. Care of hatching eggs before incubation. Eggs; Eggs; Oeufs; Oeufs; Oeufs. Although some of the evidence is circumstantial, low levels of carbon dioxide and oxygen appear desirable for hatching eggs. Use of plastic enclosures flushed with nitrogen gas thus provides the best conditions for extended storage, such as is needed for primary breeders. Orientation and positional change Traditionally, hatching eggs have been packed and held before incubation in the small-end-down position. This packing orientation was thought to help main- tain the air space in its original position and provide the h
. Care of hatching eggs before incubation. Eggs; Eggs; Oeufs; Oeufs; Oeufs. Although some of the evidence is circumstantial, low levels of carbon dioxide and oxygen appear desirable for hatching eggs. Use of plastic enclosures flushed with nitrogen gas thus provides the best conditions for extended storage, such as is needed for primary breeders. Orientation and positional change Traditionally, hatching eggs have been packed and held before incubation in the small-end-down position. This packing orientation was thought to help main- tain the air space in its original position and provide the highest rate of survival of embryos. However, it has been shown that chicken eggs packed with the small end up have better hatchability if they are held upright and not turned even for storage periods as long as 4 weeks. Daily turning is beneficial when eggs are packed in the usual small-end-down position and stored for more than 2 weeks, but not when eggs are packed small end up and stored up to 4 weeks. Fig. 5 shows eggs held in each position, and Fig. 6 illustrates eggs stored in inverted cases so that they are held small end up. According to the limited evidence available, when eggs are shipped the small-end-down orientation is preferable because of the chances of rough handling during Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Proudfoot, F. G. , 1921-; Hamilton, R. M. G; Canada. Agriculture Canada. Ottawa : Agriculture Canada
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Keywords: ., bookcentury1900, bookcollection, bookleafnumber8, booksubjecteggs
