@conference {40579,
	title = {Effect of breed on plasma carotene concentration in New Zealand dairy heifers},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {54},
	year = {1994},
	month = {Jan},
	pages = {119-120},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	abstract = {Factors affecting plasma carotene concentration were investigated in New  
Zealand dairy heifers.  Blood samples were collected from 4000 dairy heifers in  
spring in November 1992.  Significant (P<0.001) variation was found in  
plasma carotene concentrations due to region, breed and farm.  Values for  
individual cows ranged from 1.7 to 56.2 ug/ml.  Purebred Jersey heifers had the  
highest plasma carotene levels (18.2 {\textpm} 0.4 ug/ml), purebred Friesians the  
lowest (14.4 {\textpm} 0.2 ug/ml), crossbreds were intermediate with 50\% Jersey and  
50\% Friesian significantly different from the purebreds (16.9 {\textpm} 0.6 and 15.4 {\textpm}  
0.4 ug/ml respectively). },
	issn = {1176-5283},
	author = {Newman S-AN and Knight TW and O{\textquoteright}Neill KT and Death AF and Ridland M}
}
