Energy level effects on growth and conception rates of heifers.
D000821:Animal Feed; D000818:Animals; D001835:Body Weight; D002417:Cattle / Q000254:growth & development / Q000378:metabolism / Q000502:physiology*; D004734:Energy Metabolism; D004971:Estrus; D005260:Female; D005306:Fertilization; D011247:Pregnancy; D012820:Silage; D003313:Zea mays