august 2008 animal agriculture as science the science of animal agriculture
TRANSCRIPT
August 2008
Animal Agriculture as Science
The Science of Animal Agriculture
August 2008
Land Grant and other events• 1862- President Lincoln established the United
States Department of Agriculture.
• 1872- Hatch Act establishment of experiment stations.
• 1962- Morrill Act provided public land and funds for establishing universities to teach practical methods of manufacturing and producing food and fiber.
August 2008
Land Grant Con’t
• 1914 Smith-Lever Act set up cooperative extension service.
• 1917 Smith-Hughes Act established Vocational Agriculture in public high schools.
August 2008
The Scientific Method requires several steps
• Recognize a problem
• Develop hypothesis
• design an experiment
• collect data
• analyze data
• draw conclusions
• make recommendations
August 2008
Benefits of Research in Animal Science
• Food increase amount
• Relatively low prices for food
August 2008
Advancements made in Agriculture since 1925• Beef cattle live weight marketed per
breeding female increased from 220 pounds to 482 pounds.
• Sheep live weight marketed per breeding female increased from 60 to 130 pounds.
• Milk marketed per dairy cow increased from 4189 to 10500 pounds. An increased of 2 1/2 times the amount of milk as in 1925.
August 2008
Some More Advances Made
• Swine live weight marketed per breeding female increased from 160 to 285 pounds. Time to produce a 220 pound hog has been reduced from 170-157 days.
• The weight of marketed turkeys increased from 13.0 to 18.4 pounds.
• Broilers can reach market weight at 7 ½ weeks, down from 15 weeks. Amount of food needed to reach market weight was cut from 4 pounds to 2 pounds.
August 2008
Some more advances made
• Production per laying hen from increased from 112 to 232 eggs.
August 2008
Revolutionized Animal Agriculture
• Animal Immunization
• Refrigeration
• Artificial Insemination
• Embro Transfer
• Use of Computers
August 2008
Ways Livestock Research has Helped Humans
• Cortisone- relieves the suffering of arthritis made from the gallbladder of cattle
• Insulin- use for diabetics derived from hogs
• Heart Valves- pig heart valves are superior to mechanical valves because they do not accumulate as much residue.