46. The Effect of Nine-, Twelve- and Fifteen-Hour Intervals during the Day and the Night on Milk Production

Abstract

The work herein reported has shown that more milk and fat were produced per hour during 9-, 12- and 15-hour night intervals than during intervals of the same length during the day. The milk increment was, however, greater than the fat increment. With midday and midnight milking hours more milk and fat were produced per hour from midnight to midday than from midday to midnight. In this case the fat increment was the greater.