A report on surveys of the incidence of mastitis infection in New Zealand dairy herds

1966 ◽  
Vol 14 (5-6) ◽  
pp. 62-70 ◽  
Author(s):  
E.O. Brookbanks
Keyword(s):  
New Zealand ◽  
Dairy Herds

Relationship between central performance test for growth in Hereford bulls and growth and carcass traits of progeny

1984 ◽  
Vol 39 (3) ◽  
pp. 371-382 ◽  
Author(s):  
R. L. Baker ◽  
B. W. Wickham ◽  
C. A. Morris
Keyword(s):  
New Zealand ◽  
Environmental Effects ◽  
Performance Test ◽  
Carcass Traits ◽  
Live Weight ◽  
Dairy Herds ◽  
Performance Tests ◽  
Critical Factors ◽  
Low Performance ◽  
Almost All

ABSTRACTFour central performance tests of growth in Hereford bulls from about 10 to 19 months of age on pasture were conducted in New Zealand. From the 100 bulls performance tested 63 were representatively sampled, including bulls with high and low performance test rankings, and progeny tested in dairy herds. Crossbred progeny were purchased from the dairy herds at 3 to 4 months of age, assembled in one location and reared together on pasture for 14 to 15 months prior to slaughter. Regressions of progeny growth and carcass traits on a number of different performance traits for growth of their sires were in almost all cases not statistically significant. The effective heritability, from offspring-sire regression, was 0·07 (s.e. 0·05) for final live weight and 009 (s.e. 0·06) for post weaning gain from about 200 to 550 days of age. It is concluded that central performance tests, as presently conducted in New Zealand, are of limited value for ranking breeding values of bulls for growth. Possible reasons for these results are discussed. It is suggested that pre-test environmental effects and age at the start of the central test are critical factors.

A note on effectiveness of dry cow therapy in New Zealand dairy herds

1982 ◽  
Vol 30 (4) ◽  
pp. 50-52 ◽  
Author(s):  
J.W. Pankey ◽  
R.M. Barker ◽  
A. Twomey ◽  
G. Duirs
Keyword(s):  
New Zealand ◽  
Dairy Herds ◽  
Dry Cow Therapy

Selective and deferred treatment of clinical mastitis in seven New Zealand dairy herds

2020 ◽  
Vol 176 ◽  
pp. 104915 ◽  
Author(s):  
Andrew Bates ◽  
Richard Laven ◽  
Olaf Bork ◽  
Merlyn Hay ◽  
Jess McDowell ◽  
...  
Keyword(s):  
New Zealand ◽  
Clinical Mastitis ◽  
Dairy Herds ◽  
Deferred Treatment

The Extended Use Of The Milk Recording System In New Zealand

1946 ◽  
Vol 1946 (02) ◽  
pp. 20-25
Author(s):  
Arthur Ward
Keyword(s):  
New Zealand ◽  
Dairy Farms ◽  
Farm Management ◽  
Recording System ◽  
Soil Types ◽  
Dairy Herds ◽  
List Type ◽  
Young Stock ◽  
Improvement Plan ◽  
On Farm

In New Zealand, herd recording, since the introduction of the Herd Improvement Plan in 1938, has been governed in policy by the Herd Recording Council in Wellington. In 1938 the decision was taken to extend the scope of the milk recording movement so that milk records could be used for:— (1) improvement through breeding; (2) studies on farm management, including the prevention of disease in dairy herds; and (3) studies on problems of nutrition on dairy farms, em-bracing not only the feeding of dairy cattle and young stock, but also such matters as the influence of soil types, pasture species, etc. There are six Herd Improvement Associations and a representative of each Association is elected annually to the Herd Recording Council with full voting power.

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