ORGANIC FARMING IN THE CORN BELT

被引:110
作者
LOCKERETZ, W [1 ]
SHEARER, G [1 ]
KOHL, DH [1 ]
机构
[1] WASHINGTON UNIV, CTR BIOL NAT SYST, DEPT BIOL, ST LOUIS, MO 63130 USA
关键词
D O I
10.1126/science.211.4482.540
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
引用
收藏
页码:540 / 547
页数:8
相关论文
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