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Nitrogen collection calculations: (TOTAL LBS PER DAY) <br /> Wet/Dry Nitrogen produced from cattle in freestalls with flushed concrete lanes: <br /> ANIMAL LBS (N) PER DAY DRY (COLLECTED @ WET (FLUSHED <br /> CLASSIFICATION CORRALS) FROM COW LANES) <br /> fill 20% 80% <br /> Lactating (milking) 1,490 298 1192 <br /> a <br /> Dry Cows 0 0 0 <br /> Bred Heifer 461 92 369 ` <br /> E Heifer 1 ear- bred 154 31 123 <br /> Calves (3 months — 1 221 44 177 <br />' ear <br /> Baby Calves (up to 3 44 9 35 <br /> months <br /> TOTAL NITROGEN <br /> COLLECTED PER <br /> DAY: 474 1,895 <br /> Dry Nitrogen produced from cattle in dry lots (scrape): <br /> V ANIMAL LBS (N) PER DAY DRY (COLLECTED <br /> CLASSIFICATION CORRALS) <br /> 10 W/o <br /> Lactating (milking) 0 0 <br /> Dry Cows 156 156 <br /> Bred Heifer 0 0 <br /> Heifer 1 ear- bred 0 0 <br /> Calves (3 months — 1 0 0 <br /> ear <br /> Baby Calves (up to 3 0 0 <br />' months <br /> TOTAL NITROGEN 156 <br /> COLLECTED PER <br /> DAY: <br /> eNitrogen flushed from concrete cow lanes will flow into settling ponds. <br /> ®Settling ponds typically collect 80% of the solids prior to reaching the lagoon. <br /> eSettling ponds retain approximately 20% of the nitrogen prior to reaching the lagoon. <br /> See Page 47 for References and Bibliography <br /> OO Western Dairy Design Associates,Inc.2003 <br /> II, Page 28 <br />