title: Growth and reproductive performance of bulls and heifers fed purified and natural diets. IV. Semen characteristics, body measurements and fertility of bulls (22 to 156 weeks of age).
mesh_terms: D000367:Age Factors; D000704:Analysis of Variance; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001699:Biometry; D001827:Body Height; D001830:Body Surface Area; D001835:Body Weight; D002417:Cattle / Q000254:growth & development / Q000502:physiology*; D004044:Dietary Proteins; D005260:Female; D005298:Fertility; D008297:Male; D009584:Nitrogen / Q000494:pharmacology; D012611:Scrotum; D012661:Semen / Q000032:analysis*; D013025:Glycine max; D013737:Testis; D014508:Urea / Q000494:pharmacology
chemical_list: D004044:Dietary Proteins; D014508:Urea; D009584:Nitrogen