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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 /> Lactatin milkin 20% 80% <br /> 753 151 602 <br /> D Cows 0 0 <br /> Bred Heifer 233 0 <br /> 0 <br /> Heifer 1 ear- bred 47 186 <br /> Calves (3 months — 1 112 0 022 <br /> ear 89 <br /> Baby Calves (up to 3 22 4 <br /> months 18 <br /> _ TOTAL NITROGEN <br /> COLLECTED PER <br /> DAY: 224 895 <br /> Dry Nitrogen produced from cattle in dry lots (scrape): <br /> ANIMAL LBS (N) PER DAY DRY (COLLECTED @ <br /> CLASSIFICATION CORRALS) <br /> Lactatin milkin 100% <br /> 0 0 <br /> D Cows 79 79 <br /> Bred Heifer 0 0 <br />— Heifer 1 ear- bred 78 78 <br /> Calves (3 months — 1 0 0 <br /> ear <br /> Baby Calves (up to 3 0 0 <br /> months <br /> TOTAL NITROGEN <br /> COLLECTED PER <br /> DAY: 157 <br /> *Nitrogen 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 /> *Settling ponds retain approximately 20% of the nitrogen prior to reaching the lagoon. <br /> See Page 47 for References and Bibliography <br /> ©Western Dairy Design Associates,inc.2003 <br /> Page 7 <br />