RESEARCH REPORT HOW EGGS ARE SORTED
After the egg has been laid in the laying house, it rolls down to a conveyer belt and washed and dried. Next it is taken to a candling room and s placed over a large lamp. After being candled the eggs are taken to a room where the eggs are weighed and sorted according to size and are graded by the scale AA, A, or B. Then the eggs are taken to a room where the are placed in cardboard boxes and are ready to sell.
Mass is found when an object is compared to a known weight. Although weight changes around the world, mass does not change.
Circumference is the distance around, at the widest point, on a circular object. Circumference is found when the diameter in multiplied by 3.14. Or taking a tape measure and wrap it around, at the widest point.
TYPES OF CHICKENS
Here is just a brief list of the types of chickens. There are 44 standard breeds and 225 varieties of large chickens, and 23 breeds and 107 varieties of small chickens called bantams. There are 4 classes of chickens, American, Asiatic, English, and Mediterranean.
Class Breed Egg Color Hen weight (in lbs.)
American Buckeye brown 6.5
Chantecler brown 6.5
Delaware brown 6.5
Dominique brown 5
Holland white 6.5
Java brown 7.5
Lamona white 6.5
Hampshire brown 6.5
Rock brown 7.5
Red brown 6.5
White brown 6.5
Wayndotte brown 6.5
Asiatic Brahma brown 9
Cochin brown 8.5
Langshan brown 7.5
English Australorp tinted 6.5
Cornish brown 8
Dorking white 6.5
Orpington brown 8
Redcap white 6
Sussex brown 7
Ancona white 4.5
Adulusian white 5.5
Buttercop white 5
Catalanas white 6
Leghorn white 4.5
Minorca white 7
Spanish white 6.5
The egg’s shell is made up of shell itself, then the outer spongy layer, then inner mamnillary layer. The shell is very porous, it lets water and gasses pass through. After that there are the shell membranes. The membranes are the outer shell membrane, and the inner shell membrane. The white is layered like these, thin, thick, thin, thick layers of white. The last layer of thick white, called the chalaza, is twisted around the yolk. The yolk is contained in a vitenine membrane called the yolk sac. The yolk is lighter than the white.
ECONOMIC IMPORTANCE OF CHICKENS
Chickens and poultry provide plenty of protein in both the meat and eggs. The top 5 leading egg producing states are; 1.California, 2. Indiana, 3. Pennsylvania, 4. Ohio, and in 5. Georgia. In California every year 7,444,000,000 eggs are laid and sold in markets.
CLASSES OF CHICKENS
There are 4 classes of chickens, that are raised for there meat and eggs, American, Asiatic, Mediterranean, and English. Some breeds have several varieties. Chickens may differ greatly in body type, plumage pattern, head decoration, and other physical features. American breeds are called dual-purpose breeds because they are suited for both meat and egg production.
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Adams, Albert W. "Poultry", Compton’s Interactive Encyclopedia, 1996
"Chicken", World Book Encyclopedia, 1995
Davis, Karen PhD, "The Plight of Poultry", available at http://arns.enirolink.org/upe/s96 primer.html, 1996, The site listed cannot be reached, sorry.
"Egg", World Book Encyclopedia, 1995
"Poultry", Compton’s Interactive Encyclopedia, 1995
University Animal care, "Species Information", available at http://ww.ahsc.arizona.edu/uac/iacuc/poultry/species.shtml The site listed cannot be reached, sorry.
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