The purpose of present study was to determine the variations  in the levels of Selenium, Zinc, Iron, Copper, Molybdenum and Manganese in the serum of Kurdi sheep  and to compare the age difference in the levels of minerals between lambs and rams that are supplemented with Selenium and Zinc individually or their combination.It was on two experiences.The males of the Kurdi sheep from lambs and rams for four coefficients each as follows; First Treatment: (control) without adding, Second Treatment: added Selenium with a dose of 0.5 mg /kg fed,Third Treatment: added Zinc with a dose of 100 mg /kg fed, Fourth Treatment: added Selenium with Zinc with a dose of 0.5 + 100 mg/kg fed, then they were given gelatinous capsules daily for 60 days.Selenium and Zinc supplementation and their combination led to significant increase in the Selenium and Zinc concentration in the blood serum of lambs and Rams. Selenium, Zinc and their combinationsignificantly contributed to changes in the analysed minerals (Selenium, Zinc, Iron, Copper Molybdenum and Manganese).

Cow and sheep manure contains beneficial nutrients nitrogen (N) carbohydrates (CHO) and Organic matter (OM), and is therefore used as an organic fertilizer. However, the excessive use of manure can cause environmental problems and negatively affect human and animal health because these materials also contain large amounts of heavy metals, especially selenium (Se), nickel(Ni), cobalt(Co), tin(Sn), lead(Pb), and cadmium(Cd) To assess the potential risks due to increased concentrations of heavy metals in sheep and cow manure.The compost was collected from three different regions in Kirkuk, Diyala and Sulaymaniyah governorates in Iraq and Kurdistan Region where the results showed The content of cow and sheep manure of organic matter (OM), carbohydrates (CHO) and nitrogen (N) levels were normal, which are beneficial nutrients for soil and plants and used as organic fertilizer. The level of selenium, nickel and cobalt was higher in cow manure compared to sheep manure in all governorates. The level of lead and cadmiumwas higher in sheep manure in Diyala governorates compared to cow manure.