Abstract
Soybean is a major grain crop in Brazil, and yields can be considerably improved by inoculation with selected Bradyrhizobium strains. However, the incompatibility between inoculation and seed treatments with fungicides and micronutrients represents a major barrier to the achievement of high rates of biological N2 fixation. Inoculation practices that can alleviate the negative effects of agrochemicals must therefore be found and in-furrow inoculation seems to be an attractive alternative. This study reports the results of seven field experiments conducted in three growing seasons in Brazil; three in soils previously cropped with inoculated soybean (> 10(4) cells g-1 of soil of Bradyrhizobium), and four in areas where the crop was sown for the first time (< 10² cells g-1 of soil of Bradyrhizobium). The compatibility with fungicides and micronutrients was compared in seeds inoculated with peat or liquid inoculants, or treated with different doses of liquid inoculant in-furrow. In areas with established Bradyrhizobium populations, seed-applied agrochemicals did generally not affect nodulation, but also did not increase yields, while inoculation always increased N grain accumulation or yield, and N fertilizer decreased both nodulation and yield. Where soybean was sown for the first time, the seed treatment with agrochemicals affected nodulation when applied together with peat or liquid inoculant. In-furrow inoculation alleviated the effects of seed treatment with agrochemicals; the best performance was achieved with high Bradyrhizobium cell concentrations, with up to 2.5 million cells seed-1.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Seed-applied agrochemicals did not affect nodulation in areas with established Bradyrhizobium populations.
- Taxon
- soybean
Glycine maxt0 - Treatment
- seed-applied agrochemicalse1
- Interactor
- Bradyrhizobium
Bradyrhizobiume1symbiont - Outcome
- nodulatione1
- Direction
- not affecte1
- Setting
- areas with established Bradyrhizobium populationse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“In-furrow inoculation of soybean”
e1“In areas with established Bradyrhizobium populations, seed-applied agrochemicals did generally not affect nodulation, but also did not increase yields”
Claim · model-written summary
Seed-applied agrochemicals did not increase soybean yields in areas with established Bradyrhizobium populations.
- Taxon
- soybeanGlycine maxt0
- Treatment
- seed-applied agrochemicalse1
- Outcome
- yieldse1
- Direction
- not increasee1
- Setting
- areas with established Bradyrhizobium populationse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“In-furrow inoculation of soybean”
e1“In areas with established Bradyrhizobium populations, seed-applied agrochemicals did generally not affect nodulation, but also did not increase yields”
Claim · model-written summary
Inoculation always increased N grain accumulation or yield of soybean.
- Taxon
- soybeanGlycine maxt0
- Treatment
- inoculatione2
- Outcome
- N grain accumulation or yielde2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“In-furrow inoculation of soybean”
e2“inoculation always increased N grain accumulation or yield”
Claim · model-written summary
N fertilizer decreased both nodulation and yield of soybean.
- Taxon
- soybeanGlycine maxt0
- Treatment
- N fertilizere3
- Outcome
- nodulation and yielde3
- Direction
- decreasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“In-furrow inoculation of soybean”
e3“N fertilizer decreased both nodulation and yield”
Claim · model-written summary
Seed treatment with agrochemicals affected soybean nodulation when applied with peat or liquid inoculant in first-time sown fields.
- Taxon
- soybeanGlycine maxt0
- Treatment
- seed treatment with agrochemicalse4
- Outcome
- nodulatione4
- Qualifier
- when applied together with peat or liquid inoculante4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“In-furrow inoculation of soybean”
e4“Where soybean was sown for the first time, the seed treatment with agrochemicals affected nodulation when applied together with peat or liquid inoculant”
Claim · model-written summary
In-furrow inoculation alleviated the effects of seed treatment with agrochemicals on soybean.
- Taxon
- soybeanGlycine maxt0
- Treatment
- In-furrow inoculatione5
- Outcome
- effects of seed treatment with agrochemicalse5
- Direction
- alleviatede5
- Comparator
- seed treatment with agrochemicalse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“In-furrow inoculation of soybean”
e5“In-furrow inoculation alleviated the effects of seed treatment with agrochemicals”
Claim · model-written summary
The best soybean performance was achieved with high Bradyrhizobium cell concentrations of up to 2.5 million cells per seed.
- Taxon
- soybeanGlycine maxt0
- Treatment
- high Bradyrhizobium cell concentrationse6
- Interactor
- BradyrhizobiumBradyrhizobiume6symbiont
- Outcome
- performancee6
- Direction
- beste6
- Value
- 2.5 million cells seed-1e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“In-furrow inoculation of soybean”
e6“the best performance was achieved with high Bradyrhizobium cell concentrations, with up to 2.5 million cells seed-1”
The same questions in other papers
agrochemical · yield · Glycine max (soybean)Results agree
1 paper in the same direction as this paper
- negative
inoculation · molecular: metabolites · Glycine max (soybean)Positive and negative results
66 papers in the same direction as this paper · 8 in the opposite direction
- no effect
- negative
- negative
71 papers more in this group
See all 75 papers →fertilization · symbiosis · Glycine max (soybean)Positive and negative results
49 papers in the same direction as this paper · 142 in the opposite direction
- positive
- positive
- positive
188 papers more in this group
See all 192 papers →inoculation · yield · Glycine max (soybean)Positive and negative results
490 papers in the same direction as this paper · 63 in the opposite direction · 12 reporting no difference from an alternative
- no effect
- positive
- positive
562 papers more in this group
See all 566 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.