Tianjin Provincial Standard of the People's Republic of China
Latest
DB12/T 754-2017
Scope
This standard applies to the site construction and feeding management of free-range laying hens on hillsides, woodlands, orchards, pastures and other areas with a breeding scale of more than 5,000 birds.
DB12/T 754-2017 history
2017DB12/T 754-2017 Free-range laying hen site construction and feeding management specifications