title: Dietary calcium, DDT source and age of hen on the reproductive performance of caged White Leghorns fed DDT.
mesh_terms: D000284:Administration, Oral; D000367:Age Factors; D000821:Animal Feed; D000818:Animals; D001835:Body Weight; D002136:Calcium, Dietary / Q000008:administration & dosage; D002645:Chickens / Q000502:physiology*; D003634:DDT / Q000008:administration & dosage; D004531:Eggs; D005260:Female; D005298:Fertility; D006799:Housing, Animal; D007536:Isomerism; D012098:Reproduction; D013997:Time Factors
chemical_list: D002136:Calcium, Dietary; D003634:DDT