Anonymous (2001) Nutrient Requirements of Domestic Animals. (7th ed.). Washington DC, NW, USA. p. 131-143.##
Arthington, J. D., Rechcigl J. E., Yost G. P., McDowell L.R., Fanning, M.D. (2002) Effect of ammonium sulfate fertilization on bahiagrass quality and copper metabolism in grazing beef cattle. J Anim Sci. 80: 2507-2512.##
Balik, J., Kulhanek, M., Cerny, J., Szakova, J., Pavlikova, D., Cermak, P. (2009) Differences in soil sulfur fractions due to limitation of atmospheric deposition. Plant Soil Environ. 55: 344-352. ##
Bremner, I., Humphries, W.R., Phillippo, M., Walker, M.J., Morrice, P.C. (1987) Iron-induced copper-deficiency in calves: dose-respobse relationships and interactions with molybdenum and sulfur. J Anim Sci. 45: 403-414.##
Farhad, A., Yawooz, M., Kettanah, A., Smail, S.Q. (2013) Environmental significance of major and trace elements in the soils of selected areas in Erbil City, Kurdistan Region, northern Iraq. Iraqi National J Earth Sci. 13: 15 -32. ##
Heidarpour Bami, M., Mohri, M., Seifi, H.A., Alavi Tabatabaee, A.A. (2008) Effects of parenteral supply of iron and copper on hematology, weight gain and health in neonatal dairy calves. Vet Res Commun. 32: 553-561.##
Ikem, A., Campbell, M., Nyirakabibi, I., Garth, J. (2008) Baseline concentrations of trace elements in residential soils from Southeastern Missouri. Environ Monit Assess. 140: 69-81.##
Kalra, Y. P., Maynard, D. G. (1998) Microwave digestion of plant tissue in an open vessel. In: Handbook of Reference Methods for Plant Analysis. (1st ed.). CRC Press. Washington DC, USA. p. 63-65. ##
Khawedim, KH. (2013) Study of distribution of some trace elements contents in the soil of Basra City using geographic information system (GIS). JUBPAS. 21: 497-509. ##
Lindsay, W. L. (1979) Chemical Equiliberia of Soils, (1st ed.). John Wiley and sons. New York, USA. p. 449.##
McDowell, L.R., (2002) Recent advances in minerals and vitamins on nutrition of lactating cows. Pakistan J Nutr. 1: 8-19.##
McDowell, L.R., Conrad, J.H., Ellis, G.L. (1984) Mineral deficiencies and imbalances, and their diagnosis. In: Symposium on Herbivore Nutrition in Sub-Tropics and Tropics-Problems and Prospects. Gilchrist, F.M.C., Mackie, R.I. (eds.). Craighall, South Africa. p. 67-88.##
Noaman, V. (2013) Assessment of some serum trace element in holstein dairy cattle on industrial farms of Isfahan province, Iran., World Appl Sci J. l 21: 1158-1161.##
Nolte, J. (2003) ICP Emission spectrometry: A practical guide (Paperback). (1st ed.). Wiley-VCH. Owingen, Germany. p. 2-8: 232-235.##
Pavlík, A., Skarpa, P., Slama, P., Havlicek, Z. (2013) Short communication: Iron concentrations in soil, pasture and blood plasma of beef cattle reared suckling cows system. JMBFS. 2: 1526-1530.
Plichta, W., Kuczynska, I. (1991) Metal contents in soils of Kaffioyra, Spitsbergen. Polish Polar. Res. 12: 183-193. ##
Radostists, O.M., Gay, C.C., Hinchcliff, K.W., Constable, P.D. (2007) Diseases associated with deficiencies of mineral nutriants. In: Veterinary Medicine. (10th ed.) W.B. Saunders, London, UK. p. 1707-1717, 1730-1732.##
Rasooli, A., Nouri, M., Razi Jalali, M., Sabbaghan, M. (2014) Seasonal evaluation of serum copper level of sheep and status of copper, molybdenum, sulfur and iron in soil and pastures in Yasuj town. J Large Anim Clin Sci Res. 7: 11-18.##
Ray Campbell, C. (2000) Reference Sufficiency Ranges for Plant Analysis in the Southern Region of the United States. (1st ed.). North Carolina, USA. p. 45-51.##
Seger, M. (2012) Levels of sulfur as an essential nutrient element in the soil-crop-food system in Austria. Agriculture. 2: 1-11.##
Smith, BP. (2015) Copper deficiency and toxicity in ruminants. In: Large Animal Internal Medicine. Smith, B.P. (ed.). (5th ed.). Elsevier Mosby. Missouri, USA. p. 935-945.##
Yavar, A., Sarmani, S.B., Hamzah, A., Hashim, J.H., Aljunid, S.M., Siong, K.K. (2014) Trace elements in the soil of Phumi Khleang village, Kandal Province, Cambodia. J Environ Poll Hum Health. 2: 63-68.##
Zhou, L., Long, R., Pu, X., Qi, J., Zhang, W. (2009) Studies of a naturally occurring sulfur-induced copper deficiency in Przewalski’s gazelles. Can Vet J. 50(12): 1269-72.##