 477,671 Ib/N/Year Nitrogen retention(losses)calculations from storage: Nitrogen retained from storage in dry lot corrals: 55-70% Use 55% Nitrogen retained from storage in aerobic settling pond: 35-45% Use 40% Nitrogen retained from storage in anaerobic lagoons: 20-35% Use 25°x6 Lbs of nitrogen per year available after losses in storage: Solids: N in solids from corrals: 245,441 x .55 134,992.33 Ib/N/Year N in solids from aerobic setting pond: 119,418 x .40 47,767 Ib/N/Year Total nitrogen in solids after losses: 182,759 Ib/N/Year Liquids: N in liquids from anaerobic lagoon after losses: 477,671 x .25 119,418 Ib/N/Year Total nitrogen after losses available to crops from both solids and liquids: 302,177 Ib/N/Year Nitrogen requirements by the acres of farmed properties during the summer season and winter season all taking solids and liquids: Crop Acres N Requirement Com silage(35T) 248 290 Ibs. of nitrogen per crop 72,010 Ibs. N Wheat silage- 248 175 Ibs.of nitrogen per crop: 43,454 Ibs. N o Almond 48.9 200 Ibs. of nitrogen per crop: 9,778 lbs. N a Alfalfa 100 480 Ibs. of nitrogen per crop: 48,000 Ibs. N u Nitrogen required at these fields 173,242 Ibs. N U O v 0 Q W