Abstract
Research on the effects of N and B applications on soybean [ Glycine max (L.) Merr.] yield is limited. Experiments were conducted to determine the effect of (i) application rate and reproductive stage timing of N or B on soybean seed yield and (ii) cultivar, row spacing, or planting date on the response of soybean to R3‐stage N and B applications. Nitrogen was applied to the soil at 0, 14, 28, 56, 84, 112, or 168 kg ha −1 , or B was applied to the foliage at 0, 0.14, 0.28, or 0.56 kg ha −1 to either R3‐ or R5‐stage soybean in the rate and timing experiments. Treatments for the cultivar, row‐spacing, and planting‐date experiments included 0 + 0, 56 + 0, 0 + 0.28, and 56 + 0.28 kg ha −1 N + B, respectively. In yield environments ranging from 2400 to 5300 kg ha −1 , application of N or B did not increase seed yield at any rate or application stage, nor did cultivar, row spacing, or planting date alter this lack of response. Analysis of leaf tissue taken at the R2 soybean development stage and before nutrient application indicated that N and B concentrations were above the minimum level required by soybean for maximum yields not limited by N or B. Lack of response to supplemental N or B suggested that N supplied via fixation and soil organic matter mineralization and native levels of B in soils are adequate for high yields in the Mid‐Atlantic Coastal Plain soybean production region.
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Claims 4
Claim · model-written summary
Soil-applied N or foliar-applied B did not increase soybean seed yield at any rate or application stage.
- Taxon
- Glycine max
Glycine maxe0 - Treatment
- application of N or Be1
- Outcome
- seed yielde1
- Direction
- did not increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean [ Glycine max (L.) Merr.] yield is limited”
e1“application of N or B did not increase seed yield at any rate or application stage”
Claim · model-written summary
Cultivar, row spacing, or planting date did not alter the lack of response to N or B in soybean.
- Taxon
- Glycine maxGlycine maxe0
- Treatment
- cultivar, row spacing, or planting datee2
- Outcome
- lack of responsee2
- Direction
- no_changeinferrede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean [ Glycine max (L.) Merr.] yield is limited”
e2“nor did cultivar, row spacing, or planting date alter this lack of response”
Claim · model-written summary
Leaf N and B concentrations of soybean were above the minimum level required for maximum yields.
- Taxon
- Glycine maxGlycine maxe0
- Organ / stage
- leaf tissue taken at the R2 soybean development stagee4
- Outcome
- N and B concentrationse3
- Qualifier
- above the minimum level required by soybean for maximum yields not limited by N or Be3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean [ Glycine max (L.) Merr.] yield is limited”
e3“N and B concentrations were above the minimum level required by soybean for maximum yields not limited by N or B”
e4“Analysis of leaf tissue taken at the R2 soybean development stage”
Claim · model-written summary
Lack of response to N or B is attributed to N supply from fixation and mineralization and to native soil B.
- Taxon
- Glycine maxGlycine maxe0
- Outcome
- Lack of response to supplemental N or Be5
- Qualifier
- N supplied via fixation and soil organic matter mineralization and native levels of B in soilse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soybean [ Glycine max (L.) Merr.] yield is limited”
e5“Lack of response to supplemental N or B suggested that N supplied via fixation and soil organic matter mineralization and native levels of B in soils are adequate for high yields”
The same questions in other papers
nitrogen · yield · Glycine max (soybean)Positive and negative results
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- positive
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See all 416 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.