HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Wilbue, J. W. Articles by Hauge, S. M. Search for Related Content PubMed Articles by Wilbue, J. W. Articles by Hauge, S. M.

The vitamin A requirements of dairy cows for the production of butterfat of high vitamin A value. I. Artificially dried alfalfa hay (carotene)¹

Departments of Dairy Husbandry and Agricultural Chemistry, Purdue University Agricultural Experimental Station, Lafayette, Indiana

ABSTRACT

1. Two feeding experiments have been completed to determine the minimum vitamin A requirements of dairy cows for the production of butter with maximum vitamin A value.
   
2. Artificially dried alfalfa hay was used as the source of vitamin A (carotene).
   
3. Under the conditions of these experiments, it was found that dairy cows required approximately 550,000 vitamin A units daily to restore the vitamin A potency of the milk fat to its highest value.
   

¹ Published with the approval of the Director of the Purdue University Agricultural Experiment Station.