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期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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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

Institution:	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
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