Review of Production, Husbandry and Sustainability of Free-range Pig Production Systems
作者： Z. H. Miao , P. C. Glatz , Y. J. Ru
关键词:
摘要: … Frequent rotation is required although most farmers are keeping their pigs for a longer … to mud wallows, essential in the summer to help the sows keep cool. A week before farrowing they …
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