Researches into sterility of cows in South Africa : the Influence of (i) dry rations, (ii) lack of exercise, and (iii) lack of sunlight on reproduction in beef heifers and cows

Abstract

The effects of a dry ration, high condition, the absence of sunlight, and exercise upon the sexual activity and reproduction of beef females have been studied. The results obtained during six years of observations are reported upon; the period includes four calvings.