Arkansas - Agricultural Communication Services - University of ...

Arkansas Animal Science Department Report 2001
Table 2. 2000 Arkansas DHIA Averages for Official Holstein Herds.
Production traits Quartile 1 1 Quartile 2 Quartile 3 Quartile 4
Number of herds 9 10 10 10
Number of cows/herd 118 142 95 70
Rolling herd average milk, lb 20,858 17,388 14,354 11,364
Rolling herd average fat, lb 715 584 499 412
Rolling herd average protein, lb 647 533 447 347
Average days in milk 182 187 185 186
Average test day milk (milking cows) 66.4 56.2 48.8 40.0
Average percentage of cows in milk 86.6 85.4 81.7 76.6
Average standardized 150 day milk 71.0 61.7 52.5 43.9
1 st Lact 2 peak milk 1 st , lb 74.4 62.9 53.7 50.4
2 nd Lact peak milk 2 nd , lb 89.3 76.4 66.4 53.0
3+ Lact peak milk 3rd, lb 93.4 82.0 72.3 63.7
All lact peak milk average, lb 87.0 73.8 66.7 57.0
SCC 3 average (x 1000) 436 551 576 522
1 st Lact % cows SCC 0 - 3 4 79 65 63 63
2 nd Lact % cows SCC 0 - 3 70 62 65 64
3+ Lact % cows SCC 0 - 3 59 38 48 42
All lact % cows SCC 0 - 3 68 55 57 54
Income minus feed cost, $ 1,739 1,205 1,078 768
1 Quartile 1 = top 1 - 25 percentile herds; Quartile 2 = top 26 - 50 percentile herds; Quartile 3 = bottom 26 - 50 percentile herds;
and Quartile 4 = bottom 1 - 25 percentile herds.
2 Lact = Lactation
3 SCC = somatic cell counts
4 SCC 0-3 = somatic cell counts of less than 142,000.
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