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2nd annual Beltsville Sustainable Agriculture Symposium : long-term cropping systems experiments : an evaluation of their contribution to sustainable agriculture : progress report and future direction : sustainable agriculture research programs at the Beltsville Agricultural Research Center, Agricultural Research Service, United States Department of Agriculture, Wednesday, March 11, 1998, 9:00 a.m., auditorium, Building 003, BARC-W, Beltsville, Maryland.
- Other Authors:
- Beltsville Sustainable Agriculture Symposium and United States. Agricultural Research Service.
- Sustainable agriculture Research Congresses
Cropping systems Research Congresses
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