300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
For a more detailed description of this table, click here.
Glycine max (L.) Merr. [Soybean]
| 300 ppm | 600 ppm | 900 ppm | |
| Number of Results | 290 | 29 | 7 | 
| Arithmetic Mean | 47.9% | 70.7% | 80.9% | 
| Standard Error | 2.2% | 7.1 | 8.9% | 
| Experimental Conditions | 300 ppm | 600 ppm | 900 ppm | |
| Ackerson et al. (1984) | field, open-top chambers |  | 
 | 38% | 
| Allen et al. (1988) | soil bins, growth chambers | 38% | 62% |  | 
| Allen et al. (1991) | soil bins, growth chambers | 58% | 61% |  | 
| Amthor et al. (1994) | open-top chambers, seed | 41% | 
 |  | 
| Amthor et al. (1994) | open-top chambers, whole plant | 36% | 
 |  | 
| Baker et al. (1989) | soil bins, growth chambers, day/night 26/19°C | 41% | 
 |  | 
| Baker et al. (1989) | soil bins, growth chambers, day/night 31/24°C | 22% | 
 |  | 
| Baker et al. (1989) | soil bins, growth chambers, day/night 36/29°C | 14% | 
 |  | 
| Bencke-Malato et al. (2019) | Leaf biomass after 24 days of plants grown hydroponically in controlled environment chambers; cv Embrapa 48 | 37% | 
 |  | 
| Bencke-Malato et al. (2019) | Stem biomass after 24 days of plants grown hydroponically in controlled environment chambers; cv Embrapa 48 | 46% | 
 |  | 
| Bencke-Malato et al. (2019) | Root biomass after 24 days of plants grown hydroponically in controlled environment chambers; cv Embrapa 48 | 28% | 
 |  | 
| Bencke-Malato et al. (2019) | Total biomass after 24 days of plants grown hydroponically in controlled environment chambers; cv Embrapa 48 | 38% | 
 |  | 
| Bernacchi et al. (2007) | Seed yield biomass of plants grown from seed to maturity under standard field conditions for four complete growing seasons at the SoyFACE facility in central Illinois (USA) at a high (385 mm/season) total evapotranspiration (ET) | 38% | 
 |  | 
| Bernacchi et al. (2007) | Seed yield biomass of plants grown from seed to maturity under standard field conditions for four complete growing seasons at the SoyFACE facility in central Illinois (USA) at a modest (285 mm/season) total evapotranspiration (ET) | 76% | 
 |  | 
| Booker et al. (1997) | open-top chambers, 54-62 DAP, charcoal-filtered air | 38% | 
 |  | 
| Booker et al. (1997) | open-top chambers, 54-62 DAP, 1.5 times ambient O3 | 50% | 
 |  | 
| Booker et al. (1997) | open-top chambers, 75-83 DAP, charcoal-filtered air | 36% | 
 |  | 
| Booker et al. (1997) | open-top chambers, 75-83 DAP, 1.5 times ambient O3 | 66% | 
 |  | 
| Booker et al. (1997) | open-top chambers, 97-106 DAP, charcoal-filtered air | 28% | 
 |  | 
| Booker et al. (1997) | open-top chambers, 97-106 DAP, 1.5 times ambient O3 | 94% | 
 |  | 
| Booker et al. (2005a) | Seed biomass of well watered and fertilized plants, exposed to low (24 nmol O3/mol air) ozone concentrations, grown from seed sown in the ground in open-top chambers in 1999 | 38% | 
 |  | 
| Booker et al. (2005a) | Seed biomass of well watered and fertilized plants, exposed to high (75 nmol O3/mol air) ozone concentrations, grown from seed sown in the ground in open-top chambers in 1999 | 45% | 
 |  | 
| Booker et al. (2005a) | Seed biomass of well watered and fertilized plants, exposed to low (24 nmol O3/mol air) ozone concentrations, grown from seed sown in large pots (15-L) in open-top chambers in 1999 | 10% | 
 |  | 
| Booker et al. (2005a) | Seed biomass of well watered and fertilized plants, exposed to high (75 nmol O3/mol air) ozone concentrations, grown from seed sown in large pots (15-L) in open-top chambers in 1999 | 51% | 
 |  | 
| Booker et al. (2005a) | Seed biomass of well watered and fertilized plants, exposed to low (24 nmol O3/mol air) ozone concentrations, grown from seed sown in the ground in open-top chambers in 2000 | 19% | 
 |  | 
| Booker et al. (2005a) | Seed biomass of well watered and fertilized plants, exposed to high (75 nmol O3/mol air) ozone concentrations, grown from seed sown in the ground in open-top chambers in 2000 | 68% | 
 |  | 
| Booker et al. (2005a) | Seed biomass of well watered and fertilized plants, exposed to low (24 nmol O3/mol air) ozone concentrations, grown from seed sown in large pots (21-L) in open-top chambers in 2000 | 22% | 
 |  | 
| Booker et al. (2005a) | Seed biomass of well watered and fertilized plants, exposed to high (75 nmol O3/mol air) ozone concentrations, grown from seed sown in large pots (21-L) in open-top chambers in 2000 | 86% | 
 |  | 
| Booker et al. (2005b) | Total plant residue biomass of plants grown in open-top field chambers | 31% | 
 |  | 
| Booker et al. (2005b) | Total plant residue biomass of plants grown in open-top field chambers with 1.5 times ambient O3 | 16% | 
 |  | 
| Booker and Fiscus (2005) | Well watered and fertilized plants grown from seed to maturity out-of-doors in pots in open-top chambers at ambient ozone | 22% | 
 |  | 
| Booker and Fiscus (2005) | Well watered and fertilized plants grown from seed to maturity out-of-doors in pots in open-top chambers in the presence of 1.5 x ambient ozone | 51% | 
 |  | 
| Bunce (1995) | controlled environment chamber | 16% | 
 |  | 
| Bunce (2005a) | Leaf dry mass per unit area of plants grown in the field in open top chambers | 20% | 
 |  | 
| Bunce (2005b) | Seed yield biomass of well fertilized plants exposed to normal precipitation while being grown from seed to maturity out-of-doors in open-top chambers continually flushed with ambient-CO2 air or with enriched-CO2 air for 14 hours per day (day only enrichment) for a total of four growing seasons | 29% | 
 |  | 
| Bunce (2005b) | Seed yield biomass of well fertilized plants exposed to normal precipitation while being grown from seed to maturity out-of-doors in open-top chambers continually flushed with ambient-CO2 air or with enriched-CO2 air for 24 hours per day (day + night enrichment) for a total of four growing seasons | 52% | 
 |  | 
| Bunce (2014) | Seed yield of soybean (cultivar Clark) of non-irrigated and non-fertilized plants grown from seed in a field of the Beltsville Agricultural Research Center, Beltsville, Maryland, USA, with daylight-only atmospheric CO2 | 55% | 
 |  | 
| Bunce (2014) | Seed yield of soybean (cultivar Clark) of non-irrigated and non-fertilized plants grown from seed in a field of the Beltsville Agricultural Research Center, Beltsville, Maryland, USA, with 24-hour atmospheric CO2 | 73% | 
 |  | 
| Bunce (2014) | Seed yield of soybean (cultivar Spencer) of non-irrigated and non-fertilized plants grown from seed in a field of the Beltsville Agricultural Research Center, Beltsville, Maryland, USA, with daylight-only atmospheric CO2 | 47% | 
 |  | 
| Bunce (2014) | Seed yield of soybean (cultivar Spencer) of non-irrigated and non-fertilized plants grown from seed in a field of the Beltsville Agricultural Research Center, Beltsville, Maryland, USA, with 24-hour atmospheric CO2 | 67% | 
 |  | 
| Bunce (2016) | Seed yield at maturity of well-fertilized plants grown in open top chambers and harvested in 2013; cv Spencer | 105% | 
 |  | 
| Bunce (2016) | Seed yield at maturity of well-fertilized plants grown in open top chambers and harvested in 2014; cv Spencer | 74% | 
 |  | 
| Bunce (2016) | Seed yield at maturity of well-fertilized plants grown in open top chambers and harvested in 2014; cv Holt | 45% | 
 |  | 
| Bunce (2016) | Seed yield at maturity of well-fertilized plants grown in a FACE system and harvested in 2013; cv Spencer | 56% | 
 |  | 
| Bunce (2016) | Seed yield at maturity of well-fertilized plants grown in a FACE system and harvested in 2014; cv Spencer | 36% | 
 |  | 
| Bunce (2016) | Seed yield at maturity of well-fertilized plants grown in a FACE system and harvested in 2014; cv Holt | 29% | 
 |  | 
| Bunce and Nasyrov (2012) | Stem biomass of seedlings grown to the two-leaf stage in 20-cm-diamerter pots - filled to a depth of 21 cm with a soil mixture containing a fertile silt loam soil, peat moss, and perlite in the ratio of 3:1:1 by volume - within controlled environment chambers under control (C) conditions | 41% | 
 |  | 
| Bunce and Nasyrov (2012) | Stem biomass of seedlings grown to the two-leaf stage in 20-cm-diamerter pots - filled to a depth of 21 cm with a soil mixture containing a fertile silt loam soil, peat moss, and perlite in the ratio of 3:1:1 by volume - within controlled environment chambers under water-stressed (WS) conditions | 27% | 
 |  | 
| Campbell et al. (1988) | soil bins, growth chambers | 41% | 
 |  | 
| Castillo et al. (1989) | soil bins, growth chambers | 36% | 39% |  | 
| Cure et al. (1988a) | pots (8 liter) high nitrogen | 40% | 
 |  | 
| Cure et al. (1988a) | pots (8 liter), low nitrogen | 38% | 
 |  | 
| Cure et al. (1988b) | pots (8 liter), low phosphorus | 24% | 
 |  | 
| Cure et al. (1988b) | pots (8 liter), high phosphorus | 51% | 
 |  | 
| Cure et al. (1989) | pots (8 liter) | 60% | 
 |  | 
| Deepak and Agrawal (2001) | open-top chamber, cv. PK 472 | 38% | 
 |  | 
| Deepak and Agrawal (2001) | open-top chamber, cv. PK 472, SO2 stressed | 115% | 
 |  | 
| Deepak and Agrawal (2001) | open-top chamber, cv. Bragg | 49% | 
 |  | 
| Deepak and Agrawal (2001) | open-top chamber, cv. Bragg, SO2 stressed | 92% | 
 |  | 
| Delucia et al. (1985) | pots (1 liter) | 66% | 106% |  | 
| Dermody et al. (2008) | Three seasons of soybean yields produced at the SoyFACE facility in Illinois, USA | 25% | 
 |  | 
| Drag et al. (2020) | Total plant biomass after five weeks CO2 exposure in controlled environment greenhouse chambers; cv Pioneer 93B15 |  | 102% |  | 
| Drag et al. (2020) | Total plant biomass after five weeks CO2 exposure in controlled environment greenhouse chambers; cv Pioneer 93B15 |  | 90% |  | 
| Drag et al. (2020) | Total plant biomass after five weeks CO2 exposure in controlled environment greenhouse chambers; cv Pioneer 93B15 |  | 
 | 110% | 
| Drag et al. (2020) | Total plant biomass after five weeks CO2 exposure in controlled environment greenhouse chambers; cv Pioneer 93B15 |  | 
 | 78% | 
| Drag et al. (2020) | Total plant biomass after five weeks CO2 exposure in controlled environment greenhouse chambers; cv Pioneer 93B15 |  | 
 | 105% | 
| Drag et al. (2020) | Total plant biomass after five weeks CO2 exposure in controlled environment greenhouse chambers; cv Pioneer 93B15 |  | 
 | 90% | 
| Ferris et al. (1999) | glasshouse | 36% | 
 |  | 
| Fiscus et al. (1997) | open-top chambers, 1993, ambient ozone, seed yield | 4% | 
 |  | 
| Fiscus et al. (1997) | open-top chambers, 1993, ambient ozone, total biomass | 43% | 
 |  | 
| Fiscus et al. (1997) | open-top chambers, 1993, 1.5 x ambient ozone, seed yield | 68% | 
 |  | 
| Fiscus et al. (1997) | open-top chambers, 1993, 1.5 x ambient ozone, total biomass | 67% | 
 |  | 
| Fiscus et al. (1997) | open-top chambers, 1994, ambient ozone, seed yield | 2% | 
 |  | 
| Fiscus et al. (1997) | open-top chambers, 1994, ambient ozone, total biomass | 35% | 
 |  | 
| Fiscus et al. (1997) | open-top chambers, 1994, 1.5 x ambient ozone, seed yield | 52% | 
 |  | 
| Fiscus et al. (1997) | open-top chambers, 1994, 1.5 x ambient ozone, total biomass | 74% | 
 |  | 
| Fiscus et al. (1997) | open-top chambers, 1995, ambient ozone, seed yield | -6% | 
 |  | 
| Fiscus et al. (1997) | open-top chambers, 1995, 1.5 x ambient ozone, seed yield | 82% | 
 |  | 
| Fiscus et al. (2007) | Seed biomass of well watered and fertilized plants grown from seed for one full growing season out-of-doors rooted in the ground and enclosed by open-top chambers | 20% | 
 |  | 
| Fiscus et al. (2007) | Seed biomass of well watered and fertilized plants grown from seed for one full growing season out-of-doors rooted in pots at equal plant densities per unit ground area and enclosed by open-top chambers | 16% | 
 |  | 
| Fiscus et al. (2007) | Stem biomass of well watered and fertilized plants grown from seed for one full growing season out-of-doors rooted in the ground and enclosed by open-top chambers | 38% | 
 |  | 
| Fiscus et al. (2007) | Stem biomass of well watered and fertilized plants grown from seed for one full growing season out-of-doors rooted in pots at equal plant densities per unit ground area and enclosed by open-top chambers | 38% | 
 |  | 
| Griffin et al. (1999) | controlled growth chambers |  | 94% |  | 
| Hao et al. (2014) | Seed yield biomass of plants grown out-of-doors at the China Mini-FACE facility near Changping, Beijing under normal field conditions in 2009, as part of a wheat/soybean rotation | 58% | 
 |  | 
| Hao et al. (2014) | Seed yield biomass of plants grown out-of-doors at the China Mini-FACE facility near Changping, Beijing under normal field conditions in 2011, as part of a wheat/soybean rotation | 69% | 
 |  | 
| Havelka et al. (1984a) | field, open-top chambers |  | 
 | 59% | 
| Havelka et al.. (1984b) | field, open-top chambers |  | 
 | 86% | 
| Heagle et al. (1998) | open-top chambers, seed weight, 1994, Essex cultivar, high ozone | 70% | 
 |  | 
| Heagle et al. (1998) | open-top chambers, seed weight, 1994, Holladay cultivar, low ozone | 33% | 
 |  | 
| Heagle et al. (1998) | open-top chambers, seed weight, 1994, Holladay cultivar, medium ozone | 71% | 
 |  | 
| Heagle et al. (1998) | open-top chambers, seed weight, 1994, Holladay cultivar, high ozone | 80% | 
 |  | 
| Heagle et al. (1998) | open-top chambers, seed weight, 1994,NK-6955 cultivar, low ozone | 6% | 
 |  | 
| Heagle et al. (1998) | open-top chambers, seed weight, 1994,NK-6955 cultivar, medium ozone | 6% | 
 |  | 
| Heagle et al. (1998) | open-top chambers, seed weight, 1994,NK-6955 cultivar, high ozone | 33% | 
 |  | 
| Heagle et al. (1998) | open-top chambers, seed weight, 1993, Essex cultivar, low ozone | 4% | 
 |  | 
| Heagle et al. (1998) | open-top chambers, seed weight, 1993, Essex cultivar, medium ozone | 22% | 
 |  | 
| Heagle et al. (1998) | open-top chambers, seed weight, 1993, Essex cultivar, high ozone | 68% | 
 |  | 
| Heagle et al. (1998) | open-top chambers, seed weight, 1994, Essex cultivar, low ozone | 25% | 
 |  | 
| Heagle et al. (1998) | open-top chambers, seed weight, 1994, Essex cultivar, medium ozone | 20% | 
 |  | 
| Heagle et al. (1999) | open-top chambers, plants in the ground | 30% | 
 |  | 
| Heagle et al. (1999) | open-top chambers, plants in pots | 32% | 
 |  | 
| Heinemann et al. (2006) | Seed biomass of well-watered and fertilized plants grown from seed to maturity in pots in controlled environment chambers at a day/night temperature of 20/15°C | 9% | 
 |  | 
| Heinemann et al. (2006) | Seed biomass of well-watered and fertilized plants grown from seed to maturity in pots in controlled environment chambers at a day/night temperature of 30/25°C | 8% | 
 |  | 
| Hrubec et al. (1985) | pots (15-cm), growth chambers |  | 33% |  | 
| Huber et al. (1984) | field | 84% | 
 |  | 
| Huber et al. (1984) | field | 67% | 
 |  | 
| Idso et al. (1987) | field, moderate temperature | 100% | 
 |  | 
| Idso et al. (1987) | field, high temperature | 160% | 
 |  | 
| Imai and Murata (1979) | Adequately watered plants grown from seed in pots containing 0.5 kg of soil and 2.5 g of chemical fertilizer for 10 to 15 days after emergence and then transferred to growth chambers for five additional days of growth at low light (27 lux) and at low day/night temperatures (23/20°C) |  | 42% |  | 
| Imai and Murata (1979) | Adequately watered plants grown from seed in pots containing 0.5 kg of soil and 2.5 g of chemical fertilizer for 10 to 15 days after emergence and then transferred to growth chambers for five additional days of growth at low light (27 lux) and at high day/night temperatures (28/23°C) |  | 62% |  | 
| Imai and Murata (1979) | Adequately watered plants grown from seed in pots containing 0.5 kg of soil and 2.5 g of chemical fertilizer for 10 to 15 days after emergence and then transferred to growth chambers for five additional days of growth at high light (48 lux) and at low day/night temperatures (23/20°C) | 50% | 
 |  | 
| Imai and Murata (1979) | Adequately watered plants grown from seed in pots containing 0.5 kg of soil and 2.5 g of chemical fertilizer for 10 to 15 days after emergence and then transferred to growth chambers for five additional days of growth at high light (48 lux) and at high day/night temperatures (28/23°C) |  | 74% |  | 
| Jin et al. (2017) | Shoot biomass of well-watered and fertilized plants grown in pots in open-top chambers in soil with low (10.4 mg per g) organic carbon content; cv Suinong 14 | 38% | 
 |  | 
| Jin et al. (2017) | Shoot biomass of well-watered and fertilized plants grown in pots in open-top chambers in soil with low (10.4 mg per g) organic carbon content; cv Dongsheng 7 | 55% | 
 |  | 
| Jin et al. (2017) | Shoot biomass of well-watered and fertilized plants grown in pots in open-top chambers in soil with high (45.5 mg per g) organic carbon content; cv Suinong 14 | 40% | 
 |  | 
| Jin et al. (2017) | Shoot biomass of well-watered and fertilized plants grown in pots in open-top chambers in soil with high (45.5 mg per g) organic carbon content; cv Dongsheng 7 | 53% | 
 |  | 
| Jin et al. (2017) | Grain yield (g per plant) of well-watered and fertilized plants grown in pots in open-top chambers in soil with low (10.4 mg per g) organic carbon content; cv Suinong 14 | 19% | 
 |  | 
| Jin et al. (2017) | Grain yield (g per plant) of well-watered and fertilized plants grown in pots in open-top chambers in soil with low (10.4 mg per g) organic carbon content; cv Dongsheng 7 | 53% | 
 |  | 
| Jin et al. (2017) | Grain yield (g per plant) of well-watered and fertilized plants grown in pots in open-top chambers in soil with high (45.5 mg per g) organic carbon content; cv Suinong 14 | 41% | 
 |  | 
| Jin et al. (2017) | Grain yield (g per plant) of well-watered and fertilized plants grown in pots in open-top chambers in soil with high (45.5 mg per g) organic carbon content; cv Dongsheng 7 | 61% | 
 |  | 
| Jones et al. (1984) | soil bins, growth chambers | 40% | 61% |  | 
| Juknys et al. (2011) | Aboveground biomass of plants grown from seed for 21 days after germination within controlled-environment chambers at a density of 25 plants per each of three 5-L pots per treatment filled with neutral (pH 6.0-6.5) peat substrate | 21% | 
 |  | 
| Kanemoto et al. (2009) | Well watered and fertilized plants grown to the grain-filling stage in pots within a glasshouse and then transferred for six additional days to growth cabinets maintained at different air CO2 |  | 110% |  | 
| Kim et al. (2005) | Total biomass of plants grown from seed to maturity in pots of sandy loam soil placed within controlled environment chambers maintained at ambient temperature with no added nitrogen | 99% | 
 |  | 
| Kim et al. (2005) | Total biomass of plants grown from seed to maturity in pots of sandy loam soil placed within controlled environment chambers maintained at ambient temperature and with an extra 40 kg N/ha | 109% | 
 |  | 
| Kim et al. (2005) | Total biomass of plants grown from seed to maturity in pots of sandy loam soil placed within controlled environment chambers maintained at elevated temperature (Ambient + 5°C) with no added nitrogen | 61% | 
 |  | 
| Kim et al. (2005) | Total biomass of plants grown from seed to maturity in pots of sandy loam soil placed within controlled environment chambers maintained at elevated temperature (Ambient + 5°C) and with an extra 40 kg N/ha | 70% | 
 |  | 
| Kohler et al. (2019) | Seed yield at harvest in 2014 of plants grown in a FACE environment in Illinois, USA; cv Thorne | 18% | 
 |  | 
| Kohler et al. (2019) | Seed yield at harvest in 2015 of plants grown in a FACE environment in Illinois, USA; cv Thorne | 35% | 
 |  | 
| Kohler et al. (2019) | Seed yield at harvest in 2014 of plants grown in a FACE environment in Illinois, USA, under a day/night temperature regime that was 2.7/3.4°C warmer (using infrared heaters) than ambient temperatures; cv Thorne | 35% | 
 |  | 
| Kohler et al. (2019) | Seed yield at harvest in 2015 of plants grown in a FACE environment in Illinois, USA, under a day/night temperature regime that was 2.7/3.4°C warmer (using infrared heaters) than ambient temperatures; cv Thorne | 49% | 
 |  | 
| Koti et al. (2007) | Average biomass of six different genotypes grown from seed to maturity in 2.5-L pots in Soil-Plant-Atmosphere-Research (SPAR) units under well watered and fertilized conditions | 18% | 
 |  | 
| Koti et al. (2007) | Greatest genotype responder of six different genotypes grown from seed to maturity in 2.5-L pots in Soil-Plant-Atmosphere-Research (SPAR) units under well watered and fertilized conditions | 35% | 
 |  | 
| Lam et al. (2012) | Above-ground biomass of adequately fertilized and irrigated plants of a high-protein cultivar (Zhonghuang 13) grown from seed to maturity at a FACE facility in Changping, Beijing, China | 41% | 
 |  | 
| Lam et al. (2012) | Below-ground biomass of adequately fertilized and irrigated plants of a high-protein cultivar (Zhonghuang 13) grown from seed to maturity at a FACE facility in Changping, Beijing, China | 25% | 
 |  | 
| Lam et al. (2012) | Above-ground biomass of adequately fertilized and irrigated plants of a high-protein cultivar (Zhonghuang 35) grown from seed to maturity at a FACE facility in Changping, Beijing, China | 35% | 
 |  | 
| Lam et al. (2012) | Below-ground biomass of adequately fertilized and irrigated plants of a high-protein cultivar (Zhonghuang 35) grown from seed to maturity at a FACE facility in Changping, Beijing, China | 44% | 
 |  | 
| Lee et al. (1997) | open-top chambers | 27% | 
 |  | 
| Lee et al. (1997) | open-top chambers, low SO2 | 65% | 
 |  | 
| Lee et al. (1997) | open-top chambers, high SO2 | 2% | 
 |  | 
| Lenka et al. (2017) | Grain yield at harvest of well-fertilized and rain-fed plants grown outdoors in open-top chambers under ambient air temperatures; cv JS-20-29 | 102% | 
 |  | 
| Lenka et al. (2017) | Grain yield at harvest of well-fertilized and rain-fed plants grown outdoors in open-top chambers under elevated air temperatures (ambient plus 2°C); cv JS-20-29 | 53% | 
 |  | 
| Lenka et al. (2019) | Seed yield of plants grown in the field in open-top chambers without soil nitrogen application; cv JS-20-29 | 84% | 
 |  | 
| Lenka et al. (2019) | Seed yield of plants grown in the field in open-top chambers with a soil nitrogen application that was 50% of the recommended dose; cv JS-20-29 | 126% | 
 |  | 
| Lenka et al. (2019) | Seed yield of plants grown in the field in open-top chambers with a soil nitrogen application that was 100% of the recommended dose; cv JS-20-29 | 109% | 
 |  | 
| Lenka et al. (2019) | Seed yield of plants grown in the field in open-top chambers with a soil nitrogen application that was 150% of the recommended dose; cv JS-20-29 | 56% | 
 |  | 
| Li et al. (2017) | Shoot dry weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Xiaohuangjin | 163% | 
 |  | 
| Li et al. (2017) | Shoot dry weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Suinong 14 | 121% | 
 |  | 
| Li et al. (2017) | Shoot dry weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Suinong 8 | 93% | 
 |  | 
| Li et al. (2017) | Shoot dry weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Heinong 45 | 41% | 
 |  | 
| Li et al. (2017) | Shoot dry weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Suinong 22 | 61% | 
 |  | 
| Li et al. (2017) | Shoot dry weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Hejiao 6 | 76% | 
 |  | 
| Li et al. (2017) | Shoot dry weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Nenfeng 9 | 74% | 
 |  | 
| Li et al. (2017) | Shoot dry weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Nenfeng 1 | 59% | 
 |  | 
| Li et al. (2017) | Seed yield at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Xiaohuangjin | 171% | 
 |  | 
| Li et al. (2017) | Seed yield weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Suinong 14 | 116% | 
 |  | 
| Li et al. (2017) | Seed yield weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Suinong 8 | 64% | 
 |  | 
| Li et al. (2017) | Seed yield weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Heinong 45 | 34% | 
 |  | 
| Li et al. (2017) | Seed yield weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Suinong 22 | 62% | 
 |  | 
| Li et al. (2017) | Seed yield weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Hejiao 6 | 65% | 
 |  | 
| Li et al. (2017) | Seed yield weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Nenfeng 9 | 65% | 
 |  | 
| Li et al. (2017) | Seed yield weight at harvest (120 days after sowing) of well-watered and fertilized plants grown in pots in open-top chambers; cv Nenfeng 1 | 23% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Suinong 8 | 150% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Mufeng 5 | 128% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Fengshou 17 | 87% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Dongsheng 1 | 61% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Fengshou 10 | 42% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Dongsheng 7 | 46% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Beifeng 3 | 78% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Suinong 22 | 40% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Xiaohuangjin | 71% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Suinong 4 | 38% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Heinong 27 | 77% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Heinong 45 | 54% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Heinong 16 | 37% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Suinong 3 | 45% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Zihua 4 | 46% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Nenfeng 4 | 43% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Dongnong 4 | 50% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Suinong 14 | 32% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Dongsheng 8 | 43% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Nenfeng 1 | 17% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Suinong 10 | 29% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Suinong 15 | 20% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Yuanbaojin | 6% | 
 |  | 
| Li et al. (2019) | Seed yield at harvest of well-watered and fertilized plants grown in pots in open-top chambers; cv Silijia | 12% | 
 |  | 
| Lincoln et al. (1984) | greenhouse, growth chambers | 19% | 
 |  | 
| Matsunami et al. (2009) | Well watered and fertilized plants grown from seed in pots within temperature-gradient chambers at elevated (ambient +4.5°C) air temperature (T), measured at 35 days after sowing (DAS); cv. Enrei | 44% | 
 |  | 
| Matsunami et al. (2009) | Well watered and fertilized plants grown from seed in pots within temperature-gradient chambers at elevated (ambient +4.5°C) air temperature (T), measured at 69 days after sowing (DAS); cv. Enrei | 29% | 
 |  | 
| Matsunami et al. (2009) | Well watered and fertilized plants grown from seed in pots within temperature-gradient chambers at elevated (ambient +4.5°C) air temperature (T), measured at 35 days after sowing (DAS); cv. Kanto 100 | 26% | 
 |  | 
| Matsunami et al. (2009) | Well watered and fertilized plants grown from seed in pots within temperature-gradient chambers at elevated (ambient +4.5°C) air temperature (T), measured at 69 days after sowing (DAS); cv. Kanto 100 | 32% | 
 |  | 
| Matsunami et al. (2009) | Well watered and fertilized plants grown from seed in pots within temperature-gradient chambers at elevated (ambient +4.5°C) air temperature (T), measured at 35 days after sowing (DAS); cv. En1282 | 38% | 
 |  | 
| Matsunami et al. (2009) | Well watered and fertilized plants grown from seed in pots within temperature-gradient chambers at elevated (ambient +4.5°C) air temperature (T), measured at 69 days after sowing (DAS); cv. En1282 | -6% | 
 |  | 
| Miglietta et al. (1993) | Plants grown from seed to maturity in pots with 10 dm3 soil near a CO2-emitting spring | 85% | 
 |  | 
| Miller et al. (1998) | open top chamber, low ozone, 15 days after planting | 30% | 
 |  | 
| Miller et al. (1998) | open top chamber, medium ozone, 15 days after planting | 20% | 
 |  | 
| Miller et al. (1998) | open top chamber, high ozone, 15 days after planting | 27% | 
 |  | 
| Miller et al. (1998) | open top chamber, low ozone, 43 days after planting | 47% | 
 |  | 
| Miller et al. (1998) | open top chamber, medium ozone, 43 days after planting | 63% | 
 |  | 
| Miller et al. (1998) | open top chamber, high ozone, 43 days after planting | 65% | 
 |  | 
| Miller et al. (1998) | open top chamber, low ozone, 57 days after planting | 55% | 
 |  | 
| Miller et al. (1998) | open top chamber, medium ozone, 57 days after planting | 80% | 
 |  | 
| Miller et al. (1998) | open top chamber, high ozone, 57 days after planting | 89% | 
 |  | 
| Miller et al. (1998) | open top chamber, low ozone, 113 days after planting | 42% | 
 |  | 
| Miller et al. (1998) | open top chamber, medium ozone, 113 days after planting | 48% | 
 |  | 
| Miller et al. (1998) | open top chamber, high ozone, 113 days after planting | 66% | 
 |  | 
| Miyagi et al. (2007) | N-fixing root nodule biomass of well watered and fertilized plants (legumes) grown from seed to maturity in 4-liter pots filled with sand out-of-doors in open-top chambers | 124% | 
 |  | 
| Miyagi et al. (2007) | Seed or grain yield biomass of well watered and fertilized plants grown from seed to maturity in 4-liter pots filled with sand out-of-doors in open-top chambers | 70% | 
 |  | 
| Miyagi et al. (2007) | Whole plant biomass (at flowering) of well watered and fertilized plants grown from seed in 4-liter pots filled with sand out-of-doors in open-top chambers to the time of their natural death | 16% | 
 |  | 
| Miyagi et al. (2007) | Whole plant biomass (at time of death) of well watered and fertilized plants grown from seed in 4-liter pots filled with sand out-of-doors in open-top chambers to the time of their natural death | 52% | 
 |  | 
| Morgan et al. (2005) | Seed yield of plants grown for three different years under normal field conditions and agricultural practices at Urbana-Champaign, Illinois, USA, in a FACE study where CO2 was supplied from sunrise to sunset | 25% | 
 |  | 
| Morison and Gifford (1984) | pots (3.2 kg soil) | 4% | 
 |  | 
| Nakamoto et al. (2004) | First year seed biomass of well-watered and fertilized plants grown from seed in pots in growth chambers | 11% | 
 |  | 
| Nakamoto et al. (2004) | Second year seed biomass of well-watered and fertilized plants grown from seed in pots in growth chambers | 22% | 
 |  | 
| Nakamura et al. (1999) | growth cabinets, nodulated plants, no nitrogen | 38% | 
 |  | 
| Nakamura et al. (1999) | growth cabinets, nodulated plants, elevated nitrogen | 77% | 
 |  | 
| Nakamura et al. (1999) | growth cabinets, non-nodulated plants, no nitrogen | 6% | 
 |  | 
| Nakamura et al. (1999) | growth cabinets, non-nodulated plants, elevated nitrogen | 50% | 
 |  | 
| Oikawa et al. (2010) | Stem biomass of well watered and fertilized plants grown from seed to maturity -- one to each 4-L pot filled with soil collected from a rice paddy -- within temperature-controlled greenhouse chambers | 37% | 
 |  | 
| Oikawa et al. (2010) | Root biomass of well watered and fertilized plants grown from seed to maturity -- one to each 4-L pot filled with soil collected from a rice paddy -- within temperature-controlled greenhouse chambers | 40% | 
 |  | 
| Oikawa et al. (2010) | Pod biomass of well watered and fertilized plants grown from seed to maturity -- one to each 4-L pot filled with soil collected from a rice paddy -- within temperature-controlled greenhouse chambers | 47% | 
 |  | 
| Oikawa et al. (2010) | Seed biomass of well watered and fertilized plants grown from seed to maturity -- one to each 4-L pot filled with soil collected from a rice paddy -- within temperature-controlled greenhouse chambers | 52% | 
 |  | 
| Oikawa et al. (2010) | Nodule biomass of well watered and fertilized plants grown from seed to maturity -- one to each 4-L pot filled with soil collected from a rice paddy -- within temperature-controlled greenhouse chambers | 55% | 
 |  | 
| Palacios et al. (2019) | Grain biomass at harvest of well-watered and fertilized plants grown in open-top chambers under ambient temperature conditions; cv MG/BR Conquista |  | 40% |  | 
| Palacios et al. (2019) | Grain biomass at harvest of well-watered and fertilized plants grown in open-top chambers under elevated temperature conditions (ambient +4°C); cv MG/BR Conquista |  | 39% |  | 
| Patterson et al. (1984) | pots (0.75 liter), growth chambers | 39% | 
 |  | 
| Peet (1984) | pots |  | 23% |  | 
| Prevost et al. (2010) | Shoot biomass of plants (cultivar Lotus) grown from seed for six weeks in pots filled with a sandy loam soil, watered and fertilized as per standard procedures, and inoculated with a reference strain of the nitrogen-fixing bacteria Bradyrhizobium japonicum widely used in commercial operations in Canada (532c) | 16% | 
 |  | 
| Prevost et al. (2010) | Root nodule biomass of plants (cultivar Lotus) grown from seed for six weeks in pots filled with a sandy loam soil, watered and fertilized as per standard procedures, and inoculated with a reference strain of the nitrogen-fixing bacteria Bradyrhizobium japonicum widely used in commercial operations in Canada (532c) | 36% | 
 |  | 
| Prevost et al. (2010) | Shoot biomass of plants (cultivar Lotus) grown from seed for six weeks in pots filled with a sandy loam soil, watered and fertilized as per standard procedures, and inoculated with a strain of the nitrogen-fixing bacteria Bradyrhizobium japonicum indigenous to soils of Quebec, Canada (12NS14) | 32% | 
 |  | 
| Prevost et al. (2010) | Root nodule biomass of plants (cultivar Lotus) grown from seed for six weeks in pots filled with a sandy loam soil, watered and fertilized as per standard procedures, and inoculated with a strain of the nitrogen-fixing bacteria Bradyrhizobium japonicum indigenous to soils of Quebec, Canada (12NS14) | 75% | 
 |  | 
| Prior et al. (2005) | Plants grown from seed to maturity for two cropping cycles within open-top chambers constructed upon 7-m x 76-m x 2-m-deep soil bins filled with a reconstructed Decatur silt loam; first cropping cycle | 39% | 
 |  | 
| Prior et al. (2005) | Grain yield of plants grown from seed to maturity for two cropping cycles within open-top chambers constructed upon 7-m x 76-m x 2-m-deep soil bins filled with a reconstructed Decatur silt loam; second cropping cycle | 51% | 
 |  | 
| Prior et al. (2005) | Residue biomass of plants grown from seed to maturity for two cropping cycles within open-top chambers constructed upon 7-m x 76-m x 2-m-deep soil bins filled with a reconstructed Decatur silt loam; two cropping cycle | 48% | 
 |  | 
| Reddy et al. (1989) | bins, growth chambers, total seasonal CO2 fixation | 21% | 69% |  | 
| Rogers et al. (1983) | pots (15.5 liter), field, open-top chambers | 42% | 96% |  | 
| Rogers et al. (1983) | pots (16.5 liter), field, open-top chambers | 79% | 86% |  | 
| Rogers et al. (1984) | pots (16.5 liter) | 31% | 40% |  | 
| Rogers et al. (1986) | field, water-stressed | 35% | 
 |  | 
| Rogers et al. (1986) | field, well-watered | 0% | 
 |  | 
| Rogers et al. (2006) | Plants grown for two entire seasons without nitrogen (N) fertilization from germination to final senescence under normal climatic conditions at the SoyFACE facility in Champaign, Illinois, USA | 26% | 
 |  | 
| Sanz-Sáez et al. (2017) | Seed yield of FACE-grown from the 2012 growing season; cv HS93-4118 | 20% | 
 |  | 
| Sanz-Sáez et al. (2017) | Seed yield of FACE-grown from the 2012 growing season; cv Loda | 38% | 
 |  | 
| Sanz-Sáez et al. (2017) | Seed yield of FACE-grown from the 2013 growing season; cv HS93-4118 | 33% | 
 |  | 
| Sanz-Sáez et al. (2017) | Seed yield of FACE-grown from the 2013 growing season; cv Loda | 35% | 
 |  | 
| Sanz-Sáez et al. (2017) | Seed yield of FACE-grown from the 2014 growing season; cv HS93-4118 | 29% | 
 |  | 
| Sanz-Sáez et al. (2017) | Seed yield of FACE-grown from the 2014 growing season; cv Loda | 39% | 
 |  | 
| Serraj et al. (1999) | Grown from seed in 10-cm diameter x 30-cm deep pots in glasshouses for two weeks; Well-watered | 6% | 
 |  | 
| Serraj et al. (1999) | Grown from seed in 10-cm diameter x 30-cm deep pots in glasshouses for two weeks; Well-watered | 9% | 
 |  | 
| Serraj et al. (1999) | Grown from seed in 10-cm diameter x 30-cm deep pots in glasshouses for two weeks; Water-stressed | 32% | 
 |  | 
| Serraj et al. (1999) | Grown from seed in 10-cm diameter x 30-cm deep pots in glasshouses for two weeks; Water-stressed | 26% | 
 |  | 
| Serraj and Sinclair (2003) | glasshouse, hydroponics, shoot, 0 mM ureide | 16% | 
 |  | 
| Serraj and Sinclair (2003) | glasshouse, hydroponics, shoot, 5 mM ureide | 1% | 
 |  | 
| Serraj and Sinclair (2003) | glasshouse, hydroponics, shoot, 10 mM ureide | 31% | 
 |  | 
| Serraj and Sinclair (2003) | glasshouse, hydroponics, root, 0 mM ureide | -7% | 
 |  | 
| Serraj and Sinclair (2003) | glasshouse, hydroponics, root, 5 mM ureide | 12% | 
 |  | 
| Serraj and Sinclair (2003) | glasshouse, hydroponics, root, 10 mM ureide | 15% | 
 |  | 
| Shimono et al. (2012) | Above-ground biomass of two-week-old plants grown from seed for two additional weeks at Tsukuba (Japan), one to each 4-L pot, in soil inoculated with Rhizobium within sunlit temperature-gradient chambers under normal moisture (NM) conditions | 26% | 
 |  | 
| Shimono et al. (2012) | Above-ground biomass of two-week-old plants grown from seed for two additional weeks at Tsukuba (Japan), one to each 4-L pot, in soil inoculated with Rhizobium within sunlit temperature-gradient chambers under water-logged (WL) conditions | 24% | 
 |  | 
| Shimono et al. (2012) | Root biomass of two-week-old plants grown from seed for two additional weeks at Tsukuba (Japan), one to each 4-L pot, in soil inoculated with Rhizobium within sunlit temperature-gradient chambers under normal moisture (NM) conditions | 23% | 
 |  | 
| Shimono et al. (2012) | Root biomass of two-week-old plants grown from seed for two additional weeks at Tsukuba (Japan), one to each 4-L pot, in soil inoculated with Rhizobium within sunlit temperature-gradient chambers under water-logged (WL) conditions | 22% | 
 |  | 
| Sicher et al. (2010) | Well watered and fertilized plants of a dwarf (MiniMax) variety grown from seed to maturity within controlled-environment chambers in pots filled with vermiculite |  | 46% |  | 
| Sicher et al. (2010) | Well watered and fertilized plants of a normal-sized (Fiskeby) variety grown from seed to maturity within controlled-environment chambers in pots filled with vermiculite |  | 193% |  | 
| Singh and Reddy (2017) | Total dry matter at maturity (112 days after planting) of plants grown in controlled environment chambers under normal (control) levels of potassium (5.00 mM K); cv Spencer | 18% | 
 |  | 
| Singh and Reddy (2017) | Total dry matter at maturity (112 days after planting) of plants grown in controlled environment chambers under deficient levels of potassium (0.50 mM K); cv Spencer | 48% | 
 |  | 
| Singh and Reddy (2017) | Total dry matter at maturity (112 days after planting) of plants grown in controlled environment chambers under super deficient levels of potassium (0.02 mM K); cv Spencer | 22% | 
 |  | 
| Sionit (1983) | pots (5 liter), low nutrient | 93% | 
 |  | 
| Sionit (1983) | pots (5 liter), high nutrient | 114% | 
 |  | 
| Sionit et al. (1987a) | pots (3.5 liter), air temperature 15°C | 65% | 130% |  | 
| Sionit et al. (1987a) | pots (3.5 liter), air temperature 19°C | 35% | 55% |  | 
| Sionit et al. (1987a) | pots (3.5 liter), air temperature 23°C | 53% | 123% |  | 
| Sionit et al. (1987b) | pots (3.5 liter), air temperature 15°C | 0% | 0% |  | 
| Sionit et al. (1987b) | pots (3.5 liter), air temperature 19°C | 5% | 55% |  | 
| Sionit et al. (1987b) | pots (3.5 liter), air temperature 23°C | 42% | 45% |  | 
| Teramura et al. (1990) | pots (0.5 liter to 20 liter) | 29% | 
 |  | 
| Torbert et al. (2004) | Plants grown from seed to physiological maturity in 1992, 1993 and 1994 within open-top chambers resting upon huge soil bins in which the plants were rooted; mean whole plant biomass of all three years | 34% | 
 |  | 
| Vu et al. (1988) | pots (10-cm), growth chambers | 46% | 75% |  | 
| Wang et al. (2018) | Aboveground biomass at harvest of well-watered (soil water content of 60-80% of relative water content) and fertilized plants grown in open-top chambers in 2013; cv Zhonghuang 35 | 16% | 
 |  | 
| Wang et al. (2018) | Aboveground biomass at harvest of water-stressed (soil water content of 35-45% of relative water content) and fertilized plants grown in open-top chambers in 2013; cv Zhonghuang 35 | 6% | 
 |  | 
| Wang et al. (2018) | Aboveground biomass at harvest of well-watered (soil water content of 60-80% of relative water content) and fertilized plants grown in open-top chambers in 2014; cv Zhonghuang 35 | 30% | 
 |  | 
| Wang et al. (2018) | Aboveground biomass at harvest of water-stressed (soil water content of 35-45% of relative water content) and fertilized plants grown in open-top chambers in 2014; cv Zhonghuang 35 | 144% | 
 |  | 
| Wang et al. (2018) | Seed yield at harvest of well-watered (soil water content of 60-80% of relative water content) and fertilized plants grown in open-top chambers in 2013; cv Zhonghuang 35 | 5% | 
 |  | 
| Wang et al. (2018) | Seed yield at harvest of water-stressed (soil water content of 35-45% of relative water content) and fertilized plants grown in open-top chambers in 2013; cv Zhonghuang 35 | 2% | 
 |  | 
| Wang et al. (2018) | Seed yield at harvest of well-watered (soil water content of 60-80% of relative water content) and fertilized plants grown in open-top chambers in 2014; cv Zhonghuang 35 | 31% | 
 |  | 
| Wang et al. (2018) | Seed yield at harvest of water-stressed (soil water content of 35-45% of relative water content) and fertilized plants grown in open-top chambers in 2014; cv Zhonghuang 35 | 145% | 
 |  | 
| Wong (1990) | pots (5 liters), 24 mM NO3- | 111% | 
 |  | 
| Wong (1990) | pots (5 liters), 12 mM NO3- | 229% | 
 |  | 
| Wong (1990) | pots (5 liters), 4 mM NO3- | 144% | 
 |  | 
| Wong (1990) | pots (5 liters), 0.06 mM NO3- | 89% | 
 |  | 
| Zhang et al. (2018) | Seed weight at harvest of well-watered and fertilized plants grown in open-top chambers in 2013; cv Lamar | 13% | 
 |  | 
| Zhang et al. (2018) | Seed weight at harvest of well-watered and fertilized plants grown in open-top chambers in 2013; cv JLNMH | 3% | 
 |  | 
| Zhang et al. (2018) | Seed weight at harvest of well-watered and fertilized plants grown in open-top chambers in 2014; cv Lamar | 21% | 
 |  | 
| Zhang et al. (2018) | Seed weight at harvest of well-watered and fertilized plants grown in open-top chambers in 2014; cv JLNMH | 17% | 
 |  | 
| Zhang et al. (2018) | Seed weight at harvest of well-watered and fertilized plants grown in open-top chambers in 2015; cv Lamar | 13% | 
 |  | 
| Zhang et al. (2018) | Seed weight at harvest of well-watered and fertilized plants grown in open-top chambers in 2015; cv JLNMH | 9% | 
 |  | 
| Zhang et al. (2018) | Total biomass at the R6 stage (i.e., full seeds) of well-watered and fertilized plants grown in open-top chambers, averaged for 3 growing seasons (2013-2015); cv Lamar | 13% | 
 |  | 
| Zhang et al. (2018) | Total biomass at the R6 stage (i.e., full seeds) of well-watered and fertilized plants grown in open-top chambers, averaged for 3 growing seasons (2013-2015); cv JLNMH | 15% | 
 |  | 
| Ziska (1998) | controlled environment, temperature 25°C | 30% | 
 |  | 
| Ziska (1998) | controlled environment, temperature 30°C | 35% | 
 |  | 
| Ziska (2010) | Total biomass of plants grown from seed to maturity over three sequential years in partially (one-third) open-top chambers in the field near Beltsville, Maryland, USA, with no tillage and 100% weed control | 32% | 
 |  | 
| Ziska (2010) | Seed yield of plants grown from seed to maturity over three sequential years in partially (one-third) open-top chambers in the field near Beltsville, Maryland, USA, with no tillage and 100% weed control (range of yield was 18 to 42% increase) | 30% | 
 |  | 
| Ziska and Bunce (2000) | modified open-top chambers, Spencer cultivar | 132% | 
 |  | 
| Ziska and Bunce (2000) | modified open-top chambers, Spencer cultivar, yield | 60% | 
 |  | 
| Ziska and Bunce (2000) | modified open-top chambers, Ripley cultivar | 65% | 
 |  | 
| Ziska and Bunce (2000) | modified open-top chambers, Ripley cultivar, yield | 35% | 
 |  | 
| Ziska and Goins (2006) | Seed biomass of genetically modified (Round-up Ready) soybean plants grown in the field within aluminum chambers for two full growing seasons under conditions - both environmental and managerial, including herbicide (glyphosate) application - that led to a variety of different weed densities (gm-2) developing among the soybean plants, including 0 gm-2 | 30% | 
 |  | 
| Ziska and Goins (2006) | Seed biomass of genetically modified (Round-up Ready) soybean plants grown in the field within aluminum chambers for two full growing seasons under conditions - both environmental and managerial, including herbicide (glyphosate) application - that led to a variety of different weed densities (gm-2) developing among the soybean plants, including 200 gm-2 | 40% | 
 |  | 
| Ziska and Goins (2006) | Seed biomass of genetically modified (Round-up Ready) soybean plants grown in the field within aluminum chambers for two full growing seasons under conditions - both environmental and managerial, including herbicide (glyphosate) application - that led to a variety of different weed densities (gm-2) developing among the soybean plants, including 400 gm-2 | 60% | 
 |  | 
| Ziska and Goins (2006) | Seed biomass of genetically modified (Round-up Ready) soybean plants grown in the field within aluminum chambers for two full growing seasons under conditions - both environmental and managerial, including herbicide (glyphosate) application - that led to a variety of different weed densities (gm-2) developing among the soybean plants, including 600 gm-2 | 100% | 
 |  | 
| Ziska and Goins (2006) | Seed biomass of genetically modified (Round-up Ready) soybean plants grown in the field within aluminum chambers for two full growing seasons under conditions - both environmental and managerial, including herbicide (glyphosate) application - that led to a variety of different weed densities (gm-2) developing among the soybean plants, including 800 gm-2 | 300% | 
 |  | 
