Table 1. Dairy cow enrollment in DHI as of January 1, 2022, by test plan

Plan code Plan tag Herds Cows Percentage of DHI cows
00 DHI 208 100,984 2.5
02 DHI-APCS 616 961,673 24.1
20 DHIR 196 44,002 1.1
21 DHIR-AP-T 4 692 0.0
22 DHIR-APCS 217 170,226 4.3
23 DHIR-AP 1,584 342,504 8.6
31 DHI-AP 4,786 1,887,138 47.3
33 DHI-MO 11 14,910 0.4
34 DHI-MO-AP 9 7,050 0.2
40 DHI-OS 318 30,968 0.8
41 DHI-OS-AP 2,282 196,005 4.9
42 DHI-OS-APCS 183 34,944 0.9
43 DHI-OS-MO 18 7,489 0.2
44 DHI-OS-MO-AP 6 879 0.0
46 DHI-OS-AP-AC 1 2,839 0.1
70 DHI-SS 11 7,209 0.2
71 DHI-SS-AP 380 122,539 3.1
72 DHI-SS-APCS 48 48,218 1.2
73 DHI-SS-MO 3 4,316 0.1
74 DHI-SS-MO-AP 6 4,206 0.1
  All Plans 10,887 3,988,791 100.0 

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