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× crop production
作者:James M. MacDonald, Penni Korb , Robert Hoppe , James M. MacDonald, Penni Korb , and Robert Hoppe
发布日期:2013
关键词:cropland consolidation;crop production;...
发布机构:United States Department of Agriculture
2 Agricultural Productivity and Efficiency in Russia and Ukraine: Building on a Decade of Reform [科技报告]
作者:Stefan Osborne andMichael Trueblood
发布日期:2002
关键词:Russia;Ukraine;...
发布机构:United States Department of Agriculture
作者:Roy Darwin , Marinos Tsigas , Jan Lewandrowski , and Anton Raneses
发布日期:1995
关键词:Climate change;world agriculture;...
发布机构:United States Department of Agriculture
作者:Edwin Young andLinda Scott Kantor
发布日期:1999
关键词:Food;food consumption;...
发布机构:United States Department of Agriculture