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Table 12 Incomplete hypothetical data in second lactations' cows. Estimates of changes in peak milk yield (kg).

From: What are Production Diseases, and How do We Manage Them?

 

Complete data

Partial dataa

 

Incidence or quartile

Milk changes

Incidence or quartile

Milk changes

Calving diseases

37.1

-2.2*

10.3

4.0*

Summer calvingsb

35.1

-2.8*

35.1

-2.3*

Low BCS at calvingc

3.00

0.7

3.00

-0.2

Short dry periodc

61.0

-3.0*

61.0

-3.9**

  1. *p < 0.05 **p < 0.01; aNot all cases of metritis are included; bCalving period April through August; cLowest quarter.