- 已选条件:
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× conservation programs
作者:Dwight Gadsby , Daniel Hellerstein;Jeffrey Hopkins , Paul Johnston , Mitch Morehart , Mark Smith , Roger Claassen;LeRoy Hansen;等
发布日期:2001
关键词:conservation programs;environmental policy;...
发布机构:United States Department of Agriculture
作者:Edwin Young
发布日期:2008
关键词:Farm act;farm bill;...
发布机构:United States Department of Agriculture
作者:Keith Wiebe andNoel Gollehon
发布日期:2006
关键词:AREI;agricultural economics;...
发布机构:United States Department of Agriculture
作者:Robert Johansson
发布日期:2006
关键词:conservation programs;conservation program design;...
发布机构:United States Department of Agriculture
作者:Marc Ribaudo , Michael Livingston , and James Williamson
发布日期:2012
关键词:Corn;nitrogen;...
发布机构:United States Department of Agriculture
作者:Cynthia Nickerson, Marc Ribaudo , and Nathaniel Higgins
发布日期:2010
关键词:Working lands;conservation programs;...
发布机构:United States Department of Agriculture