The availability of niacin in corn, soybean meal and wheat middlings for the hen.
D000821:Animal Feed; D000818:Animals; D002645:Chickens; D009539:Nicotinic Acids / Q000032:analysis*; D013025:Glycine max / Q000032:analysis*; D014908:Triticum / Q000032:analysis*; D003313:Zea mays / Q000032:analysis*
D009539:Nicotinic Acids