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AIN Nitrogen collection calculations: aY Wet: Cattle in freestalls and flushed concrete lanes: Collected @ Corrals Flushed from Cow Lanes 20% 80% Lactating cows @ 753 Its N/Day 151 Its 602 Its Dry cows @ 0 lbs. N/Day 0 Its 0 IDs Bred heifers @ 233 Its. N/Day 47 lbs 186 lbs Calves- 1 yr to bred @ 0 Its N/Day 0 Itis 0 His Calves-3 mos. to 1 yr @ 112 Its, N/Day 22 Its 89 lbs Baby calves @ 22 lbs N/Day 4 lbs 18 His Total Nitrogen colleded per day y 224 1 s par day b,y 895 lbs vac day ory Wet. Cattle in corrals and flushed Nedfertile: Dry Collected 0 Corrals Flushed from Cow Lanes 40% 60% Lactating cows @ 0 lbs N/Day 0 Its 0 ms Dry cows @ 0 Itis.NIDay 0 its 0 lbs Bred heifers @ 0 IDs, N/Day 0 Itis 0 lbs Calves- 1 yr to bred @ 0 lbs NIDay 0 Its 0 lbs Calves-3 mos.to 1 yr.@ 0 His N/Day 0 Itis . 0 lbs Baby Alves @0 lbs.N/Day 0 Ibs 0 Its Total Nitrogen collected per day. - lbs Day _ ,ns�r day.ay Dry Wet: Cattle In corrals(Scraped); Collected @ Corrals 100% Lactating cows @ 0 IDs N/Day 0 lbs Dry cows @ 79 Its N/Day 79 Its Bred herfers @ 0 Ibs. N/Day 0 His Calves- 1 yr.to bred Q 78 lbs N/Day 78 Its Calves-3 mos.to 1 yr @ 0 Its N/Day 0 lbs Baby calves @ 0 Its. N/Day 0 Ibs Total Nitrogen collected per day: 156 ms oar day ory — 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 Lbs of nitrogen reaching anaerobic lagoon 20% x 895 179 lbs.per day 80% x 895 716 ft.per day Yearly nitrogen production: Total nitrogen in solids per year from corrals. 380 x 365 138.776 Ib/WYear Total nitrogen in solids per year in aerobic settling poral: 179 x365 65.366 Ib/N/Year Total nitrogen in liquids at anaerobic lagoon 716 x365 261.464 tb/N/Year Nitrogen retention(losses)calculations from storage. Nitrogen retained from storage in dry lot corrals. 25-70% Use 25% Nitrogen retained from storage in aerobic settling pond. 3545% Use 40% Nitrogen retained from storage in anaerobic lagoons- 20-35% Use 25% Lbs of nitrogen per year available after losses in storage Solids. N in solids from corrals: 138.776 x 25 34.694.12 Ib/N/Year N in solids from aerobic setting pond 65.366 x 40 26.146 Ib/N/Year Total nitrogen in solids after losses 60.841 b/N/Year Liquids N in liquids from anaerobic lagoon after losses. 261.464 x 25 65.366 b/N/Year Total nitrogen after losses available to crops from both solids and liquids 126.207 Ib/N/Year Nitrogen requirements by the acres of fanned properties during the summer season and winter season all taking solids and liquids: Crop Acres N Requirement Com silage(35T) 615 250 Ibs,of nitrogen per crop 153,643 Ibs,N Wheat silage- 615 175 His,of nitrogen per crop. 107,550 Its.N Alfalfa- 0 480 Ibsof nitrogen per crop: - His,N Nitrogen required at these fields 261.192 Its.N