Egg production in the United States has undergone a remarkable transformation. Before the twentieth century, hens ran loose around the farmyard, largely fending for themselves. Around the late 1800s, farm flocks came into being, and egg production became a serious part of the farm enterprise. Hens were given their own housing and provided with feeders, waterers, roosts, and nests, as well as a fenced-in yard. The farm-flock system allowed for the application of important management principles,... więcej

Salem Press Encyclopedia of Science, 2022. 3p.