What is candling in agriculture

Table 1. To evaluate the interior quality of eggs without breaking them open, the eggs are candled. Candling takes place in a darkened room and involves shining a light through the egg. To candle an egg, hold the small end of the egg between your thumb and first two fingers. Place the large end up to the candling light in a slanting position see Figure 1.

You can see the air cell and the yolk shadow within the albumen. For any 4-H poultry judging contest, the air cell will always be at the large end of the egg. While holding the egg between your thumb and first two fingers, turn your wrist back and forth Figure 1. This will cause the contents of the egg to twirl. The movement of the contents can tell you a great deal about the yolk and albumen.

Figure 1. Poultry Biosecurity. Related Products. Explore by Category. Know Your Rodents Life Cycle. Disinfection Done Right. April 1. March 2. February 1. December 1. November 1. October 1. July 1. June 1. October 7. September 6. August 4. July 8. June 5. May 5. April 6. March 8. February 8. January 4. December 2. October 5. September 1. August 5. July 4. May 1. January 2. Compare Products. Remove This Item Compare.

Clear All. My Wish List. Last Added Items. Add to Cart Add to Cart. Disaster Resource Center. An official website of the United States government. Have a Question?

What is candling? Information Knowledge Article. Candling is the process of using light to help determine the quality of an egg. Automated mass-scanning equipment is used by most egg packers to detect eggs with cracked shells and interior defects. During candling, eggs travel along a conveyor belt and pass over mechanical sensors integrated with computerized systems for segregation of defective eggs. Manual scanning techniques involve conveying the eggs over a light source where the defects become visible and the defective eggs are segregated.