Bacterial inoculation increased soybean seed yield by 65 to 134% versus control.

Bradyrhizobium japonicum · yield · Glycine max (soybean)Positive and negative results

53 papers in the same direction as this claim · 6 in the opposite direction · 1 reporting no difference from an alternative

1. positive
   Co-inoculation with B. japonicum and P. fluorescens plus 75% or 100% fertilizer significantly increased number of branches to 6.45 and 6.40 /plant.

   Effect of co-inoculation of Bradyrhizobium japonicum and Pseudomonas fluorescens on growth, yield and nutrient uptake in soybean [Glycine max (L.) Merrill] · 2018

   Same directionCited by this paper

2. no effect
   B. japonicum inoculation did not improve soybean performance under either nitrogen source.

   Effect of bacterial root symbiosis and urea as source of nitrogen on performance of soybean plants grown hydroponically for Bioregenerative Life Support Systems (BLSSs) · 2015

   Opposite direction

3. no effect
   Inoculation with A. brasilense associated with B. japonicum did not affect agronomic traits or grain yield of RR soybean cultivars.

   Morphoagronomic and productive traits of RR soybean due to inoculation via Azospirillum brasilense groove · 2016 · compared with without inoculation

   Opposite direction

4. no effect
   Inoculation with B. japonicum had no significant effect on soybean productivity.

   Soybean yield in response to foliar fertilization, seed treatment with molybdenium and Bradyrhizobium japonicum inoculation · 2008

   Opposite direction

5. no effect
   The inoculation did not influence soybean 100-grain weight in the two crop years.

   Inoculation of Bradyrhizobium with cellular additives and micronutrients in soybean seeds cultivated in Oxisol under no-tillage system · 2015

   Opposite direction

6. no effect
   The introduced B. japonicum had no essential effect on plant productivity.

   [Survival of Bradyrhizobium japonicum strain 646a introduced into soil of the soybean, common bean and maize rhizosphere]. · 2004

   Opposite direction

7. no effect
   Bradyrhizobium inoculants did not increase soybean seed yield.

   Bradyrhizobium japonicum Inoculants Have Little Effect in Kentucky's Soybean‐Corn Rotation · 2018

   Opposite direction

8. no effect
   Equal seed yields were obtained by dressing with 142 kg N/ha or by inoculating seeds with Bradyrhizobium japonicum.

   Quality and yield of soybean seeds as affected by inoculation, NPK fertilization, and soil salinity · 1990 · compared with dressing with 142 kg N ha‐1

   No difference from an alternative

52 papers more in this group

Pseudomonas · yield · Glycine max (soybean)Results agree

7 papers in the same direction as this claim

1. positive
   Bacterial application enhanced soybean yield components and grain yield.

   EFFECT OF BRADYRHIZOBIA AND PHOSPHATE SOLUBILIZING BACTERIA APPLICATION ON SOYBEAN IN ROTATIONAL SYSTEM IN THE MEKONG DELTA · 2006

   Same direction

2. positive
   Pseudomonas at 3 g kg-1 gave the highest soybean straw yield of 3241.6 kg ha-1.

   Effect of fungicides and bioagents on number of microorganisms in soil and yield of soybean (Glycine max) · 1970

   Same direction

3. positive
   Soybean yield was 43% higher with the microbial consortia treatment than with the control FUI.

   Effect of Microbial Consortia on Soil Health, Nutrient Uptake and Yield of Soybean Grown in a Vertisol of Central India · 2024 · compared with control FUI

   Same direction

4. positive
   Bradyrhizobium japonicum with Pseudomonas fluorencens enhanced soybean productivity.

   Growth-promoting bacteria in coinoculation in soybean · 2025

   Same direction

5. positive
   Co-inoculation of soybean with Bradyrhizobium and Pseudomonas significantly increased soybean growth, yield attributes and grain yield over single or no inoculation.

   Effect of application of biofertilizers to soybean (Glycine max) and nitrogen to tobacco (Nicotiana tabacum) in soybean – tobacco cropping system · 2007 · compared with individual inoculation and no inoculation

   Same direction

6. positive
   Trichoderma and Pseudomonas treatment improved soybean growth and production.

   Response to the growth of Soybean (Glycine max L.) Stadium Generative 1 on the application of Trichoderma sp and Pseudomonas flourescent as Biofertilizer · 2020

   Same direction

7. positive
   Co-inoculation increased soybean growth, yield attributes and grain yield compared with individual or no inoculation.

   Effect of application of biofertilizers to soybean (Glycine max) and nitrogen to tobacco (Nicotiuna tabacum) in soybean - tobacco cropping system · 2001 · compared with their individual inoculation and no inoculation

   Same direction

inoculation · yield · Glycine max (soybean)Positive and negative results

490 papers in the same direction as this claim · 63 in the opposite direction · 12 reporting no difference from an alternative

1. positive
   Co-inoculation of bradyrhizobia and azospirilla increased soybean yield without chemical nitrogen fertilizer, even in soils with established soybean bradyrhizobia.

   Soybean Seed Co-Inoculation with Bradyrhizobium spp. and Azospirillum brasilense: A New Biotechnological Tool to Improve Yield and Sustainability · 2015

   Same directionCited by this paper

2. positive
   Co-inoculation with B. japonicum and P. fluorescens plus 75% or 100% fertilizer significantly increased number of branches to 6.45 and 6.40 /plant.

   Effect of co-inoculation of Bradyrhizobium japonicum and Pseudomonas fluorescens on growth, yield and nutrient uptake in soybean [Glycine max (L.) Merrill] · 2018

   Same directionCited by this paper

3. positive
   Bacteria-inoculated soybean seed gave the highest grain yield, 3645 kg ha-1, compared with non-inoculated seed.

   Nitrogen Application and Seed Inoculation withBradyrhizobium japonicum Bacteria ImprovedYield and Quality Traits of Soybean [Glycinemax (L.) Merrill] Grown as Second Crop · 2024 · compared with non-inoculated

   Same directionCites this paper

4. no effect
   Inoculation did not significantly change soybean seed yield in either year.

   Persistence and Recovery of Rhizobium japonicum Inoculum in a Field Soil¹ · 1984

   Opposite direction

5. no effect
   Across 63 environments, inoculants did not produce a soybean yield response significantly different from zero relative to untreated control.

   Probability of Yield Response to Inoculants in Fields with a History of Soybean · 2010 · compared with an untreated control

   Opposite direction

6. no effect
   Soybean soybean seed yield was unaffected by additional soil inoculation at V4 inoculation.

   Soybean yield, biological N2 fixation and seed composition responses to additional inoculation in the United States · 2019

   Opposite direction

7. no effect
   Inoculants did not significantly affect soybean seed yield on relatively high nitrogen soils.

   Yield and N Content of Soybean Seed as Influenced by Rhizobium japonicum Inoculants Possessing the Hydrogenase Characteristic¹ · 1981

   Opposite direction

8. no effect
   Inoculation did not significantly affect seed yield.

   Effects of Soil Water on Rhizobium japonicum Infection, Nitrogen Accumulation, and Yield in Bragg Soybeans¹ · 1981

   Opposite direction

557 papers more in this group