Examination of the impact of range,cage-free,modified systems,and conventional cage environments on the labor inputs committed to bird care for three brown egg layer strains |
| |
Affiliation: | 1. Piedmont Research Station, North Carolina Department of Agriculture and Consumer Services, Salisbury 28147, USA;2. Prestage Department of Poultry Science, North Carolina State University, Raleigh 27695, USA |
| |
Abstract: | |
| |
Keywords: | labor cage cage-free free-range economic cost |
本文献已被 ScienceDirect 等数据库收录! |
|