Tradeoffs between production and perennial vegetation in dairy farming systems vary among counties in the northeastern U.S.
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- 作者：J. Franklin Egan ; Franklin.Egan@ars.usda.gov" class="auth_mail" title="E-mail the corresponding author ; Aimee Hafla ; Sarah Goslee
- 关键词：Dairy farms ; Grazing ; Perennial forages ; Phosphorus ; Regional food systems
- 刊名：Agricultural Systems
- 出版年：2015
- 出版时间：October 2015
- 年：2015
- 卷：139
- 期：Complete
- 页码：17-28
- 全文大小：1589 K
文摘
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Dairy systems show a persistent tradeoff between production and perennial vegetation.
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The severity of the tradeoff is highly dependent on local crop yields and soils.
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Grain imports lead to substantial phosphorus surpluses at the county scale.
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Milk production per area was more responsive to forage yields than milk per cow.