Performance decrease: (1) Permanent reduction caused by genetic factors, inbreeding, or age; (2) Temporary reduction caused by deteriorated environmental conditions or other stress.
Category of multiplication flocks whose mission is the second crossing of lines ...
Individuals of the dam and sire lines with tested performance and combining abil...
A unit equal to one billionth (10⁻⁹) of the whole.
A unit equal to one millionth of the whole (0.001%).
The highest egg production achieved by a hen or flock during the laying period.
Hatcher tray or box with partitions/holes that prevents uncontrolled movement of...