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From February to December 1998 in Estonia, 29 AI Holstein bulls were used to study the effects of age, origin and season on sperm concentration on the incidence of morphological abnormalities, sperm motility and intactness of plasma membrane in fresh semen. The highest percentage of sperm...

Padrik, P.; Jaakma, Ü.; Müürsepp, I.
Agraarteadus, 2000, 11, 1, pp 71-80