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机译:Seed yield of soybeans with daytime or continuous elevation of carbon dioxide under field conditions.
Crop Systems and Global Change Laboratory, B-001 USDA, Beltsville Agricultural Research Center, 10300 Baltimore Ave., Beltsville, MD 20705-2350, USA.;
canopy; carbon dioxide; crop yield; leaves; photosynthesis; precipitation; rain; seeds; soyabeans; stems; vapour pressure;