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Farm Math Formulae
| Question | Answer |
|---|---|
| Percent Calf Crop | calves weaned/cows exposed x 100 |
| Pregnancy Rate (% Pregnant) | cows pregnant/cows exposed x 100 |
| Calving Interval | Interval 1 (in days) + interval 2 (in days)/ number of intervals |
| Average Daily Gain | Final Weight - Initial Weight/# of days between weights = Gain per day |
| Adjusted Weaning Weight | actual weaning weight - birth weight/ age in days x 205 + birth weight |
| Yearling Weight | final weight - actual weaning weight/# days since weighing x 160 + 205 day adj. weaning weight |
| Dressing Percentage | hot carcass weight/live slaughter weight x 100 |
| Shrinkage | hot carcass weight - chilled carcass weight/hot carcass weight x 100 |
| additive factor for 2 yr old dam | 60lb Male, 54lb Female |
| additive factor for 3 yr old dam | 40lb male, 36lb female |
| additive factor for 4 yr old dam | 20lb male, 18lb female |
| additive factor for 5-10 yr old dam | 0 |
| additive factor for older than 11 yr old dam | 20lb male, 18 lb female |
| carcass value | live value of animal per 100lb/ dressing percent = $ value of carcass per 100lb |