[email protected]. 58%ANIMAL PRODUCTION SYSTEM BEEF ASSIGNMENT: RD23420This assignment is my own work, presented in my own words, ALL sources of information have been cited and any direct quotes are in quotation marks.Production from an autumn herd of Limousin x Friesian cows mated to Charolais bulls .TRAIT BIRTH WEIGHT JUNE WEIGHT Average-D-Gain Sire 1 Female 38 239.2 0.85TRAIT BIRTH WEIGHT JUNE WEIGHT Average-D-Gain Sire 1 Female 38 239.2 0.85TRAIT BIRTH WEIGHT JUNE WEIGHT Average-D -Gain Sire 1 Male 39 255.8 0.98 BIRTH TRAIT WEIGHT JUNE-D-Gain Sire 1 Male 39 255.8 0.98 Bulls 2 Male 4 3 219.7 0.77Father 3 Male 38 362.2 1.29Climate change and time. Heredity and breed genetics can be carried within the genes which can lead to sterility, but some are genetically sterile. The birth weight was better and the June weight, but the average daily gain was not good due to the harsh conditions faced during the winter, due to dry matter feeding, wind, cold and lack of natural minerals, as well as stress and cold water. Age, climate, metritis and poor management can also lead to infertility. If produced, genetic mutations can be part of infertility, as well as embryo abnormality. All of these lethal factors can cause infertility in Holstein-Friesian cows. Body weight determines puberty and poor nutrition causes irregular cycles in cows and reduces ovulation, pregnancy toxemia and weakness in offspring. The physical size of the cow can influence the ability to mate and carry the fetus during the birth of offspring. Cows are polyestrous animals, their calves are born at that time, giving them the best chance of survival. High summer temperatures are one of the main causes of the formation of poor-quality sperm in bulls and reduce sexual activities, as well as... .in the center of the article ......tosis and lactic acidosis are caused from poor management of cow nutrition.=1500ReferencesABS Global. (2012). List of dairy bulls. ABS.Allen, D., & Kilkenny, B. (1990). Planned production and marketing of beef. Granada Publishing.Blowey, R.W. (1990). A veterinary book for the dairy farmer (third ed.). Old Pont Publishing Ltd. British Charolais Cattle Company. (2012). Charolais. Retrieved December 10, 2013, from the British Charolais Cattle Society: http://www.charolais.co.uk/Craplet, C. (1963). The dairy cow. Eldora: Edward Arnold Publishing.DISKIN, M. G. (1999). British Society of Animal Sciences. Volume 2 (number 26).Diskin, M. G. (201). Fertility in the high-producing dairy cow (Vol. Volume 2). BSAS.M Dufrasne, I. M. (2013). Journal of Animal Science. Animal Genetics, Volume 91(12).S, L.A., & John, F. (2011). Improved grassland management (new ed.). Crowood Press.